[PATCH 0/6] ftrace: port to the new ring_buffer

[PATCH 0/6] ftrace: port to the new ring_buffer

[Steven Rostedt]

These patches are against linux-tip.

The first is just a fix in the wakeup selftest.

The next is a port of the Unified tracer buffer to linux-tip and some updates.

After that is the ftrace port to use the ring buffer, followed by some
more enhancements to ftrace because of the new variable length
buffer.

I tried a few configurations and tried to test all the different ftrace
tracers, but I'm sure there may be some bugs still to work out. I worked
out all those that I found.

But, with the ring_buffer I can envision several ways to clean up
ftrace and to make adding new tracers cleaner.

I'm also thinking about making a way that each tracer can allocate
its own buffer, and allow for more than one tracer to be running
at the same time! (only with different buffers).

-- Steve

[PATCH 1/6] ftrace: give time for wakeup test to run

[Steven Rostedt]

[-- Attachment #1: ftrace-add-wait-in-wakeup-selftest.patch --]
[-- Type: text/plain, Size: 930 bytes --]

It is possible that the testing thread in the ftrace wakeup test does not
run before we stop the trace. This will cause the trace to fail since nothing
will be in the buffers.

This patch adds a small wait in the wakeup test to allow for the woken task
to run and be traced.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 kernel/trace/trace_selftest.c |    3 +++
 1 file changed, 3 insertions(+)

Index: linux-tip.git/kernel/trace/trace_selftest.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_selftest.c	2008-09-29 20:13:37.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_selftest.c	2008-09-29 20:14:30.000000000 -0400
@@ -498,6 +498,9 @@ trace_selftest_startup_wakeup(struct tra
 
 	wake_up_process(p);
 
+	/* give a little time to let the thread wake up */
+	msleep(100);
+
 	/* stop the tracing. */
 	tr->ctrl = 0;
 	trace->ctrl_update(tr);

-- 

[PATCH 2/6] Unified trace buffer

[Steven Rostedt]

[-- Attachment #1: ring-buffer.patch --]
[-- Type: text/plain, Size: 53109 bytes --]

This is a unified tracing buffer that implements a ring buffer that
hopefully everyone will eventually be able to use.

The events recorded into the buffer have the following structure:

struct ring_buffer_event {
	u32 type:2, len:3, time_delta:27;
	u32 array[];
};

The minimum size of an event is 8 bytes. All events are 4 byte
aligned inside the buffer.

There are 4 types (all internal use for the ring buffer, only
the data type is exported to the interface users).

RINGBUF_TYPE_PADDING: this type is used to note extra space at the end
	of a buffer page.

RINGBUF_TYPE_TIME_EXTENT: This type is used when the time between events
	is greater than the 27 bit delta can hold. We add another
	32 bits, and record that in its own event (8 byte size).

RINGBUF_TYPE_TIME_STAMP: (Not implemented yet). This will hold data to
	help keep the buffer timestamps in sync.

RINGBUF_TYPE_DATA: The event actually holds user data.

The "len" field is only three bits. Since the data must be
4 byte aligned, this field is shifted left by 2, giving a
max length of 28 bytes. If the data load is greater than 28
bytes, the first array field holds the full length of the
data load and the len field is set to zero.

Example, data size of 7 bytes:

	type = RINGBUF_TYPE_DATA
	len = 2
	time_delta: <time-stamp> - <prev_event-time-stamp>
	array[0..1]: <7 bytes of data> <1 byte empty>

This event is saved in 12 bytes of the buffer.

An event with 82 bytes of data:

	type = RINGBUF_TYPE_DATA
	len = 0
	time_delta: <time-stamp> - <prev_event-time-stamp>
	array[0]: 84 (Note the alignment)
	array[1..14]: <82 bytes of data> <2 bytes empty>

The above event is saved in 92 bytes (if my math is correct).
82 bytes of data, 2 bytes empty, 4 byte header, 4 byte length.

Do not reference the above event struct directly. Use the following
functions to gain access to the event table, since the
ring_buffer_event structure may change in the future.

ring_buffer_event_length(event): get the length of the event.
	This is the size of the memory used to record this
	event, and not the size of the data pay load.

ring_buffer_time_delta(event): get the time delta of the event
	This returns the delta time stamp since the last event.
	Note: Even though this is in the header, there should
		be no reason to access this directly, accept
		for debugging.

ring_buffer_event_data(event): get the data from the event
	This is the function to use to get the actual data
	from the event. Note, it is only a pointer to the
	data inside the buffer. This data must be copied to
	another location otherwise you risk it being written
	over in the buffer.

ring_buffer_lock: A way to lock the entire buffer.
ring_buffer_unlock: unlock the buffer.

ring_buffer_alloc: create a new ring buffer. Can choose between
	overwrite or consumer/producer mode. Overwrite will
	overwrite old data, where as consumer producer will
	throw away new data if the consumer catches up with the
	producer.  The consumer/producer is the default.

ring_buffer_free: free the ring buffer.

ring_buffer_resize: resize the buffer. Changes the size of each cpu
	buffer. Note, it is up to the caller to provide that
	the buffer is not being used while this is happening.
	This requirement may go away but do not count on it.

ring_buffer_lock_reserve: locks the ring buffer and allocates an
	entry on the buffer to write to.
ring_buffer_unlock_commit: unlocks the ring buffer and commits it to
	the buffer.

ring_buffer_write: writes some data into the ring buffer.

ring_buffer_peek: Look at a next item in the cpu buffer.
ring_buffer_consume: get the next item in the cpu buffer and
	consume it. That is, this function increments the head
	pointer.

ring_buffer_read_start: Start an iterator of a cpu buffer.
	For now, this disables the cpu buffer, until you issue
	a finish. This is just because we do not want the iterator
	to be overwritten. This restriction may change in the future.
	But note, this is used for static reading of a buffer which
	is usually done "after" a trace. Live readings would want
	to use the ring_buffer_consume above, which will not
	disable the ring buffer.

ring_buffer_read_finish: Finishes the read iterator and reenables
	the ring buffer.

ring_buffer_iter_peek: Look at the next item in the cpu iterator.
ring_buffer_read: Read the iterator and increment it.
ring_buffer_iter_reset: Reset the iterator to point to the beginning
	of the cpu buffer.
ring_buffer_iter_empty: Returns true if the iterator is at the end
	of the cpu buffer.

ring_buffer_size: returns the size in bytes of each cpu buffer.
	Note, the real size is this times the number of CPUs.

ring_buffer_reset_cpu: Sets the cpu buffer to empty
ring_buffer_reset: sets all cpu buffers to empty

ring_buffer_swap_cpu: swaps a cpu buffer from one buffer with a
	cpu buffer of another buffer. This is handy when you
	want to take a snap shot of a running trace on just one
	cpu. Having a backup buffer, to swap with facilitates this.
	Ftrace max latencies use this.

ring_buffer_empty: Returns true if the ring buffer is empty.
ring_buffer_empty_cpu: Returns true if the cpu buffer is empty.

ring_buffer_record_disable: disable all cpu buffers (read only)
ring_buffer_record_disable_cpu: disable a single cpu buffer (read only)
ring_buffer_record_enable: enable all cpu buffers.
ring_buffer_record_enabl_cpu: enable a single cpu buffer.

ring_buffer_entries: The number of entries in a ring buffer.
ring_buffer_overruns: The number of entries removed due to writing wrap.

ring_buffer_time_stamp: Get the time stamp used by the ring buffer
ring_buffer_normalize_time_stamp: normalize the ring buffer time stamp
	into nanosecs.

I still need to implement the GTOD feature. But we need support from
the cpu frequency infrastructure.  But this can be done at a later
time without affecting the ring buffer interface.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 include/linux/ring_buffer.h |  130 +++
 kernel/trace/Kconfig        |    4 
 kernel/trace/Makefile       |    1 
 kernel/trace/ring_buffer.c  | 1672 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 1807 insertions(+)

Index: linux-tip.git/include/linux/ring_buffer.h
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-tip.git/include/linux/ring_buffer.h	2008-09-29 12:49:46.000000000 -0400
@@ -0,0 +1,130 @@
+#ifndef _LINUX_RING_BUFFER_H
+#define _LINUX_RING_BUFFER_H
+
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+
+struct ring_buffer;
+struct ring_buffer_iter;
+
+/*
+ * Don't reference this struct directly, use functions below.
+ */
+struct ring_buffer_event {
+	u32		type:2, len:3, time_delta:27;
+	u32		array[];
+};
+
+/**
+ * enum ring_buffer_type - internal ring buffer types
+ *
+ * @RINGBUF_TYPE_PADDING:	Left over page padding
+ *				 array is ignored
+ *				 size is variable depending on how much
+ *				  padding is needed
+ *
+ * @RINGBUF_TYPE_TIME_EXTEND:	Extend the time delta
+ *				 array[0] = time delta (28 .. 59)
+ *				 size = 8 bytes
+ *
+ * @RINGBUF_TYPE_TIME_STAMP:	Sync time stamp with external clock
+ *				 array[0] = tv_nsec
+ *				 array[1] = tv_sec
+ *				 size = 16 bytes
+ *
+ * @RINGBUF_TYPE_DATA:		Data record
+ *				 If len is zero:
+ *				  array[0] holds the actual length
+ *				  array[1..(length+3)/4-1] holds data
+ *				 else
+ *				  length = len << 2
+ *				  array[0..(length+3)/4] holds data
+ */
+enum ring_buffer_type {
+	RINGBUF_TYPE_PADDING,
+	RINGBUF_TYPE_TIME_EXTEND,
+	/* FIXME: RINGBUF_TYPE_TIME_STAMP not implemented */
+	RINGBUF_TYPE_TIME_STAMP,
+	RINGBUF_TYPE_DATA,
+};
+
+unsigned ring_buffer_event_length(struct ring_buffer_event *event);
+void *ring_buffer_event_data(struct ring_buffer_event *event);
+
+/**
+ * ring_buffer_event_time_delta - return the delta timestamp of the event
+ * @event: the event to get the delta timestamp of
+ *
+ * The delta timestamp is the 27 bit timestamp since the last event.
+ */
+static inline unsigned
+ring_buffer_event_time_delta(struct ring_buffer_event *event)
+{
+	return event->time_delta;
+}
+
+void ring_buffer_lock(struct ring_buffer *buffer, unsigned long *flags);
+void ring_buffer_unlock(struct ring_buffer *buffer, unsigned long flags);
+
+/*
+ * size is in bytes for each per CPU buffer.
+ */
+struct ring_buffer *
+ring_buffer_alloc(unsigned long size, unsigned flags);
+void ring_buffer_free(struct ring_buffer *buffer);
+
+int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size);
+
+struct ring_buffer_event *
+ring_buffer_lock_reserve(struct ring_buffer *buffer,
+			 unsigned long length,
+			 unsigned long *flags);
+int ring_buffer_unlock_commit(struct ring_buffer *buffer,
+			      struct ring_buffer_event *event,
+			      unsigned long flags);
+int ring_buffer_write(struct ring_buffer *buffer,
+		      unsigned long length, void *data);
+
+struct ring_buffer_event *
+ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts);
+struct ring_buffer_event *
+ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts);
+
+struct ring_buffer_iter *
+ring_buffer_read_start(struct ring_buffer *buffer, int cpu);
+void ring_buffer_read_finish(struct ring_buffer_iter *iter);
+
+struct ring_buffer_event *
+ring_buffer_iter_peek(struct ring_buffer_iter *iter, u64 *ts);
+struct ring_buffer_event *
+ring_buffer_read(struct ring_buffer_iter *iter, u64 *ts);
+void ring_buffer_iter_reset(struct ring_buffer_iter *iter);
+int ring_buffer_iter_empty(struct ring_buffer_iter *iter);
+
+unsigned long ring_buffer_size(struct ring_buffer *buffer);
+
+void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu);
+void ring_buffer_reset(struct ring_buffer *buffer);
+
+int ring_buffer_swap_cpu(struct ring_buffer *buffer_a,
+			 struct ring_buffer *buffer_b, int cpu);
+
+int ring_buffer_empty(struct ring_buffer *buffer);
+int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu);
+
+void ring_buffer_record_disable(struct ring_buffer *buffer);
+void ring_buffer_record_enable(struct ring_buffer *buffer);
+void ring_buffer_record_disable_cpu(struct ring_buffer *buffer, int cpu);
+void ring_buffer_record_enable_cpu(struct ring_buffer *buffer, int cpu);
+
+unsigned long ring_buffer_entries(struct ring_buffer *buffer);
+unsigned long ring_buffer_overruns(struct ring_buffer *buffer);
+
+u64 ring_buffer_time_stamp(int cpu);
+void ring_buffer_normalize_time_stamp(int cpu, u64 *ts);
+
+enum ring_buffer_flags {
+	RB_FL_OVERWRITE		= 1 << 0,
+};
+
+#endif /* _LINUX_RING_BUFFER_H */
Index: linux-tip.git/kernel/trace/ring_buffer.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-tip.git/kernel/trace/ring_buffer.c	2008-09-29 12:49:46.000000000 -0400
@@ -0,0 +1,1672 @@
+/*
+ * Generic ring buffer
+ *
+ * Copyright (C) 2008 Steven Rostedt <srostedt@redhat.com>
+ */
+#include <linux/ring_buffer.h>
+#include <linux/spinlock.h>
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include <linux/percpu.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>	/* used for sched_clock() (for now) */
+#include <linux/init.h>
+#include <linux/hash.h>
+#include <linux/list.h>
+#include <linux/fs.h>
+
+/* Up this if you want to test the TIME_EXTENTS and normalization */
+#define DEBUG_SHIFT 0
+
+/* FIXME!!! */
+u64 ring_buffer_time_stamp(int cpu)
+{
+	/* shift to debug/test normalization and TIME_EXTENTS */
+	return sched_clock() << DEBUG_SHIFT;
+}
+
+void ring_buffer_normalize_time_stamp(int cpu, u64 *ts)
+{
+	/* Just stupid testing the normalize function and deltas */
+	*ts >>= DEBUG_SHIFT;
+}
+
+#define RB_EVNT_HDR_SIZE (sizeof(struct ring_buffer_event))
+#define RB_ALIGNMENT_SHIFT	2
+#define RB_ALIGNMENT		(1 << RB_ALIGNMENT_SHIFT)
+#define RB_MAX_SMALL_DATA	28
+
+enum {
+	RB_LEN_TIME_EXTEND = 8,
+	RB_LEN_TIME_STAMP = 16,
+};
+
+/* inline for ring buffer fast paths */
+static inline unsigned
+rb_event_length(struct ring_buffer_event *event)
+{
+	unsigned length;
+
+	switch (event->type) {
+	case RINGBUF_TYPE_PADDING:
+		/* undefined */
+		return -1;
+
+	case RINGBUF_TYPE_TIME_EXTEND:
+		return RB_LEN_TIME_EXTEND;
+
+	case RINGBUF_TYPE_TIME_STAMP:
+		return RB_LEN_TIME_STAMP;
+
+	case RINGBUF_TYPE_DATA:
+		if (event->len)
+			length = event->len << RB_ALIGNMENT_SHIFT;
+		else
+			length = event->array[0];
+		return length + RB_EVNT_HDR_SIZE;
+	default:
+		BUG();
+	}
+	/* not hit */
+	return 0;
+}
+
+/**
+ * ring_buffer_event_length - return the length of the event
+ * @event: the event to get the length of
+ */
+unsigned ring_buffer_event_length(struct ring_buffer_event *event)
+{
+	return rb_event_length(event);
+}
+
+/* inline for ring buffer fast paths */
+static inline void *
+rb_event_data(struct ring_buffer_event *event)
+{
+	BUG_ON(event->type != RINGBUF_TYPE_DATA);
+	/* If length is in len field, then array[0] has the data */
+	if (event->len)
+		return (void *)&event->array[0];
+	/* Otherwise length is in array[0] and array[1] has the data */
+	return (void *)&event->array[1];
+}
+
+/**
+ * ring_buffer_event_data - return the data of the event
+ * @event: the event to get the data from
+ */
+void *ring_buffer_event_data(struct ring_buffer_event *event)
+{
+	return rb_event_data(event);
+}
+
+#define for_each_buffer_cpu(buffer, cpu)		\
+	for_each_cpu_mask(cpu, buffer->cpumask)
+
+#define TS_SHIFT	27
+#define TS_MASK		((1ULL << TS_SHIFT) - 1)
+#define TS_DELTA_TEST	(~TS_MASK)
+
+/*
+ * This hack stolen from mm/slob.c.
+ * We can store per page timing information in the page frame of the page.
+ * Thanks to Peter Zijlstra for suggesting this idea.
+ */
+struct buffer_page {
+	union {
+		struct {
+			unsigned long	 flags;		/* mandatory */
+			atomic_t	 _count;	/* mandatory */
+			u64		 time_stamp;	/* page time stamp */
+			unsigned	 size;		/* size of page data */
+			struct list_head list;		/* list of free pages */
+		};
+		struct page page;
+	};
+};
+
+/*
+ * We need to fit the time_stamp delta into 27 bits.
+ */
+static inline int test_time_stamp(u64 delta)
+{
+	if (delta & TS_DELTA_TEST)
+		return 1;
+	return 0;
+}
+
+#define BUF_PAGE_SIZE PAGE_SIZE
+
+/*
+ * head_page == tail_page && head == tail then buffer is empty.
+ */
+struct ring_buffer_per_cpu {
+	int				cpu;
+	struct ring_buffer		*buffer;
+	spinlock_t			lock;
+	struct lock_class_key		lock_key;
+	struct list_head		pages;
+	unsigned long			head;	/* read from head */
+	unsigned long			tail;	/* write to tail */
+	struct buffer_page		*head_page;
+	struct buffer_page		*tail_page;
+	unsigned long			overrun;
+	unsigned long			entries;
+	u64				write_stamp;
+	u64				read_stamp;
+	atomic_t			record_disabled;
+};
+
+struct ring_buffer {
+	unsigned long			size;
+	unsigned			pages;
+	unsigned			flags;
+	int				cpus;
+	cpumask_t			cpumask;
+	atomic_t			record_disabled;
+
+	struct mutex			mutex;
+
+	struct ring_buffer_per_cpu	**buffers;
+};
+
+struct ring_buffer_iter {
+	struct ring_buffer_per_cpu	*cpu_buffer;
+	unsigned long			head;
+	struct buffer_page		*head_page;
+	u64				read_stamp;
+};
+
+#define RB_WARN_ON(buffer, cond)			\
+	if (unlikely(cond)) {				\
+		atomic_inc(&buffer->record_disabled);	\
+		WARN_ON(1);				\
+		return -1;				\
+	}
+
+/**
+ * check_pages - integrity check of buffer pages
+ * @cpu_buffer: CPU buffer with pages to test
+ *
+ * As a safty measure we check to make sure the data pages have not
+ * been corrupted.
+ */
+static int rb_check_pages(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	struct list_head *head = &cpu_buffer->pages;
+	struct buffer_page *page, *tmp;
+
+	RB_WARN_ON(cpu_buffer, head->next->prev != head);
+	RB_WARN_ON(cpu_buffer, head->prev->next != head);
+
+	list_for_each_entry_safe(page, tmp, head, list) {
+		RB_WARN_ON(cpu_buffer, page->list.next->prev != &page->list);
+		RB_WARN_ON(cpu_buffer, page->list.prev->next != &page->list);
+	}
+
+	return 0;
+}
+
+static unsigned rb_head_size(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	return cpu_buffer->head_page->size;
+}
+
+static int rb_allocate_pages(struct ring_buffer_per_cpu *cpu_buffer,
+			     unsigned nr_pages)
+{
+	struct list_head *head = &cpu_buffer->pages;
+	struct buffer_page *page, *tmp;
+	unsigned long addr;
+	LIST_HEAD(pages);
+	unsigned i;
+
+	for (i = 0; i < nr_pages; i++) {
+		addr = __get_free_page(GFP_KERNEL);
+		if (!addr)
+			goto free_pages;
+		page = (struct buffer_page *)virt_to_page(addr);
+		list_add(&page->list, &pages);
+	}
+
+	list_splice(&pages, head);
+
+	rb_check_pages(cpu_buffer);
+
+	return 0;
+
+ free_pages:
+	list_for_each_entry_safe(page, tmp, &pages, list) {
+		list_del_init(&page->list);
+		__free_page(&page->page);
+	}
+	return -ENOMEM;
+}
+
+static struct ring_buffer_per_cpu *
+rb_allocate_cpu_buffer(struct ring_buffer *buffer, int cpu)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	int ret;
+
+	cpu_buffer = kzalloc_node(ALIGN(sizeof(*cpu_buffer), cache_line_size()),
+				  GFP_KERNEL, cpu_to_node(cpu));
+	if (!cpu_buffer)
+		return NULL;
+
+	cpu_buffer->cpu = cpu;
+	cpu_buffer->buffer = buffer;
+	spin_lock_init(&cpu_buffer->lock);
+	INIT_LIST_HEAD(&cpu_buffer->pages);
+
+	ret = rb_allocate_pages(cpu_buffer, buffer->pages);
+	if (ret < 0)
+		goto fail_free_buffer;
+
+	cpu_buffer->head_page
+		= list_entry(cpu_buffer->pages.next, struct buffer_page, list);
+	cpu_buffer->tail_page
+		= list_entry(cpu_buffer->pages.next, struct buffer_page, list);
+
+	return cpu_buffer;
+
+ fail_free_buffer:
+	kfree(cpu_buffer);
+	return NULL;
+}
+
+static void rb_free_cpu_buffer(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	struct list_head *head = &cpu_buffer->pages;
+	struct buffer_page *page, *tmp;
+
+	list_for_each_entry_safe(page, tmp, head, list) {
+		list_del_init(&page->list);
+		__free_page(&page->page);
+	}
+	kfree(cpu_buffer);
+}
+
+/**
+ * ring_buffer_alloc - allocate a new ring_buffer
+ * @size: the size in bytes that is needed.
+ * @flags: attributes to set for the ring buffer.
+ *
+ * Currently the only flag that is available is the RB_FL_OVERWRITE
+ * flag. This flag means that the buffer will overwrite old data
+ * when the buffer wraps. If this flag is not set, the buffer will
+ * drop data when the tail hits the head.
+ */
+struct ring_buffer *ring_buffer_alloc(unsigned long size, unsigned flags)
+{
+	struct ring_buffer *buffer;
+	int bsize;
+	int cpu;
+
+	/* keep it in its own cache line */
+	buffer = kzalloc(ALIGN(sizeof(*buffer), cache_line_size()),
+			 GFP_KERNEL);
+	if (!buffer)
+		return NULL;
+
+	buffer->pages = DIV_ROUND_UP(size, BUF_PAGE_SIZE);
+	buffer->flags = flags;
+
+	/* need at least two pages */
+	if (buffer->pages == 1)
+		buffer->pages++;
+
+	buffer->cpumask = cpu_possible_map;
+	buffer->cpus = nr_cpu_ids;
+
+	bsize = sizeof(void *) * nr_cpu_ids;
+	buffer->buffers = kzalloc(ALIGN(bsize, cache_line_size()),
+				  GFP_KERNEL);
+	if (!buffer->buffers)
+		goto fail_free_buffer;
+
+	for_each_buffer_cpu(buffer, cpu) {
+		buffer->buffers[cpu] =
+			rb_allocate_cpu_buffer(buffer, cpu);
+		if (!buffer->buffers[cpu])
+			goto fail_free_buffers;
+	}
+
+	mutex_init(&buffer->mutex);
+
+	return buffer;
+
+ fail_free_buffers:
+	for_each_buffer_cpu(buffer, cpu) {
+		if (buffer->buffers[cpu])
+			rb_free_cpu_buffer(buffer->buffers[cpu]);
+	}
+	kfree(buffer->buffers);
+
+ fail_free_buffer:
+	kfree(buffer);
+	return NULL;
+}
+
+/**
+ * ring_buffer_free - free a ring buffer.
+ * @buffer: the buffer to free.
+ */
+void
+ring_buffer_free(struct ring_buffer *buffer)
+{
+	int cpu;
+
+	for_each_buffer_cpu(buffer, cpu)
+		rb_free_cpu_buffer(buffer->buffers[cpu]);
+
+	kfree(buffer);
+}
+
+static void rb_reset_cpu(struct ring_buffer_per_cpu *cpu_buffer);
+
+static void
+rb_remove_pages(struct ring_buffer_per_cpu *cpu_buffer, unsigned nr_pages)
+{
+	struct buffer_page *page;
+	struct list_head *p;
+	unsigned i;
+
+	atomic_inc(&cpu_buffer->record_disabled);
+	synchronize_sched();
+
+	for (i = 0; i < nr_pages; i++) {
+		BUG_ON(list_empty(&cpu_buffer->pages));
+		p = cpu_buffer->pages.next;
+		page = list_entry(p, struct buffer_page, list);
+		list_del_init(&page->list);
+		__free_page(&page->page);
+	}
+	BUG_ON(list_empty(&cpu_buffer->pages));
+
+	rb_reset_cpu(cpu_buffer);
+
+	rb_check_pages(cpu_buffer);
+
+	atomic_dec(&cpu_buffer->record_disabled);
+
+}
+
+static void
+rb_insert_pages(struct ring_buffer_per_cpu *cpu_buffer,
+		struct list_head *pages, unsigned nr_pages)
+{
+	struct buffer_page *page;
+	struct list_head *p;
+	unsigned i;
+
+	atomic_inc(&cpu_buffer->record_disabled);
+	synchronize_sched();
+
+	for (i = 0; i < nr_pages; i++) {
+		BUG_ON(list_empty(pages));
+		p = pages->next;
+		page = list_entry(p, struct buffer_page, list);
+		list_del_init(&page->list);
+		list_add_tail(&page->list, &cpu_buffer->pages);
+	}
+	rb_reset_cpu(cpu_buffer);
+
+	rb_check_pages(cpu_buffer);
+
+	atomic_dec(&cpu_buffer->record_disabled);
+}
+
+/**
+ * ring_buffer_resize - resize the ring buffer
+ * @buffer: the buffer to resize.
+ * @size: the new size.
+ *
+ * The tracer is responsible for making sure that the buffer is
+ * not being used while changing the size.
+ * Note: We may be able to change the above requirement by using
+ *  RCU synchronizations.
+ *
+ * Minimum size is 2 * BUF_PAGE_SIZE.
+ *
+ * Returns -1 on failure.
+ */
+int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	unsigned nr_pages, rm_pages, new_pages;
+	struct buffer_page *page, *tmp;
+	unsigned long buffer_size;
+	unsigned long addr;
+	LIST_HEAD(pages);
+	int i, cpu;
+
+	size = DIV_ROUND_UP(size, BUF_PAGE_SIZE);
+	size *= BUF_PAGE_SIZE;
+	buffer_size = buffer->pages * BUF_PAGE_SIZE;
+
+	/* we need a minimum of two pages */
+	if (size < BUF_PAGE_SIZE * 2)
+		size = BUF_PAGE_SIZE * 2;
+
+	if (size == buffer_size)
+		return size;
+
+	mutex_lock(&buffer->mutex);
+
+	nr_pages = DIV_ROUND_UP(size, BUF_PAGE_SIZE);
+
+	if (size < buffer_size) {
+
+		/* easy case, just free pages */
+		BUG_ON(nr_pages >= buffer->pages);
+
+		rm_pages = buffer->pages - nr_pages;
+
+		for_each_buffer_cpu(buffer, cpu) {
+			cpu_buffer = buffer->buffers[cpu];
+			rb_remove_pages(cpu_buffer, rm_pages);
+		}
+		goto out;
+	}
+
+	/*
+	 * This is a bit more difficult. We only want to add pages
+	 * when we can allocate enough for all CPUs. We do this
+	 * by allocating all the pages and storing them on a local
+	 * link list. If we succeed in our allocation, then we
+	 * add these pages to the cpu_buffers. Otherwise we just free
+	 * them all and return -ENOMEM;
+	 */
+	BUG_ON(nr_pages <= buffer->pages);
+	new_pages = nr_pages - buffer->pages;
+
+	for_each_buffer_cpu(buffer, cpu) {
+		for (i = 0; i < new_pages; i++) {
+			addr = __get_free_page(GFP_KERNEL);
+			if (!addr)
+				goto free_pages;
+			page = (struct buffer_page *)virt_to_page(addr);
+			list_add(&page->list, &pages);
+		}
+	}
+
+	for_each_buffer_cpu(buffer, cpu) {
+		cpu_buffer = buffer->buffers[cpu];
+		rb_insert_pages(cpu_buffer, &pages, new_pages);
+	}
+
+	BUG_ON(!list_empty(&pages));
+
+ out:
+	buffer->pages = nr_pages;
+	mutex_unlock(&buffer->mutex);
+
+	return size;
+
+ free_pages:
+	list_for_each_entry_safe(page, tmp, &pages, list) {
+		list_del_init(&page->list);
+		__free_page(&page->page);
+	}
+	return -ENOMEM;
+}
+
+static inline int rb_per_cpu_empty(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	return cpu_buffer->head_page == cpu_buffer->tail_page &&
+		cpu_buffer->head == cpu_buffer->tail;
+}
+
+static inline int rb_null_event(struct ring_buffer_event *event)
+{
+	return event->type == RINGBUF_TYPE_PADDING;
+}
+
+static inline void *rb_page_index(struct buffer_page *page, unsigned index)
+{
+	void *addr = page_address(&page->page);
+
+	return addr + index;
+}
+
+static inline struct ring_buffer_event *
+rb_head_event(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	return rb_page_index(cpu_buffer->head_page,
+			     cpu_buffer->head);
+}
+
+static inline struct ring_buffer_event *
+rb_iter_head_event(struct ring_buffer_iter *iter)
+{
+	return rb_page_index(iter->head_page,
+			     iter->head);
+}
+
+/*
+ * When the tail hits the head and the buffer is in overwrite mode,
+ * the head jumps to the next page and all content on the previous
+ * page is discarded. But before doing so, we update the overrun
+ * variable of the buffer.
+ */
+static void rb_update_overflow(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	struct ring_buffer_event *event;
+	unsigned long head;
+
+	for (head = 0; head < rb_head_size(cpu_buffer);
+	     head += rb_event_length(event)) {
+
+		event = rb_page_index(cpu_buffer->head_page, head);
+		BUG_ON(rb_null_event(event));
+		/* Only count data entries */
+		if (event->type != RINGBUF_TYPE_DATA)
+			continue;
+		cpu_buffer->overrun++;
+		cpu_buffer->entries--;
+	}
+}
+
+static inline void rb_inc_page(struct ring_buffer_per_cpu *cpu_buffer,
+			       struct buffer_page **page)
+{
+	struct list_head *p = (*page)->list.next;
+
+	if (p == &cpu_buffer->pages)
+		p = p->next;
+
+	*page = list_entry(p, struct buffer_page, list);
+}
+
+static inline void
+rb_add_stamp(struct ring_buffer_per_cpu *cpu_buffer, u64 *ts)
+{
+	cpu_buffer->tail_page->time_stamp = *ts;
+	cpu_buffer->write_stamp = *ts;
+}
+
+static void rb_reset_read_page(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	cpu_buffer->read_stamp = cpu_buffer->head_page->time_stamp;
+	cpu_buffer->head = 0;
+}
+
+static void
+rb_reset_iter_read_page(struct ring_buffer_iter *iter)
+{
+	iter->read_stamp = iter->head_page->time_stamp;
+	iter->head = 0;
+}
+
+/**
+ * ring_buffer_update_event - update event type and data
+ * @event: the even to update
+ * @type: the type of event
+ * @length: the size of the event field in the ring buffer
+ *
+ * Update the type and data fields of the event. The length
+ * is the actual size that is written to the ring buffer,
+ * and with this, we can determine what to place into the
+ * data field.
+ */
+static inline void
+rb_update_event(struct ring_buffer_event *event,
+			 unsigned type, unsigned length)
+{
+	event->type = type;
+
+	switch (type) {
+
+	case RINGBUF_TYPE_PADDING:
+		break;
+
+	case RINGBUF_TYPE_TIME_EXTEND:
+		event->len =
+			(RB_LEN_TIME_EXTEND + (RB_ALIGNMENT-1))
+			>> RB_ALIGNMENT_SHIFT;
+		break;
+
+	case RINGBUF_TYPE_TIME_STAMP:
+		event->len =
+			(RB_LEN_TIME_STAMP + (RB_ALIGNMENT-1))
+			>> RB_ALIGNMENT_SHIFT;
+		break;
+
+	case RINGBUF_TYPE_DATA:
+		length -= RB_EVNT_HDR_SIZE;
+		if (length > RB_MAX_SMALL_DATA) {
+			event->len = 0;
+			event->array[0] = length;
+		} else
+			event->len =
+				(length + (RB_ALIGNMENT-1))
+				>> RB_ALIGNMENT_SHIFT;
+		break;
+	default:
+		BUG();
+	}
+}
+
+static inline unsigned rb_calculate_event_length(unsigned length)
+{
+	struct ring_buffer_event event; /* Used only for sizeof array */
+
+	/* zero length can cause confusions */
+	if (!length)
+		length = 1;
+
+	if (length > RB_MAX_SMALL_DATA)
+		length += sizeof(event.array[0]);
+
+	length += RB_EVNT_HDR_SIZE;
+	length = ALIGN(length, RB_ALIGNMENT);
+
+	return length;
+}
+
+static struct ring_buffer_event *
+__rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
+		  unsigned type, unsigned long length, u64 *ts)
+{
+	struct buffer_page *head_page, *tail_page;
+	unsigned long tail;
+	struct ring_buffer *buffer = cpu_buffer->buffer;
+	struct ring_buffer_event *event;
+
+	tail_page = cpu_buffer->tail_page;
+	head_page = cpu_buffer->head_page;
+	tail = cpu_buffer->tail;
+
+	if (tail + length > BUF_PAGE_SIZE) {
+		struct buffer_page *next_page = tail_page;
+
+		rb_inc_page(cpu_buffer, &next_page);
+
+		if (next_page == head_page) {
+			if (!(buffer->flags & RB_FL_OVERWRITE))
+				return NULL;
+
+			/* count overflows */
+			rb_update_overflow(cpu_buffer);
+
+			rb_inc_page(cpu_buffer, &head_page);
+			cpu_buffer->head_page = head_page;
+			rb_reset_read_page(cpu_buffer);
+		}
+
+		if (tail != BUF_PAGE_SIZE) {
+			event = rb_page_index(tail_page, tail);
+			/* page padding */
+			event->type = RINGBUF_TYPE_PADDING;
+		}
+
+		tail_page->size = tail;
+		tail_page = next_page;
+		tail_page->size = 0;
+		tail = 0;
+		cpu_buffer->tail_page = tail_page;
+		cpu_buffer->tail = tail;
+		rb_add_stamp(cpu_buffer, ts);
+	}
+
+	BUG_ON(tail + length > BUF_PAGE_SIZE);
+
+	event = rb_page_index(tail_page, tail);
+	rb_update_event(event, type, length);
+
+	return event;
+}
+
+static int
+rb_add_time_stamp(struct ring_buffer_per_cpu *cpu_buffer,
+		  u64 *ts, u64 *delta)
+{
+	struct ring_buffer_event *event;
+	static int once;
+
+	if (unlikely(*delta > (1ULL << 59) && !once++)) {
+		printk(KERN_WARNING "Delta way too big! %llu"
+		       " ts=%llu write stamp = %llu\n",
+		       *delta, *ts, cpu_buffer->write_stamp);
+		WARN_ON(1);
+	}
+
+	/*
+	 * The delta is too big, we to add a
+	 * new timestamp.
+	 */
+	event = __rb_reserve_next(cpu_buffer,
+				  RINGBUF_TYPE_TIME_EXTEND,
+				  RB_LEN_TIME_EXTEND,
+				  ts);
+	if (!event)
+		return -1;
+
+	/* check to see if we went to the next page */
+	if (cpu_buffer->tail) {
+		/* Still on same page, update timestamp */
+		event->time_delta = *delta & TS_MASK;
+		event->array[0] = *delta >> TS_SHIFT;
+		/* commit the time event */
+		cpu_buffer->tail +=
+			rb_event_length(event);
+		cpu_buffer->write_stamp = *ts;
+		*delta = 0;
+	}
+
+	return 0;
+}
+
+static struct ring_buffer_event *
+rb_reserve_next_event(struct ring_buffer_per_cpu *cpu_buffer,
+		      unsigned type, unsigned long length)
+{
+	struct ring_buffer_event *event;
+	u64 ts, delta;
+
+	ts = ring_buffer_time_stamp(cpu_buffer->cpu);
+
+	if (cpu_buffer->tail) {
+		delta = ts - cpu_buffer->write_stamp;
+
+		if (test_time_stamp(delta)) {
+			int ret;
+
+			ret = rb_add_time_stamp(cpu_buffer, &ts, &delta);
+			if (ret < 0)
+				return NULL;
+		}
+	} else {
+		rb_add_stamp(cpu_buffer, &ts);
+		delta = 0;
+	}
+
+	event = __rb_reserve_next(cpu_buffer, type, length, &ts);
+	if (!event)
+		return NULL;
+
+	/* If the reserve went to the next page, our delta is zero */
+	if (!cpu_buffer->tail)
+		delta = 0;
+
+	event->time_delta = delta;
+
+	return event;
+}
+
+/**
+ * ring_buffer_lock_reserve - reserve a part of the buffer
+ * @buffer: the ring buffer to reserve from
+ * @length: the length of the data to reserve (excluding event header)
+ * @flags: a pointer to save the interrupt flags
+ *
+ * Returns a reseverd event on the ring buffer to copy directly to.
+ * The user of this interface will need to get the body to write into
+ * and can use the ring_buffer_event_data() interface.
+ *
+ * The length is the length of the data needed, not the event length
+ * which also includes the event header.
+ *
+ * Must be paired with ring_buffer_unlock_commit, unless NULL is returned.
+ * If NULL is returned, then nothing has been allocated or locked.
+ */
+struct ring_buffer_event *
+ring_buffer_lock_reserve(struct ring_buffer *buffer,
+			 unsigned long length,
+			 unsigned long *flags)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	struct ring_buffer_event *event;
+	int cpu;
+
+	if (atomic_read(&buffer->record_disabled))
+		return NULL;
+
+	raw_local_irq_save(*flags);
+	cpu = raw_smp_processor_id();
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		goto out_irq;
+
+	cpu_buffer = buffer->buffers[cpu];
+	spin_lock(&cpu_buffer->lock);
+
+	if (atomic_read(&cpu_buffer->record_disabled))
+		goto no_record;
+
+	length = rb_calculate_event_length(length);
+	if (length > BUF_PAGE_SIZE)
+		return NULL;
+
+	event = rb_reserve_next_event(cpu_buffer, RINGBUF_TYPE_DATA, length);
+	if (!event)
+		goto no_record;
+
+	return event;
+
+ no_record:
+	spin_unlock(&cpu_buffer->lock);
+ out_irq:
+	local_irq_restore(*flags);
+	return NULL;
+}
+
+static void rb_commit(struct ring_buffer_per_cpu *cpu_buffer,
+		      struct ring_buffer_event *event)
+{
+	cpu_buffer->tail += rb_event_length(event);
+	cpu_buffer->tail_page->size = cpu_buffer->tail;
+	cpu_buffer->write_stamp += event->time_delta;
+	cpu_buffer->entries++;
+}
+
+/**
+ * ring_buffer_unlock_commit - commit a reserved
+ * @buffer: The buffer to commit to
+ * @event: The event pointer to commit.
+ * @flags: the interrupt flags received from ring_buffer_lock_reserve.
+ *
+ * This commits the data to the ring buffer, and releases any locks held.
+ *
+ * Must be paired with ring_buffer_lock_reserve.
+ */
+int ring_buffer_unlock_commit(struct ring_buffer *buffer,
+			      struct ring_buffer_event *event,
+			      unsigned long flags)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	int cpu = raw_smp_processor_id();
+
+	cpu_buffer = buffer->buffers[cpu];
+
+	assert_spin_locked(&cpu_buffer->lock);
+
+	rb_commit(cpu_buffer, event);
+
+	spin_unlock(&cpu_buffer->lock);
+	raw_local_irq_restore(flags);
+
+	return 0;
+}
+
+/**
+ * ring_buffer_write - write data to the buffer without reserving
+ * @buffer: The ring buffer to write to.
+ * @length: The length of the data being written (excluding the event header)
+ * @data: The data to write to the buffer.
+ *
+ * This is like ring_buffer_lock_reserve and ring_buffer_unlock_commit as
+ * one function. If you already have the data to write to the buffer, it
+ * may be easier to simply call this function.
+ *
+ * Note, like ring_buffer_lock_reserve, the length is the length of the data
+ * and not the length of the event which would hold the header.
+ */
+int ring_buffer_write(struct ring_buffer *buffer,
+			unsigned long length,
+			void *data)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	struct ring_buffer_event *event;
+	unsigned long event_length, flags;
+	void *body;
+	int ret = -EBUSY;
+	int cpu;
+
+	if (atomic_read(&buffer->record_disabled))
+		return -EBUSY;
+
+	local_irq_save(flags);
+	cpu = raw_smp_processor_id();
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		goto out_irq;
+
+	cpu_buffer = buffer->buffers[cpu];
+	spin_lock(&cpu_buffer->lock);
+
+	if (atomic_read(&cpu_buffer->record_disabled))
+		goto out;
+
+	event_length = rb_calculate_event_length(length);
+	event = rb_reserve_next_event(cpu_buffer,
+				      RINGBUF_TYPE_DATA, event_length);
+	if (!event)
+		goto out;
+
+	body = rb_event_data(event);
+
+	memcpy(body, data, length);
+
+	rb_commit(cpu_buffer, event);
+
+	ret = 0;
+ out:
+	spin_unlock(&cpu_buffer->lock);
+ out_irq:
+	local_irq_restore(flags);
+
+	return ret;
+}
+
+/**
+ * ring_buffer_lock - lock the ring buffer
+ * @buffer: The ring buffer to lock
+ * @flags: The place to store the interrupt flags
+ *
+ * This locks all the per CPU buffers.
+ *
+ * Must be unlocked by ring_buffer_unlock.
+ */
+void ring_buffer_lock(struct ring_buffer *buffer, unsigned long *flags)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	int cpu;
+
+	local_irq_save(*flags);
+
+	for_each_buffer_cpu(buffer, cpu) {
+		cpu_buffer = buffer->buffers[cpu];
+		spin_lock(&cpu_buffer->lock);
+	}
+}
+
+/**
+ * ring_buffer_unlock - unlock a locked buffer
+ * @buffer: The locked buffer to unlock
+ * @flags: The interrupt flags received by ring_buffer_lock
+ */
+void ring_buffer_unlock(struct ring_buffer *buffer, unsigned long flags)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	int cpu;
+
+	for (cpu = buffer->cpus - 1; cpu >= 0; cpu--) {
+		if (!cpu_isset(cpu, buffer->cpumask))
+			continue;
+		cpu_buffer = buffer->buffers[cpu];
+		spin_unlock(&cpu_buffer->lock);
+	}
+
+	local_irq_restore(flags);
+}
+
+/**
+ * ring_buffer_record_disable - stop all writes into the buffer
+ * @buffer: The ring buffer to stop writes to.
+ *
+ * This prevents all writes to the buffer. Any attempt to write
+ * to the buffer after this will fail and return NULL.
+ *
+ * The caller should call synchronize_sched() after this.
+ */
+void ring_buffer_record_disable(struct ring_buffer *buffer)
+{
+	atomic_inc(&buffer->record_disabled);
+}
+
+/**
+ * ring_buffer_record_enable - enable writes to the buffer
+ * @buffer: The ring buffer to enable writes
+ *
+ * Note, multiple disables will need the same number of enables
+ * to truely enable the writing (much like preempt_disable).
+ */
+void ring_buffer_record_enable(struct ring_buffer *buffer)
+{
+	atomic_dec(&buffer->record_disabled);
+}
+
+/**
+ * ring_buffer_record_disable_cpu - stop all writes into the cpu_buffer
+ * @buffer: The ring buffer to stop writes to.
+ * @cpu: The CPU buffer to stop
+ *
+ * This prevents all writes to the buffer. Any attempt to write
+ * to the buffer after this will fail and return NULL.
+ *
+ * The caller should call synchronize_sched() after this.
+ */
+void ring_buffer_record_disable_cpu(struct ring_buffer *buffer, int cpu)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		return;
+
+	cpu_buffer = buffer->buffers[cpu];
+	atomic_inc(&cpu_buffer->record_disabled);
+}
+
+/**
+ * ring_buffer_record_enable_cpu - enable writes to the buffer
+ * @buffer: The ring buffer to enable writes
+ * @cpu: The CPU to enable.
+ *
+ * Note, multiple disables will need the same number of enables
+ * to truely enable the writing (much like preempt_disable).
+ */
+void ring_buffer_record_enable_cpu(struct ring_buffer *buffer, int cpu)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		return;
+
+	cpu_buffer = buffer->buffers[cpu];
+	atomic_dec(&cpu_buffer->record_disabled);
+}
+
+/**
+ * ring_buffer_entries_cpu - get the number of entries in a cpu buffer
+ * @buffer: The ring buffer
+ * @cpu: The per CPU buffer to get the entries from.
+ */
+unsigned long ring_buffer_entries_cpu(struct ring_buffer *buffer, int cpu)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		return 0;
+
+	cpu_buffer = buffer->buffers[cpu];
+	return cpu_buffer->entries;
+}
+
+/**
+ * ring_buffer_overrun_cpu - get the number of overruns in a cpu_buffer
+ * @buffer: The ring buffer
+ * @cpu: The per CPU buffer to get the number of overruns from
+ */
+unsigned long ring_buffer_overrun_cpu(struct ring_buffer *buffer, int cpu)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		return 0;
+
+	cpu_buffer = buffer->buffers[cpu];
+	return cpu_buffer->overrun;
+}
+
+/**
+ * ring_buffer_entries - get the number of entries in a buffer
+ * @buffer: The ring buffer
+ *
+ * Returns the total number of entries in the ring buffer
+ * (all CPU entries)
+ */
+unsigned long ring_buffer_entries(struct ring_buffer *buffer)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	unsigned long entries = 0;
+	int cpu;
+
+	/* if you care about this being correct, lock the buffer */
+	for_each_buffer_cpu(buffer, cpu) {
+		cpu_buffer = buffer->buffers[cpu];
+		entries += cpu_buffer->entries;
+	}
+
+	return entries;
+}
+
+/**
+ * ring_buffer_overrun_cpu - get the number of overruns in buffer
+ * @buffer: The ring buffer
+ *
+ * Returns the total number of overruns in the ring buffer
+ * (all CPU entries)
+ */
+unsigned long ring_buffer_overruns(struct ring_buffer *buffer)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	unsigned long overruns = 0;
+	int cpu;
+
+	/* if you care about this being correct, lock the buffer */
+	for_each_buffer_cpu(buffer, cpu) {
+		cpu_buffer = buffer->buffers[cpu];
+		overruns += cpu_buffer->overrun;
+	}
+
+	return overruns;
+}
+
+/**
+ * ring_buffer_iter_reset - reset an iterator
+ * @iter: The iterator to reset
+ *
+ * Resets the iterator, so that it will start from the beginning
+ * again.
+ */
+void ring_buffer_iter_reset(struct ring_buffer_iter *iter)
+{
+	struct ring_buffer_per_cpu *cpu_buffer = iter->cpu_buffer;
+
+	iter->head_page = cpu_buffer->head_page;
+	iter->head = cpu_buffer->head;
+	rb_reset_iter_read_page(iter);
+}
+
+/**
+ * ring_buffer_iter_empty - check if an iterator has no more to read
+ * @iter: The iterator to check
+ */
+int ring_buffer_iter_empty(struct ring_buffer_iter *iter)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+
+	cpu_buffer = iter->cpu_buffer;
+
+	return iter->head_page == cpu_buffer->tail_page &&
+		iter->head == cpu_buffer->tail;
+}
+
+static void
+rb_update_read_stamp(struct ring_buffer_per_cpu *cpu_buffer,
+		     struct ring_buffer_event *event)
+{
+	u64 delta;
+
+	switch (event->type) {
+	case RINGBUF_TYPE_PADDING:
+		return;
+
+	case RINGBUF_TYPE_TIME_EXTEND:
+		delta = event->array[0];
+		delta <<= TS_SHIFT;
+		delta += event->time_delta;
+		cpu_buffer->read_stamp += delta;
+		return;
+
+	case RINGBUF_TYPE_TIME_STAMP:
+		/* FIXME: not implemented */
+		return;
+
+	case RINGBUF_TYPE_DATA:
+		cpu_buffer->read_stamp += event->time_delta;
+		return;
+
+	default:
+		BUG();
+	}
+	return;
+}
+
+static void
+rb_update_iter_read_stamp(struct ring_buffer_iter *iter,
+			  struct ring_buffer_event *event)
+{
+	u64 delta;
+
+	switch (event->type) {
+	case RINGBUF_TYPE_PADDING:
+		return;
+
+	case RINGBUF_TYPE_TIME_EXTEND:
+		delta = event->array[0];
+		delta <<= TS_SHIFT;
+		delta += event->time_delta;
+		iter->read_stamp += delta;
+		return;
+
+	case RINGBUF_TYPE_TIME_STAMP:
+		/* FIXME: not implemented */
+		return;
+
+	case RINGBUF_TYPE_DATA:
+		iter->read_stamp += event->time_delta;
+		return;
+
+	default:
+		BUG();
+	}
+	return;
+}
+
+static void rb_advance_head(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	struct ring_buffer_event *event;
+	unsigned length;
+
+	/*
+	 * Check if we are at the end of the buffer.
+	 */
+	if (cpu_buffer->head >= cpu_buffer->head_page->size) {
+		BUG_ON(cpu_buffer->head_page == cpu_buffer->tail_page);
+		rb_inc_page(cpu_buffer, &cpu_buffer->head_page);
+		rb_reset_read_page(cpu_buffer);
+		return;
+	}
+
+	event = rb_head_event(cpu_buffer);
+
+	if (event->type == RINGBUF_TYPE_DATA)
+		cpu_buffer->entries--;
+
+	length = rb_event_length(event);
+
+	/*
+	 * This should not be called to advance the header if we are
+	 * at the tail of the buffer.
+	 */
+	BUG_ON((cpu_buffer->head_page == cpu_buffer->tail_page) &&
+	       (cpu_buffer->head + length > cpu_buffer->tail));
+
+	rb_update_read_stamp(cpu_buffer, event);
+
+	cpu_buffer->head += length;
+
+	/* check for end of page */
+	if ((cpu_buffer->head >= cpu_buffer->head_page->size) &&
+	    (cpu_buffer->head_page != cpu_buffer->tail_page))
+		rb_advance_head(cpu_buffer);
+}
+
+static void rb_advance_iter(struct ring_buffer_iter *iter)
+{
+	struct ring_buffer *buffer;
+	struct ring_buffer_per_cpu *cpu_buffer;
+	struct ring_buffer_event *event;
+	unsigned length;
+
+	cpu_buffer = iter->cpu_buffer;
+	buffer = cpu_buffer->buffer;
+
+	/*
+	 * Check if we are at the end of the buffer.
+	 */
+	if (iter->head >= iter->head_page->size) {
+		BUG_ON(iter->head_page == cpu_buffer->tail_page);
+		rb_inc_page(cpu_buffer, &iter->head_page);
+		rb_reset_iter_read_page(iter);
+		return;
+	}
+
+	event = rb_iter_head_event(iter);
+
+	length = rb_event_length(event);
+
+	/*
+	 * This should not be called to advance the header if we are
+	 * at the tail of the buffer.
+	 */
+	BUG_ON((iter->head_page == cpu_buffer->tail_page) &&
+	       (iter->head + length > cpu_buffer->tail));
+
+	rb_update_iter_read_stamp(iter, event);
+
+	iter->head += length;
+
+	/* check for end of page padding */
+	if ((iter->head >= iter->head_page->size) &&
+	    (iter->head_page != cpu_buffer->tail_page))
+		rb_advance_iter(iter);
+}
+
+/**
+ * ring_buffer_peek - peek at the next event to be read
+ * @buffer: The ring buffer to read
+ * @cpu: The cpu to peak at
+ * @ts: The timestamp counter of this event.
+ *
+ * This will return the event that will be read next, but does
+ * not consume the data.
+ */
+struct ring_buffer_event *
+ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	struct ring_buffer_event *event;
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		return NULL;
+
+	cpu_buffer = buffer->buffers[cpu];
+
+ again:
+	if (rb_per_cpu_empty(cpu_buffer))
+		return NULL;
+
+	event = rb_head_event(cpu_buffer);
+
+	switch (event->type) {
+	case RINGBUF_TYPE_PADDING:
+		rb_inc_page(cpu_buffer, &cpu_buffer->head_page);
+		rb_reset_read_page(cpu_buffer);
+		goto again;
+
+	case RINGBUF_TYPE_TIME_EXTEND:
+		/* Internal data, OK to advance */
+		rb_advance_head(cpu_buffer);
+		goto again;
+
+	case RINGBUF_TYPE_TIME_STAMP:
+		/* FIXME: not implemented */
+		rb_advance_head(cpu_buffer);
+		goto again;
+
+	case RINGBUF_TYPE_DATA:
+		if (ts) {
+			*ts = cpu_buffer->read_stamp + event->time_delta;
+			ring_buffer_normalize_time_stamp(cpu_buffer->cpu, ts);
+		}
+		return event;
+
+	default:
+		BUG();
+	}
+
+	return NULL;
+}
+
+/**
+ * ring_buffer_iter_peek - peek at the next event to be read
+ * @iter: The ring buffer iterator
+ * @ts: The timestamp counter of this event.
+ *
+ * This will return the event that will be read next, but does
+ * not increment the iterator.
+ */
+struct ring_buffer_event *
+ring_buffer_iter_peek(struct ring_buffer_iter *iter, u64 *ts)
+{
+	struct ring_buffer *buffer;
+	struct ring_buffer_per_cpu *cpu_buffer;
+	struct ring_buffer_event *event;
+
+	if (ring_buffer_iter_empty(iter))
+		return NULL;
+
+	cpu_buffer = iter->cpu_buffer;
+	buffer = cpu_buffer->buffer;
+
+ again:
+	if (rb_per_cpu_empty(cpu_buffer))
+		return NULL;
+
+	event = rb_iter_head_event(iter);
+
+	switch (event->type) {
+	case RINGBUF_TYPE_PADDING:
+		rb_inc_page(cpu_buffer, &iter->head_page);
+		rb_reset_iter_read_page(iter);
+		goto again;
+
+	case RINGBUF_TYPE_TIME_EXTEND:
+		/* Internal data, OK to advance */
+		rb_advance_iter(iter);
+		goto again;
+
+	case RINGBUF_TYPE_TIME_STAMP:
+		/* FIXME: not implemented */
+		rb_advance_iter(iter);
+		goto again;
+
+	case RINGBUF_TYPE_DATA:
+		if (ts) {
+			*ts = iter->read_stamp + event->time_delta;
+			ring_buffer_normalize_time_stamp(cpu_buffer->cpu, ts);
+		}
+		return event;
+
+	default:
+		BUG();
+	}
+
+	return NULL;
+}
+
+/**
+ * ring_buffer_consume - return an event and consume it
+ * @buffer: The ring buffer to get the next event from
+ *
+ * Returns the next event in the ring buffer, and that event is consumed.
+ * Meaning, that sequential reads will keep returning a different event,
+ * and eventually empty the ring buffer if the producer is slower.
+ */
+struct ring_buffer_event *
+ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	struct ring_buffer_event *event;
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		return NULL;
+
+	event = ring_buffer_peek(buffer, cpu, ts);
+	if (!event)
+		return NULL;
+
+	cpu_buffer = buffer->buffers[cpu];
+	rb_advance_head(cpu_buffer);
+
+	return event;
+}
+
+/**
+ * ring_buffer_read_start - start a non consuming read of the buffer
+ * @buffer: The ring buffer to read from
+ * @cpu: The cpu buffer to iterate over
+ *
+ * This starts up an iteration through the buffer. It also disables
+ * the recording to the buffer until the reading is finished.
+ * This prevents the reading from being corrupted. This is not
+ * a consuming read, so a producer is not expected.
+ *
+ * Must be paired with ring_buffer_finish.
+ */
+struct ring_buffer_iter *
+ring_buffer_read_start(struct ring_buffer *buffer, int cpu)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	struct ring_buffer_iter *iter;
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		return NULL;
+
+	iter = kmalloc(sizeof(*iter), GFP_KERNEL);
+	if (!iter)
+		return NULL;
+
+	cpu_buffer = buffer->buffers[cpu];
+
+	iter->cpu_buffer = cpu_buffer;
+
+	atomic_inc(&cpu_buffer->record_disabled);
+	synchronize_sched();
+
+	spin_lock(&cpu_buffer->lock);
+	iter->head = cpu_buffer->head;
+	iter->head_page = cpu_buffer->head_page;
+	rb_reset_iter_read_page(iter);
+	spin_unlock(&cpu_buffer->lock);
+
+	return iter;
+}
+
+/**
+ * ring_buffer_finish - finish reading the iterator of the buffer
+ * @iter: The iterator retrieved by ring_buffer_start
+ *
+ * This re-enables the recording to the buffer, and frees the
+ * iterator.
+ */
+void
+ring_buffer_read_finish(struct ring_buffer_iter *iter)
+{
+	struct ring_buffer_per_cpu *cpu_buffer = iter->cpu_buffer;
+
+	atomic_dec(&cpu_buffer->record_disabled);
+	kfree(iter);
+}
+
+/**
+ * ring_buffer_read - read the next item in the ring buffer by the iterator
+ * @iter: The ring buffer iterator
+ * @ts: The time stamp of the event read.
+ *
+ * This reads the next event in the ring buffer and increments the iterator.
+ */
+struct ring_buffer_event *
+ring_buffer_read(struct ring_buffer_iter *iter, u64 *ts)
+{
+	struct ring_buffer_event *event;
+
+	event = ring_buffer_iter_peek(iter, ts);
+	if (!event)
+		return NULL;
+
+	rb_advance_iter(iter);
+
+	return event;
+}
+
+/**
+ * ring_buffer_size - return the size of the ring buffer (in bytes)
+ * @buffer: The ring buffer.
+ */
+unsigned long ring_buffer_size(struct ring_buffer *buffer)
+{
+	return BUF_PAGE_SIZE * buffer->pages;
+}
+
+static void
+rb_reset_cpu(struct ring_buffer_per_cpu *cpu_buffer)
+{
+	cpu_buffer->head_page
+		= list_entry(cpu_buffer->pages.next, struct buffer_page, list);
+	cpu_buffer->tail_page
+		= list_entry(cpu_buffer->pages.next, struct buffer_page, list);
+
+	cpu_buffer->head = cpu_buffer->tail = 0;
+	cpu_buffer->overrun = 0;
+	cpu_buffer->entries = 0;
+}
+
+/**
+ * ring_buffer_reset_cpu - reset a ring buffer per CPU buffer
+ * @buffer: The ring buffer to reset a per cpu buffer of
+ * @cpu: The CPU buffer to be reset
+ */
+void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu)
+{
+	struct ring_buffer_per_cpu *cpu_buffer = buffer->buffers[cpu];
+	unsigned long flags;
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		return;
+
+	raw_local_irq_save(flags);
+	spin_lock(&cpu_buffer->lock);
+
+	rb_reset_cpu(cpu_buffer);
+
+	spin_unlock(&cpu_buffer->lock);
+	raw_local_irq_restore(flags);
+}
+
+/**
+ * ring_buffer_reset - reset a ring buffer
+ * @buffer: The ring buffer to reset all cpu buffers
+ */
+void ring_buffer_reset(struct ring_buffer *buffer)
+{
+	unsigned long flags;
+	int cpu;
+
+	ring_buffer_lock(buffer, &flags);
+
+	for_each_buffer_cpu(buffer, cpu)
+		rb_reset_cpu(buffer->buffers[cpu]);
+
+	ring_buffer_unlock(buffer, flags);
+}
+
+/**
+ * rind_buffer_empty - is the ring buffer empty?
+ * @buffer: The ring buffer to test
+ */
+int ring_buffer_empty(struct ring_buffer *buffer)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+	int cpu;
+
+	/* yes this is racy, but if you don't like the race, lock the buffer */
+	for_each_buffer_cpu(buffer, cpu) {
+		cpu_buffer = buffer->buffers[cpu];
+		if (!rb_per_cpu_empty(cpu_buffer))
+			return 0;
+	}
+	return 1;
+}
+
+/**
+ * ring_buffer_empty_cpu - is a cpu buffer of a ring buffer empty?
+ * @buffer: The ring buffer
+ * @cpu: The CPU buffer to test
+ */
+int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
+{
+	struct ring_buffer_per_cpu *cpu_buffer;
+
+	if (!cpu_isset(cpu, buffer->cpumask))
+		return 1;
+
+	cpu_buffer = buffer->buffers[cpu];
+	return rb_per_cpu_empty(cpu_buffer);
+}
+
+/**
+ * ring_buffer_swap_cpu - swap a CPU buffer between two ring buffers
+ * @buffer_a: One buffer to swap with
+ * @buffer_b: The other buffer to swap with
+ *
+ * This function is useful for tracers that want to take a "snapshot"
+ * of a CPU buffer and has another back up buffer lying around.
+ * it is expected that the tracer handles the cpu buffer not being
+ * used at the moment.
+ */
+int ring_buffer_swap_cpu(struct ring_buffer *buffer_a,
+			 struct ring_buffer *buffer_b, int cpu)
+{
+	struct ring_buffer_per_cpu *cpu_buffer_a;
+	struct ring_buffer_per_cpu *cpu_buffer_b;
+
+	if (!cpu_isset(cpu, buffer_a->cpumask) ||
+	    !cpu_isset(cpu, buffer_b->cpumask))
+		return -EINVAL;
+
+	/* At least make sure the two buffers are somewhat the same */
+	if (buffer_a->size != buffer_b->size ||
+	    buffer_a->pages != buffer_b->pages)
+		return -EINVAL;
+
+	cpu_buffer_a = buffer_a->buffers[cpu];
+	cpu_buffer_b = buffer_b->buffers[cpu];
+
+	/*
+	 * We can't do a synchronize_sched here because this
+	 * function can be called in atomic context.
+	 * Normally this will be called from the same CPU as cpu.
+	 * If not it's up to the caller to protect this.
+	 */
+	atomic_inc(&cpu_buffer_a->record_disabled);
+	atomic_inc(&cpu_buffer_b->record_disabled);
+
+	buffer_a->buffers[cpu] = cpu_buffer_b;
+	buffer_b->buffers[cpu] = cpu_buffer_a;
+
+	cpu_buffer_b->buffer = buffer_a;
+	cpu_buffer_a->buffer = buffer_b;
+
+	atomic_dec(&cpu_buffer_a->record_disabled);
+	atomic_dec(&cpu_buffer_b->record_disabled);
+
+	return 0;
+}
+
Index: linux-tip.git/kernel/trace/Kconfig
===================================================================
--- linux-tip.git.orig/kernel/trace/Kconfig	2008-09-24 10:39:29.000000000 -0400
+++ linux-tip.git/kernel/trace/Kconfig	2008-09-29 12:50:26.000000000 -0400
@@ -18,9 +18,13 @@ config HAVE_FTRACE_MCOUNT_RECORD
 config TRACER_MAX_TRACE
 	bool
 
+config RING_BUFFER
+	bool
+
 config TRACING
 	bool
 	select DEBUG_FS
+	select RING_BUFFER
 	select STACKTRACE
 	select TRACEPOINTS
 
Index: linux-tip.git/kernel/trace/Makefile
===================================================================
--- linux-tip.git.orig/kernel/trace/Makefile	2008-09-24 10:39:29.000000000 -0400
+++ linux-tip.git/kernel/trace/Makefile	2008-09-29 12:49:46.000000000 -0400
@@ -11,6 +11,7 @@ obj-y += trace_selftest_dynamic.o
 endif
 
 obj-$(CONFIG_FTRACE) += libftrace.o
+obj-$(CONFIG_RING_BUFFER) += ring_buffer.o
 
 obj-$(CONFIG_TRACING) += trace.o
 obj-$(CONFIG_CONTEXT_SWITCH_TRACER) += trace_sched_switch.o

-- 

Re: [PATCH 2/6] Unified trace buffer

[Ingo Molnar]

* Steven Rostedt <rostedt@goodmis.org> wrote:

> +void ring_buffer_lock(struct ring_buffer *buffer, unsigned long *flags)
> +{
> +	struct ring_buffer_per_cpu *cpu_buffer;
> +	int cpu;
> +
> +	local_irq_save(*flags);
> +
> +	for_each_buffer_cpu(buffer, cpu) {
> +		cpu_buffer = buffer->buffers[cpu];
> +		spin_lock(&cpu_buffer->lock);
> +	}
> +}

hm, that's rather unintelligent and needs to be fixed.

	Ingo

Re: [PATCH 2/6] Unified trace buffer

[Ingo Molnar]

a third type of lockdep splat surfaced in -tip testing:

=============================================
[ INFO: possible recursive locking detected ]
2.6.27-rc8-tip #37560
---------------------------------------------
swapper/0 is trying to acquire lock:
 (&cpu_buffer->lock){.+..}, at: [<ffffffff802906ac>] ring_buffer_lock+0x46/0x5e

but task is already holding lock:
 (&cpu_buffer->lock){.+..}, at: [<ffffffff802906ac>] ring_buffer_lock+0x46/0x5e

other info that might help us debug this:
2 locks held by swapper/0:
 #0:  (&rq->lock){++..}, at: [<ffffffff80754540>] schedule+0x16f/0x839
 #1:  (&cpu_buffer->lock){.+..}, at: [<ffffffff802906ac>] ring_buffer_lock+0x46/0x5e

stack backtrace:
Pid: 0, comm: swapper Not tainted 2.6.27-rc8-tip #37560
Call Trace:
 [<ffffffff802743b6>] __lock_acquire+0xb2a/0x116f
 [<ffffffff80274a88>] lock_acquire+0x8d/0xba
 [<ffffffff802906ac>] ring_buffer_lock+0x46/0x5e
 [<ffffffff80756b7c>] _spin_lock+0x29/0x34
 [<ffffffff802906ac>] ring_buffer_lock+0x46/0x5e
 [<ffffffff8039d992>] __next_cpu+0x19/0x28
 [<ffffffff802906ac>] ring_buffer_lock+0x46/0x5e
 [<ffffffff80290762>] ring_buffer_reset+0x1c/0x58
 [<ffffffff802942b9>] update_max_tr+0x5f/0x7f
 [<ffffffff802954e0>] probe_wakeup_sched_switch+0x175/0x189
 [<ffffffff80754aa8>] schedule+0x6d7/0x839
 [<ffffffff80273de2>] __lock_acquire+0x556/0x116f
 [<ffffffff807567bb>] trace_hardirqs_on_thunk+0x3a/0x3f
 [<ffffffff802732c8>] trace_hardirqs_on_caller+0xb4/0xd7
 [<ffffffff807567bb>] trace_hardirqs_on_thunk+0x3a/0x3f
 [<ffffffff80269ea4>] ktime_get_ts+0x21/0x4a
 [<ffffffff8026c44f>] getnstimeofday+0x38/0x98
 [<ffffffff80269ea4>] ktime_get_ts+0x21/0x4a
 [<ffffffff80227fc8>] native_sched_clock+0x8c/0xa6
 [<ffffffff8026b485>] sched_clock_tick+0x78/0x80
 [<ffffffff8027020f>] tick_nohz_restart_sched_tick+0x16b/0x178
 [<ffffffff802732c8>] trace_hardirqs_on_caller+0xb4/0xd7
 [<ffffffff8021fd70>] cpu_idle+0x77/0x79
driver: '2-0:1.0': driver_bound: bound to device 'hub'

	Ingo

Re: [PATCH 2/6] Unified trace buffer

[Steven Rostedt]

On Tue, 30 Sep 2008, Ingo Molnar wrote:

> 
> * Steven Rostedt <rostedt@goodmis.org> wrote:
> 
> > +void ring_buffer_lock(struct ring_buffer *buffer, unsigned long *flags)
> > +{
> > +	struct ring_buffer_per_cpu *cpu_buffer;
> > +	int cpu;
> > +
> > +	local_irq_save(*flags);
> > +
> > +	for_each_buffer_cpu(buffer, cpu) {
> > +		cpu_buffer = buffer->buffers[cpu];
> > +		spin_lock(&cpu_buffer->lock);
> > +	}
> > +}
> 
> hm, that's rather unintelligent and needs to be fixed.

hm, why?  It is ordered locking based on the cpu value. This is exactly 
what ftrace did as well.  The unlock even goes backwards max_cpu to 0.

But version 2 of this code will drop both ring_buffer_lock and unlock, but 
that will come later.

-- Steve

[PATCH 3/6] ring_buffer: add paranoid check for buffer page

[Steven Rostedt]

[-- Attachment #1: ring-buffer-paranoid-buffer-page-check.patch --]
[-- Type: text/plain, Size: 1447 bytes --]

If for some strange reason the buffer_page gets bigger, or the page struct
gets smaller, I want to know this ASAP.  The best way is to not let the
kernel compile.

This patch adds code to test the size of the struct buffer_page against the
page struct and will cause compile issues if the buffer_page ever gets bigger
than the page struct.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 kernel/trace/ring_buffer.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

Index: linux-tip.git/kernel/trace/ring_buffer.c
===================================================================
--- linux-tip.git.orig/kernel/trace/ring_buffer.c	2008-09-29 17:31:05.000000000 -0400
+++ linux-tip.git/kernel/trace/ring_buffer.c	2008-09-29 19:59:24.000000000 -0400
@@ -289,6 +289,12 @@ static void rb_free_cpu_buffer(struct ri
 	kfree(cpu_buffer);
 }
 
+/*
+ * Causes compile errors if the struct buffer_page gets bigger
+ * than the struct page.
+ */
+extern int ring_buffer_page_too_big(void);
+
 /**
  * ring_buffer_alloc - allocate a new ring_buffer
  * @size: the size in bytes that is needed.
@@ -305,6 +311,11 @@ struct ring_buffer *ring_buffer_alloc(un
 	int bsize;
 	int cpu;
 
+	/* Paranoid! Optimizes out when all is well */
+	if (sizeof(struct buffer_page) > sizeof(struct page))
+		ring_buffer_page_too_big();
+
+
 	/* keep it in its own cache line */
 	buffer = kzalloc(ALIGN(sizeof(*buffer), cache_line_size()),
 			 GFP_KERNEL);

-- 

[PATCH 4/6] ring_buffer: reset buffer page when freeing

[Steven Rostedt]

[-- Attachment #1: ring-buffer-page-freeing.patch --]
[-- Type: text/plain, Size: 2008 bytes --]

Mathieu Desnoyers pointed out that the freeing of the page frame needs
to be reset otherwise we might trigger BUG_ON in the page free code.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 kernel/trace/ring_buffer.c |   19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

Index: linux-tip.git/kernel/trace/ring_buffer.c
===================================================================
--- linux-tip.git.orig/kernel/trace/ring_buffer.c	2008-09-29 19:59:24.000000000 -0400
+++ linux-tip.git/kernel/trace/ring_buffer.c	2008-09-29 20:07:32.000000000 -0400
@@ -128,6 +128,17 @@ struct buffer_page {
 };
 
 /*
+ * Also stolen from mm/slob.c. Thanks to Mathieu Desnoyers for pointing
+ * this issue out.
+ */
+static inline void free_buffer_page(struct buffer_page *bpage)
+{
+	reset_page_mapcount(&bpage->page);
+	bpage->page.mapping = NULL;
+	__free_page(&bpage->page);
+}
+
+/*
  * We need to fit the time_stamp delta into 27 bits.
  */
 static inline int test_time_stamp(u64 delta)
@@ -240,7 +251,7 @@ static int rb_allocate_pages(struct ring
  free_pages:
 	list_for_each_entry_safe(page, tmp, &pages, list) {
 		list_del_init(&page->list);
-		__free_page(&page->page);
+		free_buffer_page(page);
 	}
 	return -ENOMEM;
 }
@@ -284,7 +295,7 @@ static void rb_free_cpu_buffer(struct ri
 
 	list_for_each_entry_safe(page, tmp, head, list) {
 		list_del_init(&page->list);
-		__free_page(&page->page);
+		free_buffer_page(page);
 	}
 	kfree(cpu_buffer);
 }
@@ -393,7 +404,7 @@ rb_remove_pages(struct ring_buffer_per_c
 		p = cpu_buffer->pages.next;
 		page = list_entry(p, struct buffer_page, list);
 		list_del_init(&page->list);
-		__free_page(&page->page);
+		free_buffer_page(page);
 	}
 	BUG_ON(list_empty(&cpu_buffer->pages));
 
@@ -520,7 +531,7 @@ int ring_buffer_resize(struct ring_buffe
  free_pages:
 	list_for_each_entry_safe(page, tmp, &pages, list) {
 		list_del_init(&page->list);
-		__free_page(&page->page);
+		free_buffer_page(page);
 	}
 	return -ENOMEM;
 }

-- 

[PATCH 5/6] ftrace: make work with new ring buffer

[Steven Rostedt]

[-- Attachment #1: ftrace-port-to-ring-buffer.patch --]
[-- Type: text/plain, Size: 55675 bytes --]

This patch ports ftrace over to the new ring buffer.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 kernel/trace/trace.c              |  932 +++++++++-----------------------------
 kernel/trace/trace.h              |   22 
 kernel/trace/trace_boot.c         |   16 
 kernel/trace/trace_functions.c    |    2 
 kernel/trace/trace_irqsoff.c      |    6 
 kernel/trace/trace_mmiotrace.c    |   40 -
 kernel/trace/trace_nop.c          |    2 
 kernel/trace/trace_sched_switch.c |    2 
 kernel/trace/trace_sched_wakeup.c |    2 
 kernel/trace/trace_selftest.c     |   60 --
 kernel/trace/trace_sysprof.c      |    2 
 11 files changed, 288 insertions(+), 798 deletions(-)

Index: linux-tip.git/kernel/trace/trace.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace.c	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace.c	2008-09-29 22:28:11.000000000 -0400
@@ -33,25 +33,22 @@
 #include <linux/writeback.h>
 
 #include <linux/stacktrace.h>
+#include <linux/ring_buffer.h>
 
 #include "trace.h"
 
+#define TRACE_BUFFER_FLAGS	(RB_FL_OVERWRITE)
+
 unsigned long __read_mostly	tracing_max_latency = (cycle_t)ULONG_MAX;
 unsigned long __read_mostly	tracing_thresh;
 
-static unsigned long __read_mostly	tracing_nr_buffers;
 static cpumask_t __read_mostly		tracing_buffer_mask;
 
 #define for_each_tracing_cpu(cpu)	\
 	for_each_cpu_mask(cpu, tracing_buffer_mask)
 
-static int trace_alloc_page(void);
-static int trace_free_page(void);
-
 static int tracing_disabled = 1;
 
-static unsigned long tracing_pages_allocated;
-
 long
 ns2usecs(cycle_t nsec)
 {
@@ -62,7 +59,9 @@ ns2usecs(cycle_t nsec)
 
 cycle_t ftrace_now(int cpu)
 {
-	return cpu_clock(cpu);
+	u64 ts = ring_buffer_time_stamp(cpu);
+	ring_buffer_normalize_time_stamp(cpu, &ts);
+	return ts;
 }
 
 /*
@@ -102,18 +101,18 @@ static int			tracer_enabled = 1;
 int				ftrace_function_enabled;
 
 /*
- * trace_nr_entries is the number of entries that is allocated
- * for a buffer. Note, the number of entries is always rounded
- * to ENTRIES_PER_PAGE.
+ * trace_buf_size is the size in bytes that is allocated
+ * for a buffer. Note, the number of bytes is always rounded
+ * to page size.
  *
  * This number is purposely set to a low number of 16384.
  * If the dump on oops happens, it will be much appreciated
  * to not have to wait for all that output. Anyway this can be
  * boot time and run time configurable.
  */
-#define TRACE_ENTRIES_DEFAULT	16384UL
+#define TRACE_BUF_SIZE_DEFAULT	1441792UL /* 16384 * 88 (sizeof(entry)) */
 
-static unsigned long		trace_nr_entries = TRACE_ENTRIES_DEFAULT;
+static unsigned long		trace_buf_size = TRACE_BUF_SIZE_DEFAULT;
 
 /* trace_types holds a link list of available tracers. */
 static struct tracer		*trace_types __read_mostly;
@@ -158,23 +157,21 @@ void trace_wake_up(void)
 		wake_up(&trace_wait);
 }
 
-#define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(struct trace_entry))
-
-static int __init set_nr_entries(char *str)
+static int __init set_buf_size(char *str)
 {
-	unsigned long nr_entries;
+	unsigned long buf_size;
 	int ret;
 
 	if (!str)
 		return 0;
-	ret = strict_strtoul(str, 0, &nr_entries);
+	ret = strict_strtoul(str, 0, &buf_size);
 	/* nr_entries can not be zero */
-	if (ret < 0 || nr_entries == 0)
+	if (ret < 0 || buf_size == 0)
 		return 0;
-	trace_nr_entries = nr_entries;
+	trace_buf_size = buf_size;
 	return 1;
 }
-__setup("trace_entries=", set_nr_entries);
+__setup("trace_buf_size=", set_buf_size);
 
 unsigned long nsecs_to_usecs(unsigned long nsecs)
 {
@@ -243,54 +240,6 @@ __update_max_tr(struct trace_array *tr, 
 	tracing_record_cmdline(current);
 }
 
-#define CHECK_COND(cond)			\
-	if (unlikely(cond)) {			\
-		tracing_disabled = 1;		\
-		WARN_ON(1);			\
-		return -1;			\
-	}
-
-/**
- * check_pages - integrity check of trace buffers
- *
- * As a safty measure we check to make sure the data pages have not
- * been corrupted.
- */
-int check_pages(struct trace_array_cpu *data)
-{
-	struct page *page, *tmp;
-
-	CHECK_COND(data->trace_pages.next->prev != &data->trace_pages);
-	CHECK_COND(data->trace_pages.prev->next != &data->trace_pages);
-
-	list_for_each_entry_safe(page, tmp, &data->trace_pages, lru) {
-		CHECK_COND(page->lru.next->prev != &page->lru);
-		CHECK_COND(page->lru.prev->next != &page->lru);
-	}
-
-	return 0;
-}
-
-/**
- * head_page - page address of the first page in per_cpu buffer.
- *
- * head_page returns the page address of the first page in
- * a per_cpu buffer. This also preforms various consistency
- * checks to make sure the buffer has not been corrupted.
- */
-void *head_page(struct trace_array_cpu *data)
-{
-	struct page *page;
-
-	if (list_empty(&data->trace_pages))
-		return NULL;
-
-	page = list_entry(data->trace_pages.next, struct page, lru);
-	BUG_ON(&page->lru == &data->trace_pages);
-
-	return page_address(page);
-}
-
 /**
  * trace_seq_printf - sequence printing of trace information
  * @s: trace sequence descriptor
@@ -437,34 +386,6 @@ trace_print_seq(struct seq_file *m, stru
 	trace_seq_reset(s);
 }
 
-/*
- * flip the trace buffers between two trace descriptors.
- * This usually is the buffers between the global_trace and
- * the max_tr to record a snapshot of a current trace.
- *
- * The ftrace_max_lock must be held.
- */
-static void
-flip_trace(struct trace_array_cpu *tr1, struct trace_array_cpu *tr2)
-{
-	struct list_head flip_pages;
-
-	INIT_LIST_HEAD(&flip_pages);
-
-	memcpy(&tr1->trace_head_idx, &tr2->trace_head_idx,
-		sizeof(struct trace_array_cpu) -
-		offsetof(struct trace_array_cpu, trace_head_idx));
-
-	check_pages(tr1);
-	check_pages(tr2);
-	list_splice_init(&tr1->trace_pages, &flip_pages);
-	list_splice_init(&tr2->trace_pages, &tr1->trace_pages);
-	list_splice_init(&flip_pages, &tr2->trace_pages);
-	BUG_ON(!list_empty(&flip_pages));
-	check_pages(tr1);
-	check_pages(tr2);
-}
-
 /**
  * update_max_tr - snapshot all trace buffers from global_trace to max_tr
  * @tr: tracer
@@ -477,17 +398,15 @@ flip_trace(struct trace_array_cpu *tr1, 
 void
 update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
 {
-	struct trace_array_cpu *data;
-	int i;
+	struct ring_buffer *buf = tr->buffer;
 
 	WARN_ON_ONCE(!irqs_disabled());
 	__raw_spin_lock(&ftrace_max_lock);
-	/* clear out all the previous traces */
-	for_each_tracing_cpu(i) {
-		data = tr->data[i];
-		flip_trace(max_tr.data[i], data);
-		tracing_reset(data);
-	}
+
+	tr->buffer = max_tr.buffer;
+	max_tr.buffer = buf;
+
+	ring_buffer_reset(tr->buffer);
 
 	__update_max_tr(tr, tsk, cpu);
 	__raw_spin_unlock(&ftrace_max_lock);
@@ -504,16 +423,15 @@ update_max_tr(struct trace_array *tr, st
 void
 update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu)
 {
-	struct trace_array_cpu *data = tr->data[cpu];
-	int i;
+	int ret;
 
 	WARN_ON_ONCE(!irqs_disabled());
 	__raw_spin_lock(&ftrace_max_lock);
-	for_each_tracing_cpu(i)
-		tracing_reset(max_tr.data[i]);
 
-	flip_trace(max_tr.data[cpu], data);
-	tracing_reset(data);
+	ring_buffer_reset(max_tr.buffer);
+	ret = ring_buffer_swap_cpu(max_tr.buffer, tr->buffer, cpu);
+
+	WARN_ON_ONCE(ret);
 
 	__update_max_tr(tr, tsk, cpu);
 	__raw_spin_unlock(&ftrace_max_lock);
@@ -550,7 +468,6 @@ int register_tracer(struct tracer *type)
 #ifdef CONFIG_FTRACE_STARTUP_TEST
 	if (type->selftest) {
 		struct tracer *saved_tracer = current_trace;
-		struct trace_array_cpu *data;
 		struct trace_array *tr = &global_trace;
 		int saved_ctrl = tr->ctrl;
 		int i;
@@ -562,10 +479,7 @@ int register_tracer(struct tracer *type)
 		 * If we fail, we do not register this tracer.
 		 */
 		for_each_tracing_cpu(i) {
-			data = tr->data[i];
-			if (!head_page(data))
-				continue;
-			tracing_reset(data);
+			tracing_reset(tr, i);
 		}
 		current_trace = type;
 		tr->ctrl = 0;
@@ -581,10 +495,7 @@ int register_tracer(struct tracer *type)
 		}
 		/* Only reset on passing, to avoid touching corrupted buffers */
 		for_each_tracing_cpu(i) {
-			data = tr->data[i];
-			if (!head_page(data))
-				continue;
-			tracing_reset(data);
+			tracing_reset(tr, i);
 		}
 		printk(KERN_CONT "PASSED\n");
 	}
@@ -630,13 +541,9 @@ void unregister_tracer(struct tracer *ty
 	mutex_unlock(&trace_types_lock);
 }
 
-void tracing_reset(struct trace_array_cpu *data)
+void tracing_reset(struct trace_array *tr, int cpu)
 {
-	data->trace_idx = 0;
-	data->overrun = 0;
-	data->trace_head = data->trace_tail = head_page(data);
-	data->trace_head_idx = 0;
-	data->trace_tail_idx = 0;
+	ring_buffer_reset_cpu(tr->buffer, cpu);
 }
 
 #define SAVED_CMDLINES 128
@@ -722,70 +629,6 @@ void tracing_record_cmdline(struct task_
 	trace_save_cmdline(tsk);
 }
 
-static inline struct list_head *
-trace_next_list(struct trace_array_cpu *data, struct list_head *next)
-{
-	/*
-	 * Roundrobin - but skip the head (which is not a real page):
-	 */
-	next = next->next;
-	if (unlikely(next == &data->trace_pages))
-		next = next->next;
-	BUG_ON(next == &data->trace_pages);
-
-	return next;
-}
-
-static inline void *
-trace_next_page(struct trace_array_cpu *data, void *addr)
-{
-	struct list_head *next;
-	struct page *page;
-
-	page = virt_to_page(addr);
-
-	next = trace_next_list(data, &page->lru);
-	page = list_entry(next, struct page, lru);
-
-	return page_address(page);
-}
-
-struct trace_entry *
-tracing_get_trace_entry(struct trace_array *tr, struct trace_array_cpu *data)
-{
-	unsigned long idx, idx_next;
-	struct trace_entry *entry;
-
-	data->trace_idx++;
-	idx = data->trace_head_idx;
-	idx_next = idx + 1;
-
-	BUG_ON(idx * TRACE_ENTRY_SIZE >= PAGE_SIZE);
-
-	entry = data->trace_head + idx * TRACE_ENTRY_SIZE;
-
-	if (unlikely(idx_next >= ENTRIES_PER_PAGE)) {
-		data->trace_head = trace_next_page(data, data->trace_head);
-		idx_next = 0;
-	}
-
-	if (data->trace_head == data->trace_tail &&
-	    idx_next == data->trace_tail_idx) {
-		/* overrun */
-		data->overrun++;
-		data->trace_tail_idx++;
-		if (data->trace_tail_idx >= ENTRIES_PER_PAGE) {
-			data->trace_tail =
-				trace_next_page(data, data->trace_tail);
-			data->trace_tail_idx = 0;
-		}
-	}
-
-	data->trace_head_idx = idx_next;
-
-	return entry;
-}
-
 void
 tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags)
 {
@@ -796,7 +639,6 @@ tracing_generic_entry_update(struct trac
 
 	entry->field.preempt_count	= pc & 0xff;
 	entry->field.pid		= (tsk) ? tsk->pid : 0;
-	entry->field.t			= ftrace_now(raw_smp_processor_id());
 	entry->field.flags =
 		(irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
 		((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) |
@@ -808,18 +650,20 @@ void
 trace_function(struct trace_array *tr, struct trace_array_cpu *data,
 	       unsigned long ip, unsigned long parent_ip, unsigned long flags)
 {
+	struct ring_buffer_event *event;
 	struct trace_entry *entry;
 	unsigned long irq_flags;
 
-	raw_local_irq_save(irq_flags);
-	__raw_spin_lock(&data->lock);
-	entry				= tracing_get_trace_entry(tr, data);
+	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+					 &irq_flags);
+	if (!event)
+		return;
+	entry	= ring_buffer_event_data(event);
 	tracing_generic_entry_update(entry, flags);
 	entry->type			= TRACE_FN;
 	entry->field.fn.ip		= ip;
 	entry->field.fn.parent_ip	= parent_ip;
-	__raw_spin_unlock(&data->lock);
-	raw_local_irq_restore(irq_flags);
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 }
 
 void
@@ -835,13 +679,19 @@ void __trace_stack(struct trace_array *t
 		   unsigned long flags,
 		   int skip)
 {
+	struct ring_buffer_event *event;
 	struct trace_entry *entry;
 	struct stack_trace trace;
+	unsigned long irq_flags;
 
 	if (!(trace_flags & TRACE_ITER_STACKTRACE))
 		return;
 
-	entry			= tracing_get_trace_entry(tr, data);
+	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+					 &irq_flags);
+	if (!event)
+		return;
+	entry	= ring_buffer_event_data(event);
 	tracing_generic_entry_update(entry, flags);
 	entry->type		= TRACE_STACK;
 
@@ -853,28 +703,31 @@ void __trace_stack(struct trace_array *t
 	trace.entries		= entry->field.stack.caller;
 
 	save_stack_trace(&trace);
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 }
 
 void
 __trace_special(void *__tr, void *__data,
 		unsigned long arg1, unsigned long arg2, unsigned long arg3)
 {
+	struct ring_buffer_event *event;
 	struct trace_array_cpu *data = __data;
 	struct trace_array *tr = __tr;
 	struct trace_entry *entry;
 	unsigned long irq_flags;
 
-	raw_local_irq_save(irq_flags);
-	__raw_spin_lock(&data->lock);
-	entry				= tracing_get_trace_entry(tr, data);
+	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+					 &irq_flags);
+	if (!event)
+		return;
+	entry	= ring_buffer_event_data(event);
 	tracing_generic_entry_update(entry, 0);
 	entry->type			= TRACE_SPECIAL;
 	entry->field.special.arg1	= arg1;
 	entry->field.special.arg2	= arg2;
 	entry->field.special.arg3	= arg3;
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 	__trace_stack(tr, data, irq_flags, 4);
-	__raw_spin_unlock(&data->lock);
-	raw_local_irq_restore(irq_flags);
 
 	trace_wake_up();
 }
@@ -886,12 +739,15 @@ tracing_sched_switch_trace(struct trace_
 			   struct task_struct *next,
 			   unsigned long flags)
 {
+	struct ring_buffer_event *event;
 	struct trace_entry *entry;
 	unsigned long irq_flags;
 
-	raw_local_irq_save(irq_flags);
-	__raw_spin_lock(&data->lock);
-	entry				= tracing_get_trace_entry(tr, data);
+	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+					   &irq_flags);
+	if (!event)
+		return;
+	entry	= ring_buffer_event_data(event);
 	tracing_generic_entry_update(entry, flags);
 	entry->type			= TRACE_CTX;
 	entry->field.ctx.prev_pid	= prev->pid;
@@ -901,9 +757,8 @@ tracing_sched_switch_trace(struct trace_
 	entry->field.ctx.next_prio	= next->prio;
 	entry->field.ctx.next_state	= next->state;
 	entry->field.ctx.next_cpu	= task_cpu(next);
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 	__trace_stack(tr, data, flags, 5);
-	__raw_spin_unlock(&data->lock);
-	raw_local_irq_restore(irq_flags);
 }
 
 void
@@ -913,12 +768,15 @@ tracing_sched_wakeup_trace(struct trace_
 			   struct task_struct *curr,
 			   unsigned long flags)
 {
+	struct ring_buffer_event *event;
 	struct trace_entry *entry;
 	unsigned long irq_flags;
 
-	raw_local_irq_save(irq_flags);
-	__raw_spin_lock(&data->lock);
-	entry			= tracing_get_trace_entry(tr, data);
+	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+					   &irq_flags);
+	if (!event)
+		return;
+	entry	= ring_buffer_event_data(event);
 	tracing_generic_entry_update(entry, flags);
 	entry->type		= TRACE_WAKE;
 	entry->field.ctx.prev_pid	= curr->pid;
@@ -928,9 +786,8 @@ tracing_sched_wakeup_trace(struct trace_
 	entry->field.ctx.next_prio	= wakee->prio;
 	entry->field.ctx.next_state	= wakee->state;
 	entry->field.ctx.next_cpu	= task_cpu(wakee);
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 	__trace_stack(tr, data, flags, 6);
-	__raw_spin_unlock(&data->lock);
-	raw_local_irq_restore(irq_flags);
 
 	trace_wake_up();
 }
@@ -1011,183 +868,77 @@ enum trace_file_type {
 	TRACE_FILE_LAT_FMT	= 1,
 };
 
-/* Return the current entry.  */
-static struct trace_entry *
-trace_entry_idx(struct trace_array *tr, struct trace_array_cpu *data,
-		struct trace_iterator *iter, int cpu)
-{
-	struct page *page;
-	struct trace_entry *array;
-
-	if (iter->next_idx[cpu] >= tr->entries ||
-	    iter->next_idx[cpu] >= data->trace_idx ||
-	    (data->trace_head == data->trace_tail &&
-	     data->trace_head_idx == data->trace_tail_idx))
-		return NULL;
-
-	if (!iter->next_page[cpu]) {
-		/* Initialize the iterator for this cpu trace buffer */
-		WARN_ON(!data->trace_tail);
-		page = virt_to_page(data->trace_tail);
-		iter->next_page[cpu] = &page->lru;
-		iter->next_page_idx[cpu] = data->trace_tail_idx;
-	}
-
-	page = list_entry(iter->next_page[cpu], struct page, lru);
-	BUG_ON(&data->trace_pages == &page->lru);
-
-	array = page_address(page);
-
-	WARN_ON(iter->next_page_idx[cpu] >= ENTRIES_PER_PAGE);
-	return &array[iter->next_page_idx[cpu]];
-}
-
-/* Increment the index counter of an iterator by one */
-static void __trace_iterator_increment(struct trace_iterator *iter, int cpu)
-{
-	iter->next_idx[cpu]++;
-	iter->next_page_idx[cpu]++;
-
-	if (iter->next_page_idx[cpu] >= ENTRIES_PER_PAGE) {
-		struct trace_array_cpu *data = iter->tr->data[cpu];
-
-		iter->next_page_idx[cpu] = 0;
-		iter->next_page[cpu] =
-			trace_next_list(data, iter->next_page[cpu]);
-	}
-}
-
 static void trace_iterator_increment(struct trace_iterator *iter, int cpu)
 {
 	iter->idx++;
-	__trace_iterator_increment(iter, cpu);
+	ring_buffer_read(iter->buffer_iter[iter->cpu], NULL);
 }
 
 static struct trace_entry *
-trace_entry_next(struct trace_array *tr, struct trace_array_cpu *data,
-		 struct trace_iterator *iter, int cpu)
+peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts)
 {
-	struct list_head *next_page;
-	struct trace_entry *ent;
-	int idx, next_idx, next_page_idx;
+	struct ring_buffer_event *event;
+	struct ring_buffer_iter *buf_iter = iter->buffer_iter[cpu];
 
-	ent = trace_entry_idx(tr, tr->data[cpu], iter, cpu);
-
-	if (likely(!ent || ent->type != TRACE_CONT))
-		return ent;
-
-	/* save the iterator details */
-	idx		= iter->idx;
-	next_idx	= iter->next_idx[cpu];
-	next_page_idx	= iter->next_page_idx[cpu];
-	next_page	= iter->next_page[cpu];
-
-	/* find a real entry */
-	do {
-		__trace_iterator_increment(iter, cpu);
-		ent = trace_entry_idx(tr, tr->data[cpu], iter, cpu);
-	} while (ent && ent->type != TRACE_CONT);
-
-	/* reset the iterator */
-	iter->idx			= idx;
-	iter->next_idx[cpu]		= next_idx;
-	iter->next_page_idx[cpu]	= next_page_idx;
-	iter->next_page[cpu]		= next_page;
-
-	return ent;
+	event = ring_buffer_iter_peek(buf_iter, ts);
+	return event ? ring_buffer_event_data(event) : NULL;
 }
-
 static struct trace_entry *
-__find_next_entry(struct trace_iterator *iter, int *ent_cpu, int inc)
+__find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
 {
-	struct trace_array *tr = iter->tr;
+	struct ring_buffer *buffer = iter->tr->buffer;
 	struct trace_entry *ent, *next = NULL;
+	u64 next_ts = 0, ts;
 	int next_cpu = -1;
 	int cpu;
 
 	for_each_tracing_cpu(cpu) {
-		if (!head_page(tr->data[cpu]))
-			continue;
-
-		ent = trace_entry_idx(tr, tr->data[cpu], iter, cpu);
 
-		if (ent && ent->type == TRACE_CONT) {
-			struct trace_array_cpu *data = tr->data[cpu];
+		if (ring_buffer_empty_cpu(buffer, cpu))
+			continue;
 
-			if (!inc)
-				ent = trace_entry_next(tr, data, iter, cpu);
-			else {
-				while (ent && ent->type == TRACE_CONT) {
-					__trace_iterator_increment(iter, cpu);
-					ent = trace_entry_idx(tr, tr->data[cpu],
-							      iter, cpu);
-				}
-			}
-		}
+		ent = peek_next_entry(iter, cpu, &ts);
 
 		/*
 		 * Pick the entry with the smallest timestamp:
 		 */
-		if (ent && (!next || ent->field.t < next->field.t)) {
+		if (ent && (!next || ts < next_ts)) {
 			next = ent;
 			next_cpu = cpu;
+			next_ts = ts;
 		}
 	}
 
 	if (ent_cpu)
 		*ent_cpu = next_cpu;
 
+	if (ent_ts)
+		*ent_ts = next_ts;
+
 	return next;
 }
 
 /* Find the next real entry, without updating the iterator itself */
 static struct trace_entry *
-find_next_entry(struct trace_iterator *iter, int *ent_cpu)
+find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
 {
-	return __find_next_entry(iter, ent_cpu, 0);
+	return __find_next_entry(iter, ent_cpu, ent_ts);
 }
 
 /* Find the next real entry, and increment the iterator to the next entry */
 static void *find_next_entry_inc(struct trace_iterator *iter)
 {
-	struct trace_entry *next;
-	int next_cpu = -1;
-
-	next = __find_next_entry(iter, &next_cpu, 1);
-
-	iter->prev_ent = iter->ent;
-	iter->prev_cpu = iter->cpu;
+	iter->ent = __find_next_entry(iter, &iter->cpu, &iter->ts);
 
-	iter->ent = next;
-	iter->cpu = next_cpu;
-
-	if (next)
+	if (iter->ent)
 		trace_iterator_increment(iter, iter->cpu);
 
-	return next ? iter : NULL;
+	return iter->ent ? iter : NULL;
 }
 
 static void trace_consume(struct trace_iterator *iter)
 {
-	struct trace_array_cpu *data = iter->tr->data[iter->cpu];
-	struct trace_entry *ent;
-
- again:
-	data->trace_tail_idx++;
-	if (data->trace_tail_idx >= ENTRIES_PER_PAGE) {
-		data->trace_tail = trace_next_page(data, data->trace_tail);
-		data->trace_tail_idx = 0;
-	}
-
-	/* Check if we empty it, then reset the index */
-	if (data->trace_head == data->trace_tail &&
-	    data->trace_head_idx == data->trace_tail_idx)
-		data->trace_idx = 0;
-
-	ent = trace_entry_idx(iter->tr, iter->tr->data[iter->cpu],
-			      iter, iter->cpu);
-	if (ent && ent->type == TRACE_CONT)
-		goto again;
+	ring_buffer_consume(iter->tr->buffer, iter->cpu, &iter->ts);
 }
 
 static void *s_next(struct seq_file *m, void *v, loff_t *pos)
@@ -1220,7 +971,7 @@ static void *s_start(struct seq_file *m,
 	struct trace_iterator *iter = m->private;
 	void *p = NULL;
 	loff_t l = 0;
-	int i;
+	int cpu;
 
 	mutex_lock(&trace_types_lock);
 
@@ -1239,12 +990,9 @@ static void *s_start(struct seq_file *m,
 		iter->ent = NULL;
 		iter->cpu = 0;
 		iter->idx = -1;
-		iter->prev_ent = NULL;
-		iter->prev_cpu = -1;
 
-		for_each_tracing_cpu(i) {
-			iter->next_idx[i] = 0;
-			iter->next_page[i] = NULL;
+		for_each_tracing_cpu(cpu) {
+			ring_buffer_iter_reset(iter->buffer_iter[cpu]);
 		}
 
 		for (p = iter; p && l < *pos; p = s_next(m, p, &l))
@@ -1365,23 +1113,16 @@ print_trace_header(struct seq_file *m, s
 	struct trace_array *tr = iter->tr;
 	struct trace_array_cpu *data = tr->data[tr->cpu];
 	struct tracer *type = current_trace;
-	unsigned long total   = 0;
-	unsigned long entries = 0;
-	int cpu;
+	unsigned long total;
+	unsigned long entries;
 	const char *name = "preemption";
 
 	if (type)
 		name = type->name;
 
-	for_each_tracing_cpu(cpu) {
-		if (head_page(tr->data[cpu])) {
-			total += tr->data[cpu]->trace_idx;
-			if (tr->data[cpu]->trace_idx > tr->entries)
-				entries += tr->entries;
-			else
-				entries += tr->data[cpu]->trace_idx;
-		}
-	}
+	entries = ring_buffer_entries(iter->tr->buffer);
+	total = entries +
+		ring_buffer_overruns(iter->tr->buffer);
 
 	seq_printf(m, "%s latency trace v1.1.5 on %s\n",
 		   name, UTS_RELEASE);
@@ -1468,7 +1209,7 @@ lat_print_generic(struct trace_seq *s, s
 unsigned long preempt_mark_thresh = 100;
 
 static void
-lat_print_timestamp(struct trace_seq *s, unsigned long long abs_usecs,
+lat_print_timestamp(struct trace_seq *s, u64 abs_usecs,
 		    unsigned long rel_usecs)
 {
 	trace_seq_printf(s, " %4lldus", abs_usecs);
@@ -1488,12 +1229,10 @@ static const char state_to_char[] = TASK
  */
 void trace_seq_print_cont(struct trace_seq *s, struct trace_iterator *iter)
 {
-	struct trace_array *tr = iter->tr;
-	struct trace_array_cpu *data = tr->data[iter->cpu];
 	struct trace_entry *ent;
 	bool ok = true;
 
-	ent = trace_entry_idx(tr, data, iter, iter->cpu);
+	ent = peek_next_entry(iter, iter->cpu, NULL);
 	if (!ent || ent->type != TRACE_CONT) {
 		trace_seq_putc(s, '\n');
 		return;
@@ -1502,8 +1241,8 @@ void trace_seq_print_cont(struct trace_s
 	do {
 		if (ok)
 			ok = (trace_seq_printf(s, "%s", ent->cont.buf) > 0);
-		__trace_iterator_increment(iter, iter->cpu);
-		ent = trace_entry_idx(tr, data, iter, iter->cpu);
+		ring_buffer_read(iter->buffer_iter[iter->cpu], NULL);
+		ent = peek_next_entry(iter, iter->cpu, NULL);
 	} while (ent && ent->type == TRACE_CONT);
 
 	if (!ok)
@@ -1515,25 +1254,26 @@ print_lat_fmt(struct trace_iterator *ite
 {
 	struct trace_seq *s = &iter->seq;
 	unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
-	struct trace_entry *next_entry = find_next_entry(iter, NULL);
+	struct trace_entry *next_entry;
 	unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
 	struct trace_entry *entry = iter->ent;
 	struct trace_field *field = &entry->field;
 	unsigned long abs_usecs;
 	unsigned long rel_usecs;
+	u64 next_ts;
 	char *comm;
 	int S, T;
 	int i;
 	unsigned state;
 
-	if (!next_entry)
-		next_entry = entry;
-
 	if (entry->type == TRACE_CONT)
 		return 1;
 
-	rel_usecs = ns2usecs(next_entry->field.t - entry->field.t);
-	abs_usecs = ns2usecs(entry->field.t - iter->tr->time_start);
+	next_entry = find_next_entry(iter, NULL, &next_ts);
+	if (!next_entry)
+		next_ts = iter->ts;
+	rel_usecs = ns2usecs(next_ts - iter->ts);
+	abs_usecs = ns2usecs(iter->ts - iter->tr->time_start);
 
 	if (verbose) {
 		comm = trace_find_cmdline(field->pid);
@@ -1542,7 +1282,7 @@ print_lat_fmt(struct trace_iterator *ite
 				 comm,
 				 field->pid, cpu, field->flags,
 				 field->preempt_count, trace_idx,
-				 ns2usecs(field->t),
+				 ns2usecs(iter->ts),
 				 abs_usecs/1000,
 				 abs_usecs % 1000, rel_usecs/1000,
 				 rel_usecs % 1000);
@@ -1627,7 +1367,7 @@ static int print_trace_fmt(struct trace_
 
 	comm = trace_find_cmdline(iter->ent->field.pid);
 
-	t = ns2usecs(field->t);
+	t = ns2usecs(iter->ts);
 	usec_rem = do_div(t, 1000000ULL);
 	secs = (unsigned long)t;
 
@@ -1732,7 +1472,7 @@ static int print_raw_fmt(struct trace_it
 	field = &entry->field;
 
 	ret = trace_seq_printf(s, "%d %d %llu ",
-		field->pid, iter->cpu, field->t);
+		field->pid, iter->cpu, iter->ts);
 	if (!ret)
 		return 0;
 
@@ -1811,7 +1551,7 @@ static int print_hex_fmt(struct trace_it
 
 	SEQ_PUT_HEX_FIELD_RET(s, field->pid);
 	SEQ_PUT_HEX_FIELD_RET(s, iter->cpu);
-	SEQ_PUT_HEX_FIELD_RET(s, field->t);
+	SEQ_PUT_HEX_FIELD_RET(s, iter->ts);
 
 	switch (entry->type) {
 	case TRACE_FN:
@@ -1861,7 +1601,7 @@ static int print_bin_fmt(struct trace_it
 
 	SEQ_PUT_FIELD_RET(s, field->pid);
 	SEQ_PUT_FIELD_RET(s, field->cpu);
-	SEQ_PUT_FIELD_RET(s, field->t);
+	SEQ_PUT_FIELD_RET(s, iter->ts);
 
 	switch (entry->type) {
 	case TRACE_FN:
@@ -1888,15 +1628,10 @@ static int print_bin_fmt(struct trace_it
 
 static int trace_empty(struct trace_iterator *iter)
 {
-	struct trace_array_cpu *data;
 	int cpu;
 
 	for_each_tracing_cpu(cpu) {
-		data = iter->tr->data[cpu];
-
-		if (head_page(data) && data->trace_idx &&
-		    (data->trace_tail != data->trace_head ||
-		     data->trace_tail_idx != data->trace_head_idx))
+		if (!ring_buffer_iter_empty(iter->buffer_iter[cpu]))
 			return 0;
 	}
 	return 1;
@@ -1961,6 +1696,8 @@ static struct trace_iterator *
 __tracing_open(struct inode *inode, struct file *file, int *ret)
 {
 	struct trace_iterator *iter;
+	struct seq_file *m;
+	int cpu;
 
 	if (tracing_disabled) {
 		*ret = -ENODEV;
@@ -1981,28 +1718,43 @@ __tracing_open(struct inode *inode, stru
 	iter->trace = current_trace;
 	iter->pos = -1;
 
+	for_each_tracing_cpu(cpu) {
+		iter->buffer_iter[cpu] =
+			ring_buffer_read_start(iter->tr->buffer, cpu);
+		if (!iter->buffer_iter[cpu])
+			goto fail_buffer;
+	}
+
 	/* TODO stop tracer */
 	*ret = seq_open(file, &tracer_seq_ops);
-	if (!*ret) {
-		struct seq_file *m = file->private_data;
-		m->private = iter;
+	if (*ret)
+		goto fail_buffer;
 
-		/* stop the trace while dumping */
-		if (iter->tr->ctrl) {
-			tracer_enabled = 0;
-			ftrace_function_enabled = 0;
-		}
+	m = file->private_data;
+	m->private = iter;
 
-		if (iter->trace && iter->trace->open)
-			iter->trace->open(iter);
-	} else {
-		kfree(iter);
-		iter = NULL;
+	/* stop the trace while dumping */
+	if (iter->tr->ctrl) {
+		tracer_enabled = 0;
+		ftrace_function_enabled = 0;
 	}
+
+	if (iter->trace && iter->trace->open)
+			iter->trace->open(iter);
+
 	mutex_unlock(&trace_types_lock);
 
  out:
 	return iter;
+
+ fail_buffer:
+	for_each_tracing_cpu(cpu) {
+		if (iter->buffer_iter[cpu])
+			ring_buffer_read_finish(iter->buffer_iter[cpu]);
+	}
+	mutex_unlock(&trace_types_lock);
+
+	return ERR_PTR(-ENOMEM);
 }
 
 int tracing_open_generic(struct inode *inode, struct file *filp)
@@ -2018,8 +1770,14 @@ int tracing_release(struct inode *inode,
 {
 	struct seq_file *m = (struct seq_file *)file->private_data;
 	struct trace_iterator *iter = m->private;
+	int cpu;
 
 	mutex_lock(&trace_types_lock);
+	for_each_tracing_cpu(cpu) {
+		if (iter->buffer_iter[cpu])
+			ring_buffer_read_finish(iter->buffer_iter[cpu]);
+	}
+
 	if (iter->trace && iter->trace->close)
 		iter->trace->close(iter);
 
@@ -2526,6 +2284,7 @@ static atomic_t tracing_reader;
 static int tracing_open_pipe(struct inode *inode, struct file *filp)
 {
 	struct trace_iterator *iter;
+	int cpu;
 
 	if (tracing_disabled)
 		return -ENODEV;
@@ -2546,17 +2305,38 @@ static int tracing_open_pipe(struct inod
 	iter->trace = current_trace;
 	filp->private_data = iter;
 
+	for_each_tracing_cpu(cpu) {
+		iter->buffer_iter[cpu] =
+			ring_buffer_read_start(iter->tr->buffer, cpu);
+		if (!iter->buffer_iter[cpu])
+			goto fail_buffer;
+	}
+
 	if (iter->trace->pipe_open)
 		iter->trace->pipe_open(iter);
 	mutex_unlock(&trace_types_lock);
 
 	return 0;
+
+ fail_buffer:
+	for_each_tracing_cpu(cpu) {
+		if (iter->buffer_iter[cpu])
+			ring_buffer_read_finish(iter->buffer_iter[cpu]);
+	}
+	mutex_unlock(&trace_types_lock);
+
+	return -ENOMEM;
 }
 
 static int tracing_release_pipe(struct inode *inode, struct file *file)
 {
 	struct trace_iterator *iter = file->private_data;
+	int cpu;
 
+	for_each_tracing_cpu(cpu) {
+		if (iter->buffer_iter[cpu])
+			ring_buffer_read_finish(iter->buffer_iter[cpu]);
+	}
 	kfree(iter);
 	atomic_dec(&tracing_reader);
 
@@ -2592,13 +2372,10 @@ tracing_read_pipe(struct file *filp, cha
 		  size_t cnt, loff_t *ppos)
 {
 	struct trace_iterator *iter = filp->private_data;
-	struct trace_array_cpu *data;
-	static cpumask_t mask;
 	unsigned long flags;
 #ifdef CONFIG_FTRACE
 	int ftrace_save;
 #endif
-	int cpu;
 	ssize_t sret;
 
 	/* return any leftover data */
@@ -2687,32 +2464,13 @@ tracing_read_pipe(struct file *filp, cha
 	 * and then release the locks again.
 	 */
 
-	cpus_clear(mask);
-	local_irq_save(flags);
+	local_irq_disable();
 #ifdef CONFIG_FTRACE
 	ftrace_save = ftrace_enabled;
 	ftrace_enabled = 0;
 #endif
 	smp_wmb();
-	for_each_tracing_cpu(cpu) {
-		data = iter->tr->data[cpu];
-
-		if (!head_page(data) || !data->trace_idx)
-			continue;
-
-		atomic_inc(&data->disabled);
-		cpu_set(cpu, mask);
-	}
-
-	for_each_cpu_mask(cpu, mask) {
-		data = iter->tr->data[cpu];
-		__raw_spin_lock(&data->lock);
-
-		if (data->overrun > iter->last_overrun[cpu])
-			iter->overrun[cpu] +=
-				data->overrun - iter->last_overrun[cpu];
-		iter->last_overrun[cpu] = data->overrun;
-	}
+	ring_buffer_lock(iter->tr->buffer, &flags);
 
 	while (find_next_entry_inc(iter) != NULL) {
 		int ret;
@@ -2731,19 +2489,11 @@ tracing_read_pipe(struct file *filp, cha
 			break;
 	}
 
-	for_each_cpu_mask(cpu, mask) {
-		data = iter->tr->data[cpu];
-		__raw_spin_unlock(&data->lock);
-	}
-
-	for_each_cpu_mask(cpu, mask) {
-		data = iter->tr->data[cpu];
-		atomic_dec(&data->disabled);
-	}
+	ring_buffer_unlock(iter->tr->buffer, flags);
 #ifdef CONFIG_FTRACE
 	ftrace_enabled = ftrace_save;
 #endif
-	local_irq_restore(flags);
+	local_irq_enable();
 
 	/* Now copy what we have to the user */
 	sret = trace_seq_to_user(&iter->seq, ubuf, cnt);
@@ -2776,7 +2526,7 @@ tracing_entries_write(struct file *filp,
 {
 	unsigned long val;
 	char buf[64];
-	int i, ret;
+	int ret;
 	struct trace_array *tr = filp->private_data;
 
 	if (cnt >= sizeof(buf))
@@ -2804,52 +2554,31 @@ tracing_entries_write(struct file *filp,
 		goto out;
 	}
 
-	if (val > global_trace.entries) {
-		long pages_requested;
-		unsigned long freeable_pages;
-
-		/* make sure we have enough memory before mapping */
-		pages_requested =
-			(val + (ENTRIES_PER_PAGE-1)) / ENTRIES_PER_PAGE;
-
-		/* account for each buffer (and max_tr) */
-		pages_requested *= tracing_nr_buffers * 2;
-
-		/* Check for overflow */
-		if (pages_requested < 0) {
-			cnt = -ENOMEM;
-			goto out;
-		}
-
-		freeable_pages = determine_dirtyable_memory();
-
-		/* we only allow to request 1/4 of useable memory */
-		if (pages_requested >
-		    ((freeable_pages + tracing_pages_allocated) / 4)) {
-			cnt = -ENOMEM;
+	if (val != global_trace.entries) {
+		ret = ring_buffer_resize(global_trace.buffer, val);
+		if (ret < 0) {
+			cnt = ret;
 			goto out;
 		}
 
-		while (global_trace.entries < val) {
-			if (trace_alloc_page()) {
-				cnt = -ENOMEM;
-				goto out;
+		ret = ring_buffer_resize(max_tr.buffer, val);
+		if (ret < 0) {
+			int r;
+			cnt = ret;
+			r = ring_buffer_resize(global_trace.buffer,
+					       global_trace.entries);
+			if (r < 0) {
+				/* AARGH! We are left with different
+				 * size max buffer!!!! */
+				WARN_ON(1);
+				tracing_disabled = 1;
 			}
-			/* double check that we don't go over the known pages */
-			if (tracing_pages_allocated > pages_requested)
-				break;
+			goto out;
 		}
 
-	} else {
-		/* include the number of entries in val (inc of page entries) */
-		while (global_trace.entries > val + (ENTRIES_PER_PAGE - 1))
-			trace_free_page();
+		global_trace.entries = val;
 	}
 
-	/* check integrity */
-	for_each_tracing_cpu(i)
-		check_pages(global_trace.data[i]);
-
 	filp->f_pos += cnt;
 
 	/* If check pages failed, return ENOMEM */
@@ -3086,10 +2815,11 @@ int trace_vprintk(unsigned long ip, cons
 	static DEFINE_SPINLOCK(trace_buf_lock);
 	static char trace_buf[TRACE_BUF_SIZE];
 
+	struct ring_buffer_event *event;
 	struct trace_array *tr = &global_trace;
 	struct trace_array_cpu *data;
 	struct trace_entry *entry;
-	unsigned long flags;
+	unsigned long flags, irq_flags;
 	long disabled;
 	int cpu, len = 0, write, written = 0;
 
@@ -3110,8 +2840,11 @@ int trace_vprintk(unsigned long ip, cons
 	len = min(len, TRACE_BUF_SIZE-1);
 	trace_buf[len] = 0;
 
-	__raw_spin_lock(&data->lock);
-	entry				= tracing_get_trace_entry(tr, data);
+	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+					 &irq_flags);
+	if (!event)
+		goto out_unlock;
+	entry	= ring_buffer_event_data(event);
 	tracing_generic_entry_update(entry, flags);
 	entry->type			= TRACE_PRINT;
 	entry->field.print.ip		= ip;
@@ -3121,21 +2854,27 @@ int trace_vprintk(unsigned long ip, cons
 	memcpy(&entry->field.print.buf, trace_buf, write);
 	entry->field.print.buf[write] = 0;
 	written = write;
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 
 	if (written != len)
 		entry->field.flags |= TRACE_FLAG_CONT;
 
 	while (written != len) {
-		entry = tracing_get_trace_entry(tr, data);
+		event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+						 &irq_flags);
+		if (!event)
+			goto out_unlock;
+		entry	= ring_buffer_event_data(event);
 
 		entry->type = TRACE_CONT;
 		write = min(len - written, (int)(TRACE_CONT_BUF_SIZE-1));
 		memcpy(&entry->cont.buf, trace_buf+written, write);
 		entry->cont.buf[write] = 0;
 		written += write;
+		ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 	}
-	__raw_spin_unlock(&data->lock);
 
+ out_unlock:
 	spin_unlock(&trace_buf_lock);
 
  out:
@@ -3227,12 +2966,10 @@ void ftrace_dump(void)
 	static DEFINE_SPINLOCK(ftrace_dump_lock);
 	/* use static because iter can be a bit big for the stack */
 	static struct trace_iterator iter;
-	struct trace_array_cpu *data;
 	static cpumask_t mask;
 	static int dump_ran;
-	unsigned long flags;
+	unsigned long flags, irq_flags;
 	int cnt = 0;
-	int cpu;
 
 	/* only one dump */
 	spin_lock_irqsave(&ftrace_dump_lock, flags);
@@ -3258,25 +2995,7 @@ void ftrace_dump(void)
 
 	cpus_clear(mask);
 
-	for_each_tracing_cpu(cpu) {
-		data = iter.tr->data[cpu];
-
-		if (!head_page(data) || !data->trace_idx)
-			continue;
-
-		atomic_inc(&data->disabled);
-		cpu_set(cpu, mask);
-	}
-
-	for_each_cpu_mask(cpu, mask) {
-		data = iter.tr->data[cpu];
-		__raw_spin_lock(&data->lock);
-
-		if (data->overrun > iter.last_overrun[cpu])
-			iter.overrun[cpu] +=
-				data->overrun - iter.last_overrun[cpu];
-		iter.last_overrun[cpu] = data->overrun;
-	}
+	ring_buffer_lock(iter.tr->buffer, &irq_flags);
 
 	while (!trace_empty(&iter)) {
 
@@ -3305,205 +3024,47 @@ void ftrace_dump(void)
 	else
 		printk(KERN_TRACE "---------------------------------\n");
 
-	for_each_cpu_mask(cpu, mask) {
-		data = iter.tr->data[cpu];
-		__raw_spin_unlock(&data->lock);
-	}
-
-	for_each_cpu_mask(cpu, mask) {
-		data = iter.tr->data[cpu];
-		atomic_dec(&data->disabled);
-	}
-
+	ring_buffer_unlock(iter.tr->buffer, irq_flags);
 
  out:
 	spin_unlock_irqrestore(&ftrace_dump_lock, flags);
 }
 
-static int trace_alloc_page(void)
+__init static int tracer_alloc_buffers(void)
 {
 	struct trace_array_cpu *data;
-	struct page *page, *tmp;
-	LIST_HEAD(pages);
-	void *array;
-	unsigned pages_allocated = 0;
 	int i;
 
-	/* first allocate a page for each CPU */
-	for_each_tracing_cpu(i) {
-		array = (void *)__get_free_page(GFP_KERNEL);
-		if (array == NULL) {
-			printk(KERN_ERR "tracer: failed to allocate page"
-			       "for trace buffer!\n");
-			goto free_pages;
-		}
-
-		pages_allocated++;
-		page = virt_to_page(array);
-		list_add(&page->lru, &pages);
+	/* TODO: make the number of buffers hot pluggable with CPUS */
+	tracing_buffer_mask = cpu_possible_map;
 
-/* Only allocate if we are actually using the max trace */
-#ifdef CONFIG_TRACER_MAX_TRACE
-		array = (void *)__get_free_page(GFP_KERNEL);
-		if (array == NULL) {
-			printk(KERN_ERR "tracer: failed to allocate page"
-			       "for trace buffer!\n");
-			goto free_pages;
-		}
-		pages_allocated++;
-		page = virt_to_page(array);
-		list_add(&page->lru, &pages);
-#endif
+	global_trace.buffer = ring_buffer_alloc(trace_buf_size,
+						   TRACE_BUFFER_FLAGS);
+	if (!global_trace.buffer) {
+		printk(KERN_ERR "tracer: failed to allocate ring buffer!\n");
+		WARN_ON(1);
+		return 0;
 	}
-
-	/* Now that we successfully allocate a page per CPU, add them */
-	for_each_tracing_cpu(i) {
-		data = global_trace.data[i];
-		page = list_entry(pages.next, struct page, lru);
-		list_del_init(&page->lru);
-		list_add_tail(&page->lru, &data->trace_pages);
-		ClearPageLRU(page);
+	global_trace.entries = ring_buffer_size(global_trace.buffer);
 
 #ifdef CONFIG_TRACER_MAX_TRACE
-		data = max_tr.data[i];
-		page = list_entry(pages.next, struct page, lru);
-		list_del_init(&page->lru);
-		list_add_tail(&page->lru, &data->trace_pages);
-		SetPageLRU(page);
-#endif
-	}
-	tracing_pages_allocated += pages_allocated;
-	global_trace.entries += ENTRIES_PER_PAGE;
-
-	return 0;
-
- free_pages:
-	list_for_each_entry_safe(page, tmp, &pages, lru) {
-		list_del_init(&page->lru);
-		__free_page(page);
+	max_tr.buffer = ring_buffer_alloc(trace_buf_size,
+					     TRACE_BUFFER_FLAGS);
+	if (!max_tr.buffer) {
+		printk(KERN_ERR "tracer: failed to allocate max ring buffer!\n");
+		WARN_ON(1);
+		ring_buffer_free(global_trace.buffer);
+		return 0;
 	}
-	return -ENOMEM;
-}
-
-static int trace_free_page(void)
-{
-	struct trace_array_cpu *data;
-	struct page *page;
-	struct list_head *p;
-	int i;
-	int ret = 0;
-
-	/* free one page from each buffer */
-	for_each_tracing_cpu(i) {
-		data = global_trace.data[i];
-		p = data->trace_pages.next;
-		if (p == &data->trace_pages) {
-			/* should never happen */
-			WARN_ON(1);
-			tracing_disabled = 1;
-			ret = -1;
-			break;
-		}
-		page = list_entry(p, struct page, lru);
-		ClearPageLRU(page);
-		list_del(&page->lru);
-		tracing_pages_allocated--;
-		tracing_pages_allocated--;
-		__free_page(page);
-
-		tracing_reset(data);
-
-#ifdef CONFIG_TRACER_MAX_TRACE
-		data = max_tr.data[i];
-		p = data->trace_pages.next;
-		if (p == &data->trace_pages) {
-			/* should never happen */
-			WARN_ON(1);
-			tracing_disabled = 1;
-			ret = -1;
-			break;
-		}
-		page = list_entry(p, struct page, lru);
-		ClearPageLRU(page);
-		list_del(&page->lru);
-		__free_page(page);
-
-		tracing_reset(data);
+	max_tr.entries = ring_buffer_size(max_tr.buffer);
+	WARN_ON(max_tr.entries != global_trace.entries);
 #endif
-	}
-	global_trace.entries -= ENTRIES_PER_PAGE;
-
-	return ret;
-}
-
-__init static int tracer_alloc_buffers(void)
-{
-	struct trace_array_cpu *data;
-	void *array;
-	struct page *page;
-	int pages = 0;
-	int ret = -ENOMEM;
-	int i;
-
-	/* TODO: make the number of buffers hot pluggable with CPUS */
-	tracing_nr_buffers = num_possible_cpus();
-	tracing_buffer_mask = cpu_possible_map;
 
 	/* Allocate the first page for all buffers */
 	for_each_tracing_cpu(i) {
 		data = global_trace.data[i] = &per_cpu(global_trace_cpu, i);
 		max_tr.data[i] = &per_cpu(max_data, i);
-
-		array = (void *)__get_free_page(GFP_KERNEL);
-		if (array == NULL) {
-			printk(KERN_ERR "tracer: failed to allocate page"
-			       "for trace buffer!\n");
-			goto free_buffers;
-		}
-
-		/* set the array to the list */
-		INIT_LIST_HEAD(&data->trace_pages);
-		page = virt_to_page(array);
-		list_add(&page->lru, &data->trace_pages);
-		/* use the LRU flag to differentiate the two buffers */
-		ClearPageLRU(page);
-
-		data->lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
-		max_tr.data[i]->lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
-
-/* Only allocate if we are actually using the max trace */
-#ifdef CONFIG_TRACER_MAX_TRACE
-		array = (void *)__get_free_page(GFP_KERNEL);
-		if (array == NULL) {
-			printk(KERN_ERR "tracer: failed to allocate page"
-			       "for trace buffer!\n");
-			goto free_buffers;
-		}
-
-		INIT_LIST_HEAD(&max_tr.data[i]->trace_pages);
-		page = virt_to_page(array);
-		list_add(&page->lru, &max_tr.data[i]->trace_pages);
-		SetPageLRU(page);
-#endif
-	}
-
-	/*
-	 * Since we allocate by orders of pages, we may be able to
-	 * round up a bit.
-	 */
-	global_trace.entries = ENTRIES_PER_PAGE;
-	pages++;
-
-	while (global_trace.entries < trace_nr_entries) {
-		if (trace_alloc_page())
-			break;
-		pages++;
 	}
-	max_tr.entries = global_trace.entries;
-
-	pr_info("tracer: %d pages allocated for %ld entries of %ld bytes\n",
-		pages, trace_nr_entries, (long)TRACE_ENTRY_SIZE);
-	pr_info("   actual entries %ld\n", global_trace.entries);
 
 	trace_init_cmdlines();
 
@@ -3519,38 +3080,13 @@ __init static int tracer_alloc_buffers(v
 	/* All seems OK, enable tracing */
 	global_trace.ctrl = tracer_enabled;
 	tracing_disabled = 0;
+
 	atomic_notifier_chain_register(&panic_notifier_list,
 				       &trace_panic_notifier);
 
 	register_die_notifier(&trace_die_notifier);
 
 	return 0;
-
- free_buffers:
-	for (i-- ; i >= 0; i--) {
-		struct page *page, *tmp;
-		struct trace_array_cpu *data = global_trace.data[i];
-
-		if (data) {
-			list_for_each_entry_safe(page, tmp,
-						 &data->trace_pages, lru) {
-				list_del_init(&page->lru);
-				__free_page(page);
-			}
-		}
-
-#ifdef CONFIG_TRACER_MAX_TRACE
-		data = max_tr.data[i];
-		if (data) {
-			list_for_each_entry_safe(page, tmp,
-						 &data->trace_pages, lru) {
-				list_del_init(&page->lru);
-				__free_page(page);
-			}
-		}
-#endif
-	}
-	return ret;
 }
 early_initcall(tracer_alloc_buffers);
 fs_initcall(tracer_init_debugfs);
Index: linux-tip.git/kernel/trace/trace.h
===================================================================
--- linux-tip.git.orig/kernel/trace/trace.h	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace.h	2008-09-29 22:27:59.000000000 -0400
@@ -5,6 +5,7 @@
 #include <asm/atomic.h>
 #include <linux/sched.h>
 #include <linux/clocksource.h>
+#include <linux/ring_buffer.h>
 #include <linux/mmiotrace.h>
 #include <linux/ftrace.h>
 
@@ -102,7 +103,6 @@ struct trace_field {
 	char			flags;
 	char			preempt_count;
 	int			pid;
-	cycle_t			t;
 	union {
 		struct ftrace_entry		fn;
 		struct ctx_switch_entry		ctx;
@@ -139,16 +139,9 @@ struct trace_entry {
  * the trace, etc.)
  */
 struct trace_array_cpu {
-	struct list_head	trace_pages;
 	atomic_t		disabled;
-	raw_spinlock_t		lock;
-	struct lock_class_key	lock_key;
 
 	/* these fields get copied into max-trace: */
-	unsigned		trace_head_idx;
-	unsigned		trace_tail_idx;
-	void			*trace_head; /* producer */
-	void			*trace_tail; /* consumer */
 	unsigned long		trace_idx;
 	unsigned long		overrun;
 	unsigned long		saved_latency;
@@ -172,6 +165,7 @@ struct trace_iterator;
  * They have on/off state as well:
  */
 struct trace_array {
+	struct ring_buffer	*buffer;
 	unsigned long		entries;
 	long			ctrl;
 	int			cpu;
@@ -219,27 +213,21 @@ struct trace_iterator {
 	struct trace_array	*tr;
 	struct tracer		*trace;
 	void			*private;
-	long			last_overrun[NR_CPUS];
-	long			overrun[NR_CPUS];
+	struct ring_buffer_iter	*buffer_iter[NR_CPUS];
 
 	/* The below is zeroed out in pipe_read */
 	struct trace_seq	seq;
 	struct trace_entry	*ent;
 	int			cpu;
-
-	struct trace_entry	*prev_ent;
-	int			prev_cpu;
+	u64			ts;
 
 	unsigned long		iter_flags;
 	loff_t			pos;
-	unsigned long		next_idx[NR_CPUS];
-	struct list_head	*next_page[NR_CPUS];
-	unsigned		next_page_idx[NR_CPUS];
 	long			idx;
 };
 
 void trace_wake_up(void);
-void tracing_reset(struct trace_array_cpu *data);
+void tracing_reset(struct trace_array *tr, int cpu);
 int tracing_open_generic(struct inode *inode, struct file *filp);
 struct dentry *tracing_init_dentry(void);
 void init_tracer_sysprof_debugfs(struct dentry *d_tracer);
Index: linux-tip.git/kernel/trace/trace_functions.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_functions.c	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_functions.c	2008-09-29 22:27:59.000000000 -0400
@@ -23,7 +23,7 @@ static void function_reset(struct trace_
 	tr->time_start = ftrace_now(tr->cpu);
 
 	for_each_online_cpu(cpu)
-		tracing_reset(tr->data[cpu]);
+		tracing_reset(tr, cpu);
 }
 
 static void start_function_trace(struct trace_array *tr)
Index: linux-tip.git/kernel/trace/trace_irqsoff.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_irqsoff.c	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_irqsoff.c	2008-09-29 22:27:59.000000000 -0400
@@ -173,7 +173,7 @@ out_unlock:
 out:
 	data->critical_sequence = max_sequence;
 	data->preempt_timestamp = ftrace_now(cpu);
-	tracing_reset(data);
+	tracing_reset(tr, cpu);
 	trace_function(tr, data, CALLER_ADDR0, parent_ip, flags);
 }
 
@@ -203,7 +203,7 @@ start_critical_timing(unsigned long ip, 
 	data->critical_sequence = max_sequence;
 	data->preempt_timestamp = ftrace_now(cpu);
 	data->critical_start = parent_ip ? : ip;
-	tracing_reset(data);
+	tracing_reset(tr, cpu);
 
 	local_save_flags(flags);
 
@@ -234,7 +234,7 @@ stop_critical_timing(unsigned long ip, u
 
 	data = tr->data[cpu];
 
-	if (unlikely(!data) || unlikely(!head_page(data)) ||
+	if (unlikely(!data) ||
 	    !data->critical_start || atomic_read(&data->disabled))
 		return;
 
Index: linux-tip.git/kernel/trace/trace_mmiotrace.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_mmiotrace.c	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_mmiotrace.c	2008-09-29 22:27:59.000000000 -0400
@@ -27,7 +27,7 @@ static void mmio_reset_data(struct trace
 	tr->time_start = ftrace_now(tr->cpu);
 
 	for_each_online_cpu(cpu)
-		tracing_reset(tr->data[cpu]);
+		tracing_reset(tr, cpu);
 }
 
 static void mmio_trace_init(struct trace_array *tr)
@@ -130,10 +130,14 @@ static unsigned long count_overruns(stru
 {
 	int cpu;
 	unsigned long cnt = 0;
+/* FIXME: */
+#if 0
 	for_each_online_cpu(cpu) {
 		cnt += iter->overrun[cpu];
 		iter->overrun[cpu] = 0;
 	}
+#endif
+	(void)cpu;
 	return cnt;
 }
 
@@ -176,7 +180,7 @@ static int mmio_print_rw(struct trace_it
 	struct trace_entry *entry = iter->ent;
 	struct mmiotrace_rw *rw	= &entry->field.mmiorw;
 	struct trace_seq *s	= &iter->seq;
-	unsigned long long t	= ns2usecs(entry->field.t);
+	unsigned long long t	= ns2usecs(iter->ts);
 	unsigned long usec_rem	= do_div(t, 1000000ULL);
 	unsigned secs		= (unsigned long)t;
 	int ret = 1;
@@ -218,7 +222,7 @@ static int mmio_print_map(struct trace_i
 	struct trace_entry *entry = iter->ent;
 	struct mmiotrace_map *m	= &entry->field.mmiomap;
 	struct trace_seq *s	= &iter->seq;
-	unsigned long long t	= ns2usecs(entry->field.t);
+	unsigned long long t	= ns2usecs(iter->ts);
 	unsigned long usec_rem	= do_div(t, 1000000ULL);
 	unsigned secs		= (unsigned long)t;
 	int ret = 1;
@@ -250,7 +254,7 @@ static int mmio_print_mark(struct trace_
 	struct trace_entry *entry = iter->ent;
 	const char *msg		= entry->field.print.buf;
 	struct trace_seq *s	= &iter->seq;
-	unsigned long long t	= ns2usecs(entry->field.t);
+	unsigned long long t	= ns2usecs(iter->ts);
 	unsigned long usec_rem	= do_div(t, 1000000ULL);
 	unsigned secs		= (unsigned long)t;
 	int ret;
@@ -303,19 +307,19 @@ static void __trace_mmiotrace_rw(struct 
 				struct trace_array_cpu *data,
 				struct mmiotrace_rw *rw)
 {
+	struct ring_buffer_event *event;
 	struct trace_entry *entry;
 	unsigned long irq_flags;
 
-	raw_local_irq_save(irq_flags);
-	__raw_spin_lock(&data->lock);
-
-	entry				= tracing_get_trace_entry(tr, data);
+	event	= ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+					   &irq_flags);
+	if (!event)
+		return;
+	entry	= ring_buffer_event_data(event);
 	tracing_generic_entry_update(entry, 0);
 	entry->type			= TRACE_MMIO_RW;
 	entry->field.mmiorw		= *rw;
-
-	__raw_spin_unlock(&data->lock);
-	raw_local_irq_restore(irq_flags);
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 
 	trace_wake_up();
 }
@@ -331,19 +335,19 @@ static void __trace_mmiotrace_map(struct
 				struct trace_array_cpu *data,
 				struct mmiotrace_map *map)
 {
+	struct ring_buffer_event *event;
 	struct trace_entry *entry;
 	unsigned long irq_flags;
 
-	raw_local_irq_save(irq_flags);
-	__raw_spin_lock(&data->lock);
-
-	entry				= tracing_get_trace_entry(tr, data);
+	event	= ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+					   &irq_flags);
+	if (!event)
+		return;
+	entry	= ring_buffer_event_data(event);
 	tracing_generic_entry_update(entry, 0);
 	entry->type			= TRACE_MMIO_MAP;
 	entry->field.mmiomap		= *map;
-
-	__raw_spin_unlock(&data->lock);
-	raw_local_irq_restore(irq_flags);
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 
 	trace_wake_up();
 }
Index: linux-tip.git/kernel/trace/trace_sched_switch.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_sched_switch.c	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_sched_switch.c	2008-09-29 22:27:59.000000000 -0400
@@ -81,7 +81,7 @@ static void sched_switch_reset(struct tr
 	tr->time_start = ftrace_now(tr->cpu);
 
 	for_each_online_cpu(cpu)
-		tracing_reset(tr->data[cpu]);
+		tracing_reset(tr, cpu);
 }
 
 static int tracing_sched_register(void)
Index: linux-tip.git/kernel/trace/trace_sched_wakeup.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_sched_wakeup.c	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_sched_wakeup.c	2008-09-29 22:27:59.000000000 -0400
@@ -191,7 +191,7 @@ static void __wakeup_reset(struct trace_
 
 	for_each_possible_cpu(cpu) {
 		data = tr->data[cpu];
-		tracing_reset(data);
+		tracing_reset(tr, cpu);
 	}
 
 	wakeup_cpu = -1;
Index: linux-tip.git/kernel/trace/trace_boot.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_boot.c	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_boot.c	2008-09-29 22:27:59.000000000 -0400
@@ -34,7 +34,7 @@ static void boot_trace_init(struct trace
 	trace_boot_enabled = 0;
 
 	for_each_cpu_mask(cpu, cpu_possible_map)
-		tracing_reset(tr->data[cpu]);
+		tracing_reset(tr, cpu);
 }
 
 static void boot_trace_ctrl_update(struct trace_array *tr)
@@ -74,6 +74,7 @@ struct tracer boot_tracer __read_mostly 
 
 void trace_boot(struct boot_trace *it)
 {
+	struct ring_buffer_event *event;
 	struct trace_entry *entry;
 	struct trace_array_cpu *data;
 	unsigned long irq_flags;
@@ -85,17 +86,18 @@ void trace_boot(struct boot_trace *it)
 	preempt_disable();
 	data = tr->data[smp_processor_id()];
 
-	raw_local_irq_save(irq_flags);
-	__raw_spin_lock(&data->lock);
-
-	entry = tracing_get_trace_entry(tr, data);
+	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
+					 &irq_flags);
+	if (!event)
+		goto out;
+	entry	= ring_buffer_event_data(event);
 	tracing_generic_entry_update(entry, 0);
 	entry->type = TRACE_BOOT;
 	entry->field.initcall = *it;
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 
-	__raw_spin_unlock(&data->lock);
-	raw_local_irq_restore(irq_flags);
 	trace_wake_up();
 
+ out:
 	preempt_enable();
 }
Index: linux-tip.git/kernel/trace/trace_nop.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_nop.c	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_nop.c	2008-09-29 22:27:59.000000000 -0400
@@ -30,7 +30,7 @@ static void nop_trace_init(struct trace_
 	ctx_trace = tr;
 
 	for_each_online_cpu(cpu)
-		tracing_reset(tr->data[cpu]);
+		tracing_reset(tr, cpu);
 
 	if (tr->ctrl)
 		start_nop_trace(tr);
Index: linux-tip.git/kernel/trace/trace_selftest.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_selftest.c	2008-09-29 22:25:51.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_selftest.c	2008-09-29 22:27:59.000000000 -0400
@@ -18,58 +18,20 @@ static inline int trace_valid_entry(stru
 	return 0;
 }
 
-static int
-trace_test_buffer_cpu(struct trace_array *tr, struct trace_array_cpu *data)
+static int trace_test_buffer_cpu(struct trace_array *tr, int cpu)
 {
-	struct trace_entry *entries;
-	struct page *page;
-	int idx = 0;
-	int i;
-
-	BUG_ON(list_empty(&data->trace_pages));
-	page = list_entry(data->trace_pages.next, struct page, lru);
-	entries = page_address(page);
-
-	check_pages(data);
-	if (head_page(data) != entries)
-		goto failed;
+	struct ring_buffer_event *event;
+	struct trace_entry *entry;
 
-	/*
-	 * The starting trace buffer always has valid elements,
-	 * if any element exists.
-	 */
-	entries = head_page(data);
-
-	for (i = 0; i < tr->entries; i++) {
+	while ((event = ring_buffer_consume(tr->buffer, cpu, NULL))) {
+		entry = ring_buffer_event_data(event);
 
-		if (i < data->trace_idx && !trace_valid_entry(&entries[idx])) {
+		if (!trace_valid_entry(entry)) {
 			printk(KERN_CONT ".. invalid entry %d ",
-				entries[idx].type);
+				entry->type);
 			goto failed;
 		}
-
-		idx++;
-		if (idx >= ENTRIES_PER_PAGE) {
-			page = virt_to_page(entries);
-			if (page->lru.next == &data->trace_pages) {
-				if (i != tr->entries - 1) {
-					printk(KERN_CONT ".. entries buffer mismatch");
-					goto failed;
-				}
-			} else {
-				page = list_entry(page->lru.next, struct page, lru);
-				entries = page_address(page);
-			}
-			idx = 0;
-		}
 	}
-
-	page = virt_to_page(entries);
-	if (page->lru.next != &data->trace_pages) {
-		printk(KERN_CONT ".. too many entries");
-		goto failed;
-	}
-
 	return 0;
 
  failed:
@@ -91,13 +53,11 @@ static int trace_test_buffer(struct trac
 	/* Don't allow flipping of max traces now */
 	raw_local_irq_save(flags);
 	__raw_spin_lock(&ftrace_max_lock);
-	for_each_possible_cpu(cpu) {
-		if (!head_page(tr->data[cpu]))
-			continue;
 
-		cnt += tr->data[cpu]->trace_idx;
+	cnt = ring_buffer_entries(tr->buffer);
 
-		ret = trace_test_buffer_cpu(tr, tr->data[cpu]);
+	for_each_possible_cpu(cpu) {
+		ret = trace_test_buffer_cpu(tr, cpu);
 		if (ret)
 			break;
 	}
Index: linux-tip.git/kernel/trace/trace_sysprof.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_sysprof.c	2008-09-29 22:25:47.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_sysprof.c	2008-09-29 22:27:59.000000000 -0400
@@ -241,7 +241,7 @@ static void stack_reset(struct trace_arr
 	tr->time_start = ftrace_now(tr->cpu);
 
 	for_each_online_cpu(cpu)
-		tracing_reset(tr->data[cpu]);
+		tracing_reset(tr, cpu);
 }
 
 static void start_stack_trace(struct trace_array *tr)

-- 

[PATCH 6/6] ftrace: take advantage of variable length entries

[Steven Rostedt]

[-- Attachment #1: ftrace-variable-length-entries.patch --]
[-- Type: text/plain, Size: 33557 bytes --]

Now that the underlining ring buffer for ftrace now hold variable length
entries, we can take advantage of this by only storing the size of the
actual event into the buffer. This happens to increase the number of
entries in the buffer dramatically.

We can also get rid of the "trace_cont" operation, but I'm keeping that
until we have no more users. Some of the ftrace tracers can now change
their code to adapt to this new feature.

CC: Pekka Paalanen <pq@iki.fi>
CC: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 kernel/trace/trace.c           |  441 +++++++++++++++++++++--------------------
 kernel/trace/trace.h           |   81 +++----
 kernel/trace/trace_boot.c      |   13 -
 kernel/trace/trace_mmiotrace.c |   31 +-
 4 files changed, 302 insertions(+), 264 deletions(-)

Index: linux-tip.git/kernel/trace/trace.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace.c	2008-09-29 22:28:11.000000000 -0400
+++ linux-tip.git/kernel/trace/trace.c	2008-09-29 22:55:53.000000000 -0400
@@ -637,9 +637,9 @@ tracing_generic_entry_update(struct trac
 
 	pc = preempt_count();
 
-	entry->field.preempt_count	= pc & 0xff;
-	entry->field.pid		= (tsk) ? tsk->pid : 0;
-	entry->field.flags =
+	entry->preempt_count		= pc & 0xff;
+	entry->pid			= (tsk) ? tsk->pid : 0;
+	entry->flags =
 		(irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
 		((pc & HARDIRQ_MASK) ? TRACE_FLAG_HARDIRQ : 0) |
 		((pc & SOFTIRQ_MASK) ? TRACE_FLAG_SOFTIRQ : 0) |
@@ -651,7 +651,7 @@ trace_function(struct trace_array *tr, s
 	       unsigned long ip, unsigned long parent_ip, unsigned long flags)
 {
 	struct ring_buffer_event *event;
-	struct trace_entry *entry;
+	struct ftrace_entry *entry;
 	unsigned long irq_flags;
 
 	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
@@ -659,10 +659,10 @@ trace_function(struct trace_array *tr, s
 	if (!event)
 		return;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(entry, flags);
-	entry->type			= TRACE_FN;
-	entry->field.fn.ip		= ip;
-	entry->field.fn.parent_ip	= parent_ip;
+	tracing_generic_entry_update(&entry->ent, flags);
+	entry->ent.type			= TRACE_FN;
+	entry->ip			= ip;
+	entry->parent_ip		= parent_ip;
 	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 }
 
@@ -680,7 +680,7 @@ void __trace_stack(struct trace_array *t
 		   int skip)
 {
 	struct ring_buffer_event *event;
-	struct trace_entry *entry;
+	struct stack_entry *entry;
 	struct stack_trace trace;
 	unsigned long irq_flags;
 
@@ -692,15 +692,15 @@ void __trace_stack(struct trace_array *t
 	if (!event)
 		return;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(entry, flags);
-	entry->type		= TRACE_STACK;
+	tracing_generic_entry_update(&entry->ent, flags);
+	entry->ent.type		= TRACE_STACK;
 
-	memset(&entry->field.stack, 0, sizeof(entry->field.stack));
+	memset(&entry->caller, 0, sizeof(entry->caller));
 
 	trace.nr_entries	= 0;
 	trace.max_entries	= FTRACE_STACK_ENTRIES;
 	trace.skip		= skip;
-	trace.entries		= entry->field.stack.caller;
+	trace.entries		= entry->caller;
 
 	save_stack_trace(&trace);
 	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
@@ -713,7 +713,7 @@ __trace_special(void *__tr, void *__data
 	struct ring_buffer_event *event;
 	struct trace_array_cpu *data = __data;
 	struct trace_array *tr = __tr;
-	struct trace_entry *entry;
+	struct special_entry *entry;
 	unsigned long irq_flags;
 
 	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
@@ -721,11 +721,11 @@ __trace_special(void *__tr, void *__data
 	if (!event)
 		return;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(entry, 0);
-	entry->type			= TRACE_SPECIAL;
-	entry->field.special.arg1	= arg1;
-	entry->field.special.arg2	= arg2;
-	entry->field.special.arg3	= arg3;
+	tracing_generic_entry_update(&entry->ent, 0);
+	entry->ent.type			= TRACE_SPECIAL;
+	entry->arg1			= arg1;
+	entry->arg2			= arg2;
+	entry->arg3			= arg3;
 	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 	__trace_stack(tr, data, irq_flags, 4);
 
@@ -740,7 +740,7 @@ tracing_sched_switch_trace(struct trace_
 			   unsigned long flags)
 {
 	struct ring_buffer_event *event;
-	struct trace_entry *entry;
+	struct ctx_switch_entry *entry;
 	unsigned long irq_flags;
 
 	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
@@ -748,15 +748,15 @@ tracing_sched_switch_trace(struct trace_
 	if (!event)
 		return;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(entry, flags);
-	entry->type			= TRACE_CTX;
-	entry->field.ctx.prev_pid	= prev->pid;
-	entry->field.ctx.prev_prio	= prev->prio;
-	entry->field.ctx.prev_state	= prev->state;
-	entry->field.ctx.next_pid	= next->pid;
-	entry->field.ctx.next_prio	= next->prio;
-	entry->field.ctx.next_state	= next->state;
-	entry->field.ctx.next_cpu	= task_cpu(next);
+	tracing_generic_entry_update(&entry->ent, flags);
+	entry->ent.type			= TRACE_CTX;
+	entry->prev_pid			= prev->pid;
+	entry->prev_prio		= prev->prio;
+	entry->prev_state		= prev->state;
+	entry->next_pid			= next->pid;
+	entry->next_prio		= next->prio;
+	entry->next_state		= next->state;
+	entry->next_cpu	= task_cpu(next);
 	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 	__trace_stack(tr, data, flags, 5);
 }
@@ -769,7 +769,7 @@ tracing_sched_wakeup_trace(struct trace_
 			   unsigned long flags)
 {
 	struct ring_buffer_event *event;
-	struct trace_entry *entry;
+	struct ctx_switch_entry *entry;
 	unsigned long irq_flags;
 
 	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
@@ -777,15 +777,15 @@ tracing_sched_wakeup_trace(struct trace_
 	if (!event)
 		return;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(entry, flags);
-	entry->type		= TRACE_WAKE;
-	entry->field.ctx.prev_pid	= curr->pid;
-	entry->field.ctx.prev_prio	= curr->prio;
-	entry->field.ctx.prev_state	= curr->state;
-	entry->field.ctx.next_pid	= wakee->pid;
-	entry->field.ctx.next_prio	= wakee->prio;
-	entry->field.ctx.next_state	= wakee->state;
-	entry->field.ctx.next_cpu	= task_cpu(wakee);
+	tracing_generic_entry_update(&entry->ent, flags);
+	entry->ent.type			= TRACE_WAKE;
+	entry->prev_pid			= curr->pid;
+	entry->prev_prio		= curr->prio;
+	entry->prev_state		= curr->state;
+	entry->next_pid			= wakee->pid;
+	entry->next_prio		= wakee->prio;
+	entry->next_state		= wakee->state;
+	entry->next_cpu			= task_cpu(wakee);
 	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 	__trace_stack(tr, data, flags, 6);
 
@@ -1173,20 +1173,19 @@ print_trace_header(struct seq_file *m, s
 static void
 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
 {
-	struct trace_field *field = &entry->field;
 	int hardirq, softirq;
 	char *comm;
 
-	comm = trace_find_cmdline(field->pid);
+	comm = trace_find_cmdline(entry->pid);
 
-	trace_seq_printf(s, "%8.8s-%-5d ", comm, field->pid);
+	trace_seq_printf(s, "%8.8s-%-5d ", comm, entry->pid);
 	trace_seq_printf(s, "%3d", cpu);
 	trace_seq_printf(s, "%c%c",
-			(field->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : '.',
-			((field->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'));
+			(entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : '.',
+			((entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.'));
 
-	hardirq = field->flags & TRACE_FLAG_HARDIRQ;
-	softirq = field->flags & TRACE_FLAG_SOFTIRQ;
+	hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
+	softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
 	if (hardirq && softirq) {
 		trace_seq_putc(s, 'H');
 	} else {
@@ -1200,8 +1199,8 @@ lat_print_generic(struct trace_seq *s, s
 		}
 	}
 
-	if (field->preempt_count)
-		trace_seq_printf(s, "%x", field->preempt_count);
+	if (entry->preempt_count)
+		trace_seq_printf(s, "%x", entry->preempt_count);
 	else
 		trace_seq_puts(s, ".");
 }
@@ -1230,6 +1229,7 @@ static const char state_to_char[] = TASK
 void trace_seq_print_cont(struct trace_seq *s, struct trace_iterator *iter)
 {
 	struct trace_entry *ent;
+	struct trace_field_cont *cont;
 	bool ok = true;
 
 	ent = peek_next_entry(iter, iter->cpu, NULL);
@@ -1239,8 +1239,9 @@ void trace_seq_print_cont(struct trace_s
 	}
 
 	do {
+		cont = (struct trace_field_cont *)ent;
 		if (ok)
-			ok = (trace_seq_printf(s, "%s", ent->cont.buf) > 0);
+			ok = (trace_seq_printf(s, "%s", cont->buf) > 0);
 		ring_buffer_read(iter->buffer_iter[iter->cpu], NULL);
 		ent = peek_next_entry(iter, iter->cpu, NULL);
 	} while (ent && ent->type == TRACE_CONT);
@@ -1257,7 +1258,6 @@ print_lat_fmt(struct trace_iterator *ite
 	struct trace_entry *next_entry;
 	unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
 	struct trace_entry *entry = iter->ent;
-	struct trace_field *field = &entry->field;
 	unsigned long abs_usecs;
 	unsigned long rel_usecs;
 	u64 next_ts;
@@ -1276,12 +1276,12 @@ print_lat_fmt(struct trace_iterator *ite
 	abs_usecs = ns2usecs(iter->ts - iter->tr->time_start);
 
 	if (verbose) {
-		comm = trace_find_cmdline(field->pid);
+		comm = trace_find_cmdline(entry->pid);
 		trace_seq_printf(s, "%16s %5d %3d %d %08x %08x [%08lx]"
 				 " %ld.%03ldms (+%ld.%03ldms): ",
 				 comm,
-				 field->pid, cpu, field->flags,
-				 field->preempt_count, trace_idx,
+				 entry->pid, cpu, entry->flags,
+				 entry->preempt_count, trace_idx,
 				 ns2usecs(iter->ts),
 				 abs_usecs/1000,
 				 abs_usecs % 1000, rel_usecs/1000,
@@ -1291,53 +1291,69 @@ print_lat_fmt(struct trace_iterator *ite
 		lat_print_timestamp(s, abs_usecs, rel_usecs);
 	}
 	switch (entry->type) {
-	case TRACE_FN:
-		seq_print_ip_sym(s, field->fn.ip, sym_flags);
+	case TRACE_FN: {
+		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+
+		seq_print_ip_sym(s, field->ip, sym_flags);
 		trace_seq_puts(s, " (");
-		if (kretprobed(field->fn.parent_ip))
+		if (kretprobed(field->parent_ip))
 			trace_seq_puts(s, KRETPROBE_MSG);
 		else
-			seq_print_ip_sym(s, field->fn.parent_ip, sym_flags);
+			seq_print_ip_sym(s, field->parent_ip, sym_flags);
 		trace_seq_puts(s, ")\n");
 		break;
+	}
 	case TRACE_CTX:
-	case TRACE_WAKE:
-		T = field->ctx.next_state < sizeof(state_to_char) ?
-			state_to_char[field->ctx.next_state] : 'X';
+	case TRACE_WAKE: {
+		struct ctx_switch_entry *field =
+			(struct ctx_switch_entry *)entry;
 
-		state = field->ctx.prev_state ?
-			__ffs(field->ctx.prev_state) + 1 : 0;
+		T = field->next_state < sizeof(state_to_char) ?
+			state_to_char[field->next_state] : 'X';
+
+		state = field->prev_state ?
+			__ffs(field->prev_state) + 1 : 0;
 		S = state < sizeof(state_to_char) - 1 ? state_to_char[state] : 'X';
-		comm = trace_find_cmdline(field->ctx.next_pid);
+		comm = trace_find_cmdline(field->next_pid);
 		trace_seq_printf(s, " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
-				 field->ctx.prev_pid,
-				 field->ctx.prev_prio,
+				 field->prev_pid,
+				 field->prev_prio,
 				 S, entry->type == TRACE_CTX ? "==>" : "  +",
-				 field->ctx.next_cpu,
-				 field->ctx.next_pid,
-				 field->ctx.next_prio,
+				 field->next_cpu,
+				 field->next_pid,
+				 field->next_prio,
 				 T, comm);
 		break;
-	case TRACE_SPECIAL:
+	}
+	case TRACE_SPECIAL: {
+		struct special_entry *field = (struct special_entry *)entry;
+
 		trace_seq_printf(s, "# %ld %ld %ld\n",
-				 field->special.arg1,
-				 field->special.arg2,
-				 field->special.arg3);
+				 field->arg1,
+				 field->arg2,
+				 field->arg3);
 		break;
-	case TRACE_STACK:
+	}
+	case TRACE_STACK: {
+		struct stack_entry *field = (struct stack_entry *)entry;
+
 		for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
 			if (i)
 				trace_seq_puts(s, " <= ");
-			seq_print_ip_sym(s, field->stack.caller[i], sym_flags);
+			seq_print_ip_sym(s, field->caller[i], sym_flags);
 		}
 		trace_seq_puts(s, "\n");
 		break;
-	case TRACE_PRINT:
-		seq_print_ip_sym(s, field->print.ip, sym_flags);
-		trace_seq_printf(s, ": %s", field->print.buf);
-		if (field->flags & TRACE_FLAG_CONT)
+	}
+	case TRACE_PRINT: {
+		struct print_entry *field = (struct print_entry *)entry;
+
+		seq_print_ip_sym(s, field->ip, sym_flags);
+		trace_seq_printf(s, ": %s", field->buf);
+		if (entry->flags & TRACE_FLAG_CONT)
 			trace_seq_print_cont(s, iter);
 		break;
+	}
 	default:
 		trace_seq_printf(s, "Unknown type %d\n", entry->type);
 	}
@@ -1349,7 +1365,6 @@ static int print_trace_fmt(struct trace_
 	struct trace_seq *s = &iter->seq;
 	unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
 	struct trace_entry *entry;
-	struct trace_field *field;
 	unsigned long usec_rem;
 	unsigned long long t;
 	unsigned long secs;
@@ -1363,15 +1378,13 @@ static int print_trace_fmt(struct trace_
 	if (entry->type == TRACE_CONT)
 		return 1;
 
-	field = &entry->field;
-
-	comm = trace_find_cmdline(iter->ent->field.pid);
+	comm = trace_find_cmdline(iter->ent->pid);
 
 	t = ns2usecs(iter->ts);
 	usec_rem = do_div(t, 1000000ULL);
 	secs = (unsigned long)t;
 
-	ret = trace_seq_printf(s, "%16s-%-5d ", comm, field->pid);
+	ret = trace_seq_printf(s, "%16s-%-5d ", comm, entry->pid);
 	if (!ret)
 		return 0;
 	ret = trace_seq_printf(s, "[%03d] ", iter->cpu);
@@ -1382,20 +1395,22 @@ static int print_trace_fmt(struct trace_
 		return 0;
 
 	switch (entry->type) {
-	case TRACE_FN:
-		ret = seq_print_ip_sym(s, field->fn.ip, sym_flags);
+	case TRACE_FN: {
+		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+
+		ret = seq_print_ip_sym(s, field->ip, sym_flags);
 		if (!ret)
 			return 0;
 		if ((sym_flags & TRACE_ITER_PRINT_PARENT) &&
-						field->fn.parent_ip) {
+						field->parent_ip) {
 			ret = trace_seq_printf(s, " <-");
 			if (!ret)
 				return 0;
-			if (kretprobed(field->fn.parent_ip))
+			if (kretprobed(field->parent_ip))
 				ret = trace_seq_puts(s, KRETPROBE_MSG);
 			else
 				ret = seq_print_ip_sym(s,
-						       field->fn.parent_ip,
+						       field->parent_ip,
 						       sym_flags);
 			if (!ret)
 				return 0;
@@ -1404,40 +1419,50 @@ static int print_trace_fmt(struct trace_
 		if (!ret)
 			return 0;
 		break;
+	}
 	case TRACE_CTX:
-	case TRACE_WAKE:
-		S = field->ctx.prev_state < sizeof(state_to_char) ?
-			state_to_char[field->ctx.prev_state] : 'X';
-		T = field->ctx.next_state < sizeof(state_to_char) ?
-			state_to_char[field->ctx.next_state] : 'X';
+	case TRACE_WAKE: {
+		struct ctx_switch_entry *field =
+			(struct ctx_switch_entry *)entry;
+
+		S = field->prev_state < sizeof(state_to_char) ?
+			state_to_char[field->prev_state] : 'X';
+		T = field->next_state < sizeof(state_to_char) ?
+			state_to_char[field->next_state] : 'X';
 		ret = trace_seq_printf(s, " %5d:%3d:%c %s [%03d] %5d:%3d:%c\n",
-				       field->ctx.prev_pid,
-				       field->ctx.prev_prio,
+				       field->prev_pid,
+				       field->prev_prio,
 				       S,
 				       entry->type == TRACE_CTX ? "==>" : "  +",
-				       field->ctx.next_cpu,
-				       field->ctx.next_pid,
-				       field->ctx.next_prio,
+				       field->next_cpu,
+				       field->next_pid,
+				       field->next_prio,
 				       T);
 		if (!ret)
 			return 0;
 		break;
-	case TRACE_SPECIAL:
+	}
+	case TRACE_SPECIAL: {
+		struct special_entry *field = (struct special_entry *)entry;
+
 		ret = trace_seq_printf(s, "# %ld %ld %ld\n",
-				 field->special.arg1,
-				 field->special.arg2,
-				 field->special.arg3);
+				 field->arg1,
+				 field->arg2,
+				 field->arg3);
 		if (!ret)
 			return 0;
 		break;
-	case TRACE_STACK:
+	}
+	case TRACE_STACK: {
+		struct stack_entry *field = (struct stack_entry *)entry;
+
 		for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
 			if (i) {
 				ret = trace_seq_puts(s, " <= ");
 				if (!ret)
 					return 0;
 			}
-			ret = seq_print_ip_sym(s, field->stack.caller[i],
+			ret = seq_print_ip_sym(s, field->caller[i],
 					       sym_flags);
 			if (!ret)
 				return 0;
@@ -1446,13 +1471,17 @@ static int print_trace_fmt(struct trace_
 		if (!ret)
 			return 0;
 		break;
-	case TRACE_PRINT:
-		seq_print_ip_sym(s, field->print.ip, sym_flags);
-		trace_seq_printf(s, ": %s", field->print.buf);
-		if (field->flags & TRACE_FLAG_CONT)
+	}
+	case TRACE_PRINT: {
+		struct print_entry *field = (struct print_entry *)entry;
+
+		seq_print_ip_sym(s, field->ip, sym_flags);
+		trace_seq_printf(s, ": %s", field->buf);
+		if (entry->flags & TRACE_FLAG_CONT)
 			trace_seq_print_cont(s, iter);
 		break;
 	}
+	}
 	return 1;
 }
 
@@ -1460,7 +1489,6 @@ static int print_raw_fmt(struct trace_it
 {
 	struct trace_seq *s = &iter->seq;
 	struct trace_entry *entry;
-	struct trace_field *field;
 	int ret;
 	int S, T;
 
@@ -1469,56 +1497,66 @@ static int print_raw_fmt(struct trace_it
 	if (entry->type == TRACE_CONT)
 		return 1;
 
-	field = &entry->field;
-
 	ret = trace_seq_printf(s, "%d %d %llu ",
-		field->pid, iter->cpu, iter->ts);
+		entry->pid, iter->cpu, iter->ts);
 	if (!ret)
 		return 0;
 
 	switch (entry->type) {
-	case TRACE_FN:
+	case TRACE_FN: {
+		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+
 		ret = trace_seq_printf(s, "%x %x\n",
-					field->fn.ip,
-					field->fn.parent_ip);
+					field->ip,
+					field->parent_ip);
 		if (!ret)
 			return 0;
 		break;
+	}
 	case TRACE_CTX:
-	case TRACE_WAKE:
-		S = field->ctx.prev_state < sizeof(state_to_char) ?
-			state_to_char[field->ctx.prev_state] : 'X';
-		T = field->ctx.next_state < sizeof(state_to_char) ?
-			state_to_char[field->ctx.next_state] : 'X';
+	case TRACE_WAKE: {
+		struct ctx_switch_entry *field =
+			(struct ctx_switch_entry *)entry;
+
+		S = field->prev_state < sizeof(state_to_char) ?
+			state_to_char[field->prev_state] : 'X';
+		T = field->next_state < sizeof(state_to_char) ?
+			state_to_char[field->next_state] : 'X';
 		if (entry->type == TRACE_WAKE)
 			S = '+';
 		ret = trace_seq_printf(s, "%d %d %c %d %d %d %c\n",
-				       field->ctx.prev_pid,
-				       field->ctx.prev_prio,
+				       field->prev_pid,
+				       field->prev_prio,
 				       S,
-				       field->ctx.next_cpu,
-				       field->ctx.next_pid,
-				       field->ctx.next_prio,
+				       field->next_cpu,
+				       field->next_pid,
+				       field->next_prio,
 				       T);
 		if (!ret)
 			return 0;
 		break;
+	}
 	case TRACE_SPECIAL:
-	case TRACE_STACK:
+	case TRACE_STACK: {
+		struct special_entry *field = (struct special_entry *)entry;
+
 		ret = trace_seq_printf(s, "# %ld %ld %ld\n",
-				 field->special.arg1,
-				 field->special.arg2,
-				 field->special.arg3);
+				 field->arg1,
+				 field->arg2,
+				 field->arg3);
 		if (!ret)
 			return 0;
 		break;
-	case TRACE_PRINT:
-		trace_seq_printf(s, "# %lx %s",
-				 field->print.ip, field->print.buf);
-		if (field->flags & TRACE_FLAG_CONT)
+	}
+	case TRACE_PRINT: {
+		struct print_entry *field = (struct print_entry *)entry;
+
+		trace_seq_printf(s, "# %lx %s", field->ip, field->buf);
+		if (entry->flags & TRACE_FLAG_CONT)
 			trace_seq_print_cont(s, iter);
 		break;
 	}
+	}
 	return 1;
 }
 
@@ -1539,7 +1577,6 @@ static int print_hex_fmt(struct trace_it
 	struct trace_seq *s = &iter->seq;
 	unsigned char newline = '\n';
 	struct trace_entry *entry;
-	struct trace_field *field;
 	int S, T;
 
 	entry = iter->ent;
@@ -1547,40 +1584,48 @@ static int print_hex_fmt(struct trace_it
 	if (entry->type == TRACE_CONT)
 		return 1;
 
-	field = &entry->field;
-
-	SEQ_PUT_HEX_FIELD_RET(s, field->pid);
+	SEQ_PUT_HEX_FIELD_RET(s, entry->pid);
 	SEQ_PUT_HEX_FIELD_RET(s, iter->cpu);
 	SEQ_PUT_HEX_FIELD_RET(s, iter->ts);
 
 	switch (entry->type) {
-	case TRACE_FN:
-		SEQ_PUT_HEX_FIELD_RET(s, field->fn.ip);
-		SEQ_PUT_HEX_FIELD_RET(s, field->fn.parent_ip);
+	case TRACE_FN: {
+		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+
+		SEQ_PUT_HEX_FIELD_RET(s, field->ip);
+		SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
 		break;
+	}
 	case TRACE_CTX:
-	case TRACE_WAKE:
-		S = field->ctx.prev_state < sizeof(state_to_char) ?
-			state_to_char[field->ctx.prev_state] : 'X';
-		T = field->ctx.next_state < sizeof(state_to_char) ?
-			state_to_char[field->ctx.next_state] : 'X';
+	case TRACE_WAKE: {
+		struct ctx_switch_entry *field =
+			(struct ctx_switch_entry *)entry;
+
+		S = field->prev_state < sizeof(state_to_char) ?
+			state_to_char[field->prev_state] : 'X';
+		T = field->next_state < sizeof(state_to_char) ?
+			state_to_char[field->next_state] : 'X';
 		if (entry->type == TRACE_WAKE)
 			S = '+';
-		SEQ_PUT_HEX_FIELD_RET(s, field->ctx.prev_pid);
-		SEQ_PUT_HEX_FIELD_RET(s, field->ctx.prev_prio);
+		SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
+		SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
 		SEQ_PUT_HEX_FIELD_RET(s, S);
-		SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_cpu);
-		SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_pid);
-		SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_prio);
+		SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
+		SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
+		SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
 		SEQ_PUT_HEX_FIELD_RET(s, T);
 		break;
+	}
 	case TRACE_SPECIAL:
-	case TRACE_STACK:
-		SEQ_PUT_HEX_FIELD_RET(s, field->special.arg1);
-		SEQ_PUT_HEX_FIELD_RET(s, field->special.arg2);
-		SEQ_PUT_HEX_FIELD_RET(s, field->special.arg3);
+	case TRACE_STACK: {
+		struct special_entry *field = (struct special_entry *)entry;
+
+		SEQ_PUT_HEX_FIELD_RET(s, field->arg1);
+		SEQ_PUT_HEX_FIELD_RET(s, field->arg2);
+		SEQ_PUT_HEX_FIELD_RET(s, field->arg3);
 		break;
 	}
+	}
 	SEQ_PUT_FIELD_RET(s, newline);
 
 	return 1;
@@ -1590,39 +1635,46 @@ static int print_bin_fmt(struct trace_it
 {
 	struct trace_seq *s = &iter->seq;
 	struct trace_entry *entry;
-	struct trace_field *field;
 
 	entry = iter->ent;
 
 	if (entry->type == TRACE_CONT)
 		return 1;
 
-	field = &entry->field;
-
-	SEQ_PUT_FIELD_RET(s, field->pid);
-	SEQ_PUT_FIELD_RET(s, field->cpu);
+	SEQ_PUT_FIELD_RET(s, entry->pid);
+	SEQ_PUT_FIELD_RET(s, iter->cpu);
 	SEQ_PUT_FIELD_RET(s, iter->ts);
 
 	switch (entry->type) {
-	case TRACE_FN:
-		SEQ_PUT_FIELD_RET(s, field->fn.ip);
-		SEQ_PUT_FIELD_RET(s, field->fn.parent_ip);
+	case TRACE_FN: {
+		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+
+		SEQ_PUT_FIELD_RET(s, field->ip);
+		SEQ_PUT_FIELD_RET(s, field->parent_ip);
 		break;
-	case TRACE_CTX:
-		SEQ_PUT_FIELD_RET(s, field->ctx.prev_pid);
-		SEQ_PUT_FIELD_RET(s, field->ctx.prev_prio);
-		SEQ_PUT_FIELD_RET(s, field->ctx.prev_state);
-		SEQ_PUT_FIELD_RET(s, field->ctx.next_pid);
-		SEQ_PUT_FIELD_RET(s, field->ctx.next_prio);
-		SEQ_PUT_FIELD_RET(s, field->ctx.next_state);
+	}
+	case TRACE_CTX: {
+		struct ctx_switch_entry *field =
+			(struct ctx_switch_entry *)entry;
+
+		SEQ_PUT_FIELD_RET(s, field->prev_pid);
+		SEQ_PUT_FIELD_RET(s, field->prev_prio);
+		SEQ_PUT_FIELD_RET(s, field->prev_state);
+		SEQ_PUT_FIELD_RET(s, field->next_pid);
+		SEQ_PUT_FIELD_RET(s, field->next_prio);
+		SEQ_PUT_FIELD_RET(s, field->next_state);
 		break;
+	}
 	case TRACE_SPECIAL:
-	case TRACE_STACK:
-		SEQ_PUT_FIELD_RET(s, field->special.arg1);
-		SEQ_PUT_FIELD_RET(s, field->special.arg2);
-		SEQ_PUT_FIELD_RET(s, field->special.arg3);
+	case TRACE_STACK: {
+		struct special_entry *field = (struct special_entry *)entry;
+
+		SEQ_PUT_FIELD_RET(s, field->arg1);
+		SEQ_PUT_FIELD_RET(s, field->arg2);
+		SEQ_PUT_FIELD_RET(s, field->arg3);
 		break;
 	}
+	}
 	return 1;
 }
 
@@ -2818,10 +2870,10 @@ int trace_vprintk(unsigned long ip, cons
 	struct ring_buffer_event *event;
 	struct trace_array *tr = &global_trace;
 	struct trace_array_cpu *data;
-	struct trace_entry *entry;
+	struct print_entry *entry;
 	unsigned long flags, irq_flags;
 	long disabled;
-	int cpu, len = 0, write, written = 0;
+	int cpu, len = 0, size;
 
 	if (!tr->ctrl || tracing_disabled)
 		return 0;
@@ -2840,39 +2892,18 @@ int trace_vprintk(unsigned long ip, cons
 	len = min(len, TRACE_BUF_SIZE-1);
 	trace_buf[len] = 0;
 
-	event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
-					 &irq_flags);
+	size = sizeof(*entry) + len + 1;
+	event = ring_buffer_lock_reserve(tr->buffer, size, &irq_flags);
 	if (!event)
 		goto out_unlock;
-	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(entry, flags);
-	entry->type			= TRACE_PRINT;
-	entry->field.print.ip		= ip;
-
-	write = min(len, (int)(TRACE_PRINT_BUF_SIZE-1));
-
-	memcpy(&entry->field.print.buf, trace_buf, write);
-	entry->field.print.buf[write] = 0;
-	written = write;
-	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
+	entry = ring_buffer_event_data(event);
+	tracing_generic_entry_update(&entry->ent, flags);
+	entry->ent.type			= TRACE_PRINT;
+	entry->ip			= ip;
 
-	if (written != len)
-		entry->field.flags |= TRACE_FLAG_CONT;
-
-	while (written != len) {
-		event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
-						 &irq_flags);
-		if (!event)
-			goto out_unlock;
-		entry	= ring_buffer_event_data(event);
-
-		entry->type = TRACE_CONT;
-		write = min(len - written, (int)(TRACE_CONT_BUF_SIZE-1));
-		memcpy(&entry->cont.buf, trace_buf+written, write);
-		entry->cont.buf[write] = 0;
-		written += write;
-		ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
-	}
+	memcpy(&entry->buf, trace_buf, len);
+	entry->buf[len] = 0;
+	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 
  out_unlock:
 	spin_unlock(&trace_buf_lock);
Index: linux-tip.git/kernel/trace/trace.h
===================================================================
--- linux-tip.git.orig/kernel/trace/trace.h	2008-09-29 22:27:59.000000000 -0400
+++ linux-tip.git/kernel/trace/trace.h	2008-09-29 22:32:54.000000000 -0400
@@ -27,9 +27,24 @@ enum trace_type {
 };
 
 /*
+ * The trace entry - the most basic unit of tracing. This is what
+ * is printed in the end as a single line in the trace output, such as:
+ *
+ *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
+ */
+struct trace_entry {
+	unsigned char		type;
+	unsigned char		cpu;
+	unsigned char		flags;
+	unsigned char		preempt_count;
+	int			pid;
+};
+
+/*
  * Function trace entry - function address and parent function addres:
  */
 struct ftrace_entry {
+	struct trace_entry	ent;
 	unsigned long		ip;
 	unsigned long		parent_ip;
 };
@@ -39,6 +54,7 @@ extern struct tracer boot_tracer;
  * Context switch trace entry - which task (and prio) we switched from/to:
  */
 struct ctx_switch_entry {
+	struct trace_entry	ent;
 	unsigned int		prev_pid;
 	unsigned char		prev_prio;
 	unsigned char		prev_state;
@@ -52,6 +68,7 @@ struct ctx_switch_entry {
  * Special (free-form) trace entry:
  */
 struct special_entry {
+	struct trace_entry	ent;
 	unsigned long		arg1;
 	unsigned long		arg2;
 	unsigned long		arg3;
@@ -64,6 +81,7 @@ struct special_entry {
 #define FTRACE_STACK_ENTRIES	8
 
 struct stack_entry {
+	struct trace_entry	ent;
 	unsigned long		caller[FTRACE_STACK_ENTRIES];
 };
 
@@ -71,10 +89,34 @@ struct stack_entry {
  * ftrace_printk entry:
  */
 struct print_entry {
+	struct trace_entry	ent;
 	unsigned long		ip;
 	char			buf[];
 };
 
+#define TRACE_OLD_SIZE		88
+
+struct trace_field_cont {
+	unsigned char		type;
+	/* Temporary till we get rid of this completely */
+	char			buf[TRACE_OLD_SIZE - 1];
+};
+
+struct trace_mmiotrace_rw {
+	struct trace_entry	ent;
+	struct mmiotrace_rw	rw;
+};
+
+struct trace_mmiotrace_map {
+	struct trace_entry	ent;
+	struct mmiotrace_map	map;
+};
+
+struct trace_boot {
+	struct trace_entry	ent;
+	struct boot_trace	initcall;
+};
+
 /*
  * trace_flag_type is an enumeration that holds different
  * states when a trace occurs. These are:
@@ -92,46 +134,7 @@ enum trace_flag_type {
 	TRACE_FLAG_CONT			= 0x10,
 };
 
-/*
- * The trace field - the most basic unit of tracing. This is what
- * is printed in the end as a single line in the trace output, such as:
- *
- *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
- */
-struct trace_field {
-	char			cpu;
-	char			flags;
-	char			preempt_count;
-	int			pid;
-	union {
-		struct ftrace_entry		fn;
-		struct ctx_switch_entry		ctx;
-		struct special_entry		special;
-		struct stack_entry		stack;
-		struct print_entry		print;
-		struct mmiotrace_rw		mmiorw;
-		struct mmiotrace_map		mmiomap;
-		struct boot_trace		initcall;
-	};
-};
-
-struct trace_field_cont {
-	char				buf[sizeof(struct trace_field)];
-};
-
-struct trace_entry {
-	char 				type;
-	union {
-		struct trace_field	field;
-		struct trace_field_cont	cont;
-	};
-};
-
-#define TRACE_ENTRY_SIZE	sizeof(struct trace_entry)
 #define TRACE_BUF_SIZE		1024
-#define TRACE_PRINT_BUF_SIZE \
-	(sizeof(struct trace_field) - offsetof(struct trace_field, print.buf))
-#define TRACE_CONT_BUF_SIZE	sizeof(struct trace_field)
 
 /*
  * The CPU trace array - it consists of thousands of trace entries
Index: linux-tip.git/kernel/trace/trace_mmiotrace.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_mmiotrace.c	2008-09-29 22:27:59.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_mmiotrace.c	2008-09-29 22:32:54.000000000 -0400
@@ -178,14 +178,16 @@ print_out:
 static int mmio_print_rw(struct trace_iterator *iter)
 {
 	struct trace_entry *entry = iter->ent;
-	struct mmiotrace_rw *rw	= &entry->field.mmiorw;
+	struct trace_mmiotrace_rw *field =
+		(struct trace_mmiotrace_rw *)entry;
+	struct mmiotrace_rw *rw	= &field->rw;
 	struct trace_seq *s	= &iter->seq;
 	unsigned long long t	= ns2usecs(iter->ts);
 	unsigned long usec_rem	= do_div(t, 1000000ULL);
 	unsigned secs		= (unsigned long)t;
 	int ret = 1;
 
-	switch (entry->field.mmiorw.opcode) {
+	switch (rw->opcode) {
 	case MMIO_READ:
 		ret = trace_seq_printf(s,
 			"R %d %lu.%06lu %d 0x%llx 0x%lx 0x%lx %d\n",
@@ -220,14 +222,14 @@ static int mmio_print_rw(struct trace_it
 static int mmio_print_map(struct trace_iterator *iter)
 {
 	struct trace_entry *entry = iter->ent;
-	struct mmiotrace_map *m	= &entry->field.mmiomap;
+	struct mmiotrace_map *m	= (struct mmiotrace_map *)entry;
 	struct trace_seq *s	= &iter->seq;
 	unsigned long long t	= ns2usecs(iter->ts);
 	unsigned long usec_rem	= do_div(t, 1000000ULL);
 	unsigned secs		= (unsigned long)t;
 	int ret = 1;
 
-	switch (entry->field.mmiorw.opcode) {
+	switch (m->opcode) {
 	case MMIO_PROBE:
 		ret = trace_seq_printf(s,
 			"MAP %lu.%06lu %d 0x%llx 0x%lx 0x%lx 0x%lx %d\n",
@@ -252,7 +254,8 @@ static int mmio_print_map(struct trace_i
 static int mmio_print_mark(struct trace_iterator *iter)
 {
 	struct trace_entry *entry = iter->ent;
-	const char *msg		= entry->field.print.buf;
+	struct print_entry *print = (struct print_entry *)entry;
+	const char *msg		= print->buf;
 	struct trace_seq *s	= &iter->seq;
 	unsigned long long t	= ns2usecs(iter->ts);
 	unsigned long usec_rem	= do_div(t, 1000000ULL);
@@ -264,7 +267,7 @@ static int mmio_print_mark(struct trace_
 	if (!ret)
 		return 0;
 
-	if (entry->field.flags & TRACE_FLAG_CONT)
+	if (entry->flags & TRACE_FLAG_CONT)
 		trace_seq_print_cont(s, iter);
 
 	return 1;
@@ -308,7 +311,7 @@ static void __trace_mmiotrace_rw(struct 
 				struct mmiotrace_rw *rw)
 {
 	struct ring_buffer_event *event;
-	struct trace_entry *entry;
+	struct trace_mmiotrace_rw *entry;
 	unsigned long irq_flags;
 
 	event	= ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
@@ -316,9 +319,9 @@ static void __trace_mmiotrace_rw(struct 
 	if (!event)
 		return;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(entry, 0);
-	entry->type			= TRACE_MMIO_RW;
-	entry->field.mmiorw		= *rw;
+	tracing_generic_entry_update(&entry->ent, 0);
+	entry->ent.type			= TRACE_MMIO_RW;
+	entry->rw			= *rw;
 	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 
 	trace_wake_up();
@@ -336,7 +339,7 @@ static void __trace_mmiotrace_map(struct
 				struct mmiotrace_map *map)
 {
 	struct ring_buffer_event *event;
-	struct trace_entry *entry;
+	struct trace_mmiotrace_map *entry;
 	unsigned long irq_flags;
 
 	event	= ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
@@ -344,9 +347,9 @@ static void __trace_mmiotrace_map(struct
 	if (!event)
 		return;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(entry, 0);
-	entry->type			= TRACE_MMIO_MAP;
-	entry->field.mmiomap		= *map;
+	tracing_generic_entry_update(&entry->ent, 0);
+	entry->ent.type			= TRACE_MMIO_MAP;
+	entry->map			= *map;
 	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 
 	trace_wake_up();
Index: linux-tip.git/kernel/trace/trace_boot.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_boot.c	2008-09-29 22:27:59.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_boot.c	2008-09-29 22:32:54.000000000 -0400
@@ -49,10 +49,11 @@ static int initcall_print_line(struct tr
 {
 	int ret = 0;
 	struct trace_entry *entry = iter->ent;
-	struct boot_trace *it = &entry->field.initcall;
+	struct trace_boot *field = (struct trace_boot *)entry;
+	struct boot_trace *it = &field->initcall;
 	struct trace_seq *s = &iter->seq;
 
-	if (iter->ent->type == TRACE_BOOT)
+	if (entry->type == TRACE_BOOT)
 		ret = trace_seq_printf(s, "%pF called from %i "
 				       "returned %d after %lld msecs\n",
 				       it->func, it->caller, it->result,
@@ -75,7 +76,7 @@ struct tracer boot_tracer __read_mostly 
 void trace_boot(struct boot_trace *it)
 {
 	struct ring_buffer_event *event;
-	struct trace_entry *entry;
+	struct trace_boot *entry;
 	struct trace_array_cpu *data;
 	unsigned long irq_flags;
 	struct trace_array *tr = boot_trace;
@@ -91,9 +92,9 @@ void trace_boot(struct boot_trace *it)
 	if (!event)
 		goto out;
 	entry	= ring_buffer_event_data(event);
-	tracing_generic_entry_update(entry, 0);
-	entry->type = TRACE_BOOT;
-	entry->field.initcall = *it;
+	tracing_generic_entry_update(&entry->ent, 0);
+	entry->ent.type = TRACE_BOOT;
+	entry->initcall = *it;
 	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
 
 	trace_wake_up();

-- 

Re: [PATCH 6/6] ftrace: take advantage of variable length entries

[Pekka Paalanen]

Hi Steven,

This is great news. I have some questions below.


On Mon, 29 Sep 2008 23:02:42 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> Now that the underlining ring buffer for ftrace now hold variable length
> entries, we can take advantage of this by only storing the size of the
> actual event into the buffer. This happens to increase the number of
> entries in the buffer dramatically.

I've read this paragraph over and over, and I can't really understand
"only storing the size of the ... event". Maybe you are trying to say
that now we are not consuming more ring space than the actual size of
the event?

Oh! I misunderstood also the last sentence, it's not generating extra
entries but there is room for more entries than before.


> We can also get rid of the "trace_cont" operation, but I'm keeping that
> until we have no more users. Some of the ftrace tracers can now change
> their code to adapt to this new feature.
> 
> CC: Pekka Paalanen <pq@iki.fi>
> CC: Frederic Weisbecker <fweisbec@gmail.com>
> Signed-off-by: Steven Rostedt <srostedt@redhat.com>
> ---
>  kernel/trace/trace.c           |  441 +++++++++++++++++++++--------------------
>  kernel/trace/trace.h           |   81 +++----
>  kernel/trace/trace_boot.c      |   13 -
>  kernel/trace/trace_mmiotrace.c |   31 +-
>  4 files changed, 302 insertions(+), 264 deletions(-)
> 
...
> Index: linux-tip.git/kernel/trace/trace.h
> ===================================================================
> --- linux-tip.git.orig/kernel/trace/trace.h	2008-09-29 22:27:59.000000000 -0400
> +++ linux-tip.git/kernel/trace/trace.h	2008-09-29 22:32:54.000000000 -0400
> @@ -27,9 +27,24 @@ enum trace_type {
>  };
>  
>  /*
> + * The trace entry - the most basic unit of tracing. This is what
> + * is printed in the end as a single line in the trace output, such as:
> + *
> + *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
> + */
> +struct trace_entry {
> +	unsigned char		type;
> +	unsigned char		cpu;
> +	unsigned char		flags;
> +	unsigned char		preempt_count;
> +	int			pid;
> +};
> +
> +/*
>   * Function trace entry - function address and parent function addres:
>   */
>  struct ftrace_entry {
> +	struct trace_entry	ent;
>  	unsigned long		ip;
>  	unsigned long		parent_ip;
>  };
> @@ -39,6 +54,7 @@ extern struct tracer boot_tracer;
>   * Context switch trace entry - which task (and prio) we switched from/to:
>   */
>  struct ctx_switch_entry {
> +	struct trace_entry	ent;
>  	unsigned int		prev_pid;
>  	unsigned char		prev_prio;
>  	unsigned char		prev_state;
> @@ -52,6 +68,7 @@ struct ctx_switch_entry {
>   * Special (free-form) trace entry:
>   */
>  struct special_entry {
> +	struct trace_entry	ent;
>  	unsigned long		arg1;
>  	unsigned long		arg2;
>  	unsigned long		arg3;
> @@ -64,6 +81,7 @@ struct special_entry {
>  #define FTRACE_STACK_ENTRIES	8
>  
>  struct stack_entry {
> +	struct trace_entry	ent;
>  	unsigned long		caller[FTRACE_STACK_ENTRIES];
>  };
>  
> @@ -71,10 +89,34 @@ struct stack_entry {
>   * ftrace_printk entry:
>   */
>  struct print_entry {
> +	struct trace_entry	ent;
>  	unsigned long		ip;
>  	char			buf[];
>  };
>  
> +#define TRACE_OLD_SIZE		88

I'm just wondering, does this hold for both 32- and 64-bit kernels?
Long type is quite common in the structs. I realize this is going
away, so maybe it doesn't even matter.


> +
> +struct trace_field_cont {
> +	unsigned char		type;
> +	/* Temporary till we get rid of this completely */
> +	char			buf[TRACE_OLD_SIZE - 1];
> +};
> +
> +struct trace_mmiotrace_rw {
> +	struct trace_entry	ent;
> +	struct mmiotrace_rw	rw;
> +};
> +
> +struct trace_mmiotrace_map {
> +	struct trace_entry	ent;
> +	struct mmiotrace_map	map;
> +};
> +
> +struct trace_boot {
> +	struct trace_entry	ent;
> +	struct boot_trace	initcall;
> +};
> +
>  /*
>   * trace_flag_type is an enumeration that holds different
>   * states when a trace occurs. These are:
> @@ -92,46 +134,7 @@ enum trace_flag_type {
>  	TRACE_FLAG_CONT			= 0x10,
>  };
>  
> -/*
> - * The trace field - the most basic unit of tracing. This is what
> - * is printed in the end as a single line in the trace output, such as:
> - *
> - *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
> - */
> -struct trace_field {
> -	char			cpu;
> -	char			flags;
> -	char			preempt_count;
> -	int			pid;
> -	union {
> -		struct ftrace_entry		fn;
> -		struct ctx_switch_entry		ctx;
> -		struct special_entry		special;
> -		struct stack_entry		stack;
> -		struct print_entry		print;
> -		struct mmiotrace_rw		mmiorw;
> -		struct mmiotrace_map		mmiomap;
> -		struct boot_trace		initcall;
> -	};
> -};

Finally we get rid of the union :-)


> -
> -struct trace_field_cont {
> -	char				buf[sizeof(struct trace_field)];
> -};
> -
> -struct trace_entry {
> -	char 				type;
> -	union {
> -		struct trace_field	field;
> -		struct trace_field_cont	cont;
> -	};
> -};
> -
> -#define TRACE_ENTRY_SIZE	sizeof(struct trace_entry)
>  #define TRACE_BUF_SIZE		1024
> -#define TRACE_PRINT_BUF_SIZE \
> -	(sizeof(struct trace_field) - offsetof(struct trace_field, print.buf))
> -#define TRACE_CONT_BUF_SIZE	sizeof(struct trace_field)
>  
>  /*
>   * The CPU trace array - it consists of thousands of trace entries
> Index: linux-tip.git/kernel/trace/trace_mmiotrace.c
> ===================================================================
> --- linux-tip.git.orig/kernel/trace/trace_mmiotrace.c	2008-09-29 22:27:59.000000000 -0400
> +++ linux-tip.git/kernel/trace/trace_mmiotrace.c	2008-09-29 22:32:54.000000000 -0400
> @@ -178,14 +178,16 @@ print_out:
>  static int mmio_print_rw(struct trace_iterator *iter)
>  {
>  	struct trace_entry *entry = iter->ent;
> -	struct mmiotrace_rw *rw	= &entry->field.mmiorw;
> +	struct trace_mmiotrace_rw *field =
> +		(struct trace_mmiotrace_rw *)entry;
> +	struct mmiotrace_rw *rw	= &field->rw;
>  	struct trace_seq *s	= &iter->seq;
>  	unsigned long long t	= ns2usecs(iter->ts);
>  	unsigned long usec_rem	= do_div(t, 1000000ULL);
>  	unsigned secs		= (unsigned long)t;
>  	int ret = 1;
>  
> -	switch (entry->field.mmiorw.opcode) {
> +	switch (rw->opcode) {
>  	case MMIO_READ:
>  		ret = trace_seq_printf(s,
>  			"R %d %lu.%06lu %d 0x%llx 0x%lx 0x%lx %d\n",
> @@ -220,14 +222,14 @@ static int mmio_print_rw(struct trace_it
>  static int mmio_print_map(struct trace_iterator *iter)
>  {
>  	struct trace_entry *entry = iter->ent;
> -	struct mmiotrace_map *m	= &entry->field.mmiomap;
> +	struct mmiotrace_map *m	= (struct mmiotrace_map *)entry;

This is different style than above, missing the struct
trace_mmiotrace_map intermediate step. Looks like a bug,
since struct mmiotrace_map is not the first field in
struct trace_mmiotrace_map.


>  	struct trace_seq *s	= &iter->seq;
>  	unsigned long long t	= ns2usecs(iter->ts);
>  	unsigned long usec_rem	= do_div(t, 1000000ULL);
>  	unsigned secs		= (unsigned long)t;
>  	int ret = 1;
>  
> -	switch (entry->field.mmiorw.opcode) {
> +	switch (m->opcode) {
>  	case MMIO_PROBE:
>  		ret = trace_seq_printf(s,
>  			"MAP %lu.%06lu %d 0x%llx 0x%lx 0x%lx 0x%lx %d\n",
> @@ -252,7 +254,8 @@ static int mmio_print_map(struct trace_i
>  static int mmio_print_mark(struct trace_iterator *iter)
>  {
>  	struct trace_entry *entry = iter->ent;
> -	const char *msg		= entry->field.print.buf;
> +	struct print_entry *print = (struct print_entry *)entry;
> +	const char *msg		= print->buf;
>  	struct trace_seq *s	= &iter->seq;
>  	unsigned long long t	= ns2usecs(iter->ts);
>  	unsigned long usec_rem	= do_div(t, 1000000ULL);
> @@ -264,7 +267,7 @@ static int mmio_print_mark(struct trace_
>  	if (!ret)
>  		return 0;
>  
> -	if (entry->field.flags & TRACE_FLAG_CONT)
> +	if (entry->flags & TRACE_FLAG_CONT)
>  		trace_seq_print_cont(s, iter);

If we have variable length entries, doesn't that mean that
print_entry::buf will always hold the full nil-terminated message,
and that we could simply remove all the trace_seq_print_cont()
calls?

In fact, TRACE_FLAG_CONT will never be set. I didn't dig up the
other patches to verify, but trace_vprintk() isn't setting it
anymore.


>  
>  	return 1;
> @@ -308,7 +311,7 @@ static void __trace_mmiotrace_rw(struct 
>  				struct mmiotrace_rw *rw)
>  {
>  	struct ring_buffer_event *event;
> -	struct trace_entry *entry;
> +	struct trace_mmiotrace_rw *entry;
>  	unsigned long irq_flags;
>  
>  	event	= ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
> @@ -316,9 +319,9 @@ static void __trace_mmiotrace_rw(struct 
>  	if (!event)
>  		return;
>  	entry	= ring_buffer_event_data(event);
> -	tracing_generic_entry_update(entry, 0);
> -	entry->type			= TRACE_MMIO_RW;
> -	entry->field.mmiorw		= *rw;
> +	tracing_generic_entry_update(&entry->ent, 0);
> +	entry->ent.type			= TRACE_MMIO_RW;
> +	entry->rw			= *rw;
>  	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
>  
>  	trace_wake_up();
> @@ -336,7 +339,7 @@ static void __trace_mmiotrace_map(struct
>  				struct mmiotrace_map *map)
>  {
>  	struct ring_buffer_event *event;
> -	struct trace_entry *entry;
> +	struct trace_mmiotrace_map *entry;
>  	unsigned long irq_flags;
>  
>  	event	= ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
> @@ -344,9 +347,9 @@ static void __trace_mmiotrace_map(struct
>  	if (!event)
>  		return;
>  	entry	= ring_buffer_event_data(event);
> -	tracing_generic_entry_update(entry, 0);
> -	entry->type			= TRACE_MMIO_MAP;
> -	entry->field.mmiomap		= *map;
> +	tracing_generic_entry_update(&entry->ent, 0);
> +	entry->ent.type			= TRACE_MMIO_MAP;
> +	entry->map			= *map;
>  	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
>  
>  	trace_wake_up();

On the mmiotrace part, I don't see anything wrong here apart
from that one bug.


Thanks.

-- 
Pekka Paalanen
http://www.iki.fi/pq/

Re: [PATCH 6/6] ftrace: take advantage of variable length entries

[Steven Rostedt]

On Tue, 30 Sep 2008, Pekka Paalanen wrote:

> Hi Steven,
> 
> This is great news. I have some questions below.

Thanks!

> On Mon, 29 Sep 2008 23:02:42 -0400
> Steven Rostedt <rostedt@goodmis.org> wrote:
> 
> > Now that the underlining ring buffer for ftrace now hold variable length
> > entries, we can take advantage of this by only storing the size of the
> > actual event into the buffer. This happens to increase the number of
> > entries in the buffer dramatically.
> 
> I've read this paragraph over and over, and I can't really understand
> "only storing the size of the ... event". Maybe you are trying to say
> that now we are not consuming more ring space than the actual size of
> the event?
> 
> Oh! I misunderstood also the last sentence, it's not generating extra
> entries but there is room for more entries than before.

Yeah, it means that we can now store more entries with the same space.

> >  
> > @@ -71,10 +89,34 @@ struct stack_entry {
> >   * ftrace_printk entry:
> >   */
> >  struct print_entry {
> > +	struct trace_entry	ent;
> >  	unsigned long		ip;
> >  	char			buf[];
> >  };
> >  
> > +#define TRACE_OLD_SIZE		88
> 
> I'm just wondering, does this hold for both 32- and 64-bit kernels?
> Long type is quite common in the structs. I realize this is going
> away, so maybe it doesn't even matter.

I believe 88 was what I came up with on x86_64. It was just a size to
pick out of the blue and has no real meaning. I'm not sure anyone uses it
but before I hacked it away, I wanted to make sure.

> > -/*
> > - * The trace field - the most basic unit of tracing. This is what
> > - * is printed in the end as a single line in the trace output, such as:
> > - *
> > - *     bash-15816 [01]   235.197585: idle_cpu <- irq_enter
> > - */
> > -struct trace_field {
> > -	char			cpu;
> > -	char			flags;
> > -	char			preempt_count;
> > -	int			pid;
> > -	union {
> > -		struct ftrace_entry		fn;
> > -		struct ctx_switch_entry		ctx;
> > -		struct special_entry		special;
> > -		struct stack_entry		stack;
> > -		struct print_entry		print;
> > -		struct mmiotrace_rw		mmiorw;
> > -		struct mmiotrace_map		mmiomap;
> > -		struct boot_trace		initcall;
> > -	};
> > -};
> 
> Finally we get rid of the union :-)

Yeah, this is my favorite part of the patch.

> >  		ret = trace_seq_printf(s,
> >  			"R %d %lu.%06lu %d 0x%llx 0x%lx 0x%lx %d\n",
> > @@ -220,14 +222,14 @@ static int mmio_print_rw(struct trace_it
> >  static int mmio_print_map(struct trace_iterator *iter)
> >  {
> >  	struct trace_entry *entry = iter->ent;
> > -	struct mmiotrace_map *m	= &entry->field.mmiomap;
> > +	struct mmiotrace_map *m	= (struct mmiotrace_map *)entry;
> 
> This is different style than above, missing the struct
> trace_mmiotrace_map intermediate step. Looks like a bug,
> since struct mmiotrace_map is not the first field in
> struct trace_mmiotrace_map.

Crap! yes this is a bug. Thanks for pointing this out.

> > @@ -252,7 +254,8 @@ static int mmio_print_map(struct trace_i
> >  static int mmio_print_mark(struct trace_iterator *iter)
> >  {
> >  	struct trace_entry *entry = iter->ent;
> > -	const char *msg		= entry->field.print.buf;
> > +	struct print_entry *print = (struct print_entry *)entry;
> > +	const char *msg		= print->buf;
> >  	struct trace_seq *s	= &iter->seq;
> >  	unsigned long long t	= ns2usecs(iter->ts);
> >  	unsigned long usec_rem	= do_div(t, 1000000ULL);
> > @@ -264,7 +267,7 @@ static int mmio_print_mark(struct trace_
> >  	if (!ret)
> >  		return 0;
> >  
> > -	if (entry->field.flags & TRACE_FLAG_CONT)
> > +	if (entry->flags & TRACE_FLAG_CONT)
> >  		trace_seq_print_cont(s, iter);
> 
> If we have variable length entries, doesn't that mean that
> print_entry::buf will always hold the full nil-terminated message,
> and that we could simply remove all the trace_seq_print_cont()
> calls?
> 
> In fact, TRACE_FLAG_CONT will never be set. I didn't dig up the
> other patches to verify, but trace_vprintk() isn't setting it
> anymore.

This patch is bringing us to the stage to get rid of the CONT flag.
I kept this in just to not break more than I need to ;-)

> > @@ -336,7 +339,7 @@ static void __trace_mmiotrace_map(struct
> >  				struct mmiotrace_map *map)
> >  {
> >  	struct ring_buffer_event *event;
> > -	struct trace_entry *entry;
> > +	struct trace_mmiotrace_map *entry;
> >  	unsigned long irq_flags;
> >  
> >  	event	= ring_buffer_lock_reserve(tr->buffer, sizeof(*entry),
> > @@ -344,9 +347,9 @@ static void __trace_mmiotrace_map(struct
> >  	if (!event)
> >  		return;
> >  	entry	= ring_buffer_event_data(event);
> > -	tracing_generic_entry_update(entry, 0);
> > -	entry->type			= TRACE_MMIO_MAP;
> > -	entry->field.mmiomap		= *map;
> > +	tracing_generic_entry_update(&entry->ent, 0);
> > +	entry->ent.type			= TRACE_MMIO_MAP;
> > +	entry->map			= *map;
> >  	ring_buffer_unlock_commit(tr->buffer, event, irq_flags);
> >  
> >  	trace_wake_up();
> 
> On the mmiotrace part, I don't see anything wrong here apart
> from that one bug.

Thanks, I'll add a patch to my coming queue to handle this.

-- Steve

Re: [PATCH 6/6] ftrace: take advantage of variable length entries

[Steven Rostedt]

On Tue, 30 Sep 2008, Steven Rostedt wrote:
> > On the mmiotrace part, I don't see anything wrong here apart
> > from that one bug.
> 
> Thanks, I'll add a patch to my coming queue to handle this.

Bah, I lied. The new locking design took a bit more time to do than 
I expected, and I forgot to add this fix. I'll add it tomorrow.

Thanks,

-- Steve

Re: [PATCH 6/6] ftrace: take advantage of variable length entries

[Ingo Molnar]

* Steven Rostedt <rostedt@goodmis.org> wrote:

> > >  	struct trace_entry *entry = iter->ent;
> > > -	struct mmiotrace_map *m	= &entry->field.mmiomap;
> > > +	struct mmiotrace_map *m	= (struct mmiotrace_map *)entry;
> > 
> > This is different style than above, missing the struct
> > trace_mmiotrace_map intermediate step. Looks like a bug,
> > since struct mmiotrace_map is not the first field in
> > struct trace_mmiotrace_map.
> 
> Crap! yes this is a bug. Thanks for pointing this out.

hm, there's a significant amount of type casts, see the grep below.

The ringbuffer becoming type-opaque has exactly these kinds of dangers, 
and as i suggested a few days ago, please think about a debug mode that 
stores the record type in the trace entry and validates it on extraction 
or something like that.

That might even be a robustness feature: the tracer should not crash if 
the trace buffer gets corrupted. ftrace had that invariant before, i 
think we should try to keep as many aspects of it as possible.

	Ingo

------------->
ring_buffer.c:		page = (struct buffer_page *)virt_to_page(addr);
ring_buffer.c:	cpu_buffer->reader_page = (struct buffer_page *)virt_to_page(addr);
ring_buffer.c:static void rb_reset_cpu(struct ring_buffer_per_cpu *cpu_buffer);
ring_buffer.c:			page = (struct buffer_page *)virt_to_page(addr);
trace_boot.c:	struct trace_boot *field = (struct trace_boot *)entry;
trace.c:static DEFINE_PER_CPU(struct trace_array_cpu, global_trace_cpu);
trace.c:static DEFINE_PER_CPU(struct trace_array_cpu, max_data);
trace.c:		cont = (struct trace_field_cont *)ent;
trace.c:		struct ftrace_entry *field = (struct ftrace_entry *)entry;
trace.c:			(struct ctx_switch_entry *)entry;
trace.c:		struct special_entry *field = (struct special_entry *)entry;
trace.c:		struct stack_entry *field = (struct stack_entry *)entry;
trace.c:		struct print_entry *field = (struct print_entry *)entry;
trace.c:		struct ftrace_entry *field = (struct ftrace_entry *)entry;
trace.c:			(struct ctx_switch_entry *)entry;
trace.c:		struct special_entry *field = (struct special_entry *)entry;
trace.c:		struct stack_entry *field = (struct stack_entry *)entry;
trace.c:		struct print_entry *field = (struct print_entry *)entry;
trace.c:		struct ftrace_entry *field = (struct ftrace_entry *)entry;
trace.c:			(struct ctx_switch_entry *)entry;
trace.c:		struct special_entry *field = (struct special_entry *)entry;
trace.c:		struct print_entry *field = (struct print_entry *)entry;
trace.c:		struct ftrace_entry *field = (struct ftrace_entry *)entry;
trace.c:			(struct ctx_switch_entry *)entry;
trace.c:		struct special_entry *field = (struct special_entry *)entry;
trace.c:		struct ftrace_entry *field = (struct ftrace_entry *)entry;
trace.c:			(struct ctx_switch_entry *)entry;
trace.c:		struct special_entry *field = (struct special_entry *)entry;
trace.c:	struct seq_file *m = (struct seq_file *)file->private_data;
trace.c:	       offsetof(struct trace_iterator, seq));
trace.c:		       offsetof(struct trace_iterator, seq));
trace_mmiotrace.c:		(struct trace_mmiotrace_rw *)entry;
trace_mmiotrace.c:	struct mmiotrace_map *m	= (struct mmiotrace_map *)entry;
trace_mmiotrace.c:	struct print_entry *print = (struct print_entry *)entry;
trace_sched_wakeup.c:static void __wakeup_reset(struct trace_array *tr);
trace_sysprof.c:static DEFINE_PER_CPU(struct hrtimer, stack_trace_hrtimer);
trace_sysprof.c:	stack = ((char *)regs + sizeof(struct pt_regs));
trace_sysprof.c:		regs = (struct pt_regs *)current->thread.sp0 - 1;

Re: [PATCH 6/6] ftrace: take advantage of variable length entries

[Steven Rostedt]

On Wed, 1 Oct 2008, Ingo Molnar wrote:
> 
> * Steven Rostedt <rostedt@goodmis.org> wrote:
> 
> > > >  	struct trace_entry *entry = iter->ent;
> > > > -	struct mmiotrace_map *m	= &entry->field.mmiomap;
> > > > +	struct mmiotrace_map *m	= (struct mmiotrace_map *)entry;
> > > 
> > > This is different style than above, missing the struct
> > > trace_mmiotrace_map intermediate step. Looks like a bug,
> > > since struct mmiotrace_map is not the first field in
> > > struct trace_mmiotrace_map.
> > 
> > Crap! yes this is a bug. Thanks for pointing this out.
> 
> hm, there's a significant amount of type casts, see the grep below.

Yeah, I don't like that either.

> 
> The ringbuffer becoming type-opaque has exactly these kinds of dangers, 
> and as i suggested a few days ago, please think about a debug mode that 
> stores the record type in the trace entry and validates it on extraction 
> or something like that.
> 
> That might even be a robustness feature: the tracer should not crash if 
> the trace buffer gets corrupted. ftrace had that invariant before, i 
> think we should try to keep as many aspects of it as possible.

Although the ring buffer is type opaque, that isn't the cause of this 
issue. Ftrace still adds the types as needed. But since we no longer have 
the big "one type for all" union entry, we need to be a bit more careful. 
All types start with a one byte type id (giving us 255 types to use for 
ftrace, zero being saved).

The following patch fixes this bug and addresses the issue.

-- Steve

[PATCH] ftrace: type cast verifier

[Steven Rostedt]

The mmiotrace map had a bug that would typecast the entry from
the trace to the wrong type.

This patch adds a macro to assign all entries of ftrace using the type
of the variable and checking the entry id. The typecasts are now done
in the macro for only those types that it knows about, which should
be all the types that are allowed to be read from the tracer.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 kernel/trace/trace.c           |   85 ++++++++++++++++++++++++++++-------------
 kernel/trace/trace.h           |   42 ++++++++++++++++++++
 kernel/trace/trace_mmiotrace.c |   14 ++++--
 3 files changed, 112 insertions(+), 29 deletions(-)

Index: linux-tip.git/kernel/trace/trace.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace.c	2008-10-01 10:41:27.000000000 -0400
+++ linux-tip.git/kernel/trace/trace.c	2008-10-01 10:41:59.000000000 -0400
@@ -1350,7 +1350,9 @@ print_lat_fmt(struct trace_iterator *ite
 	}
 	switch (entry->type) {
 	case TRACE_FN: {
-		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+		struct ftrace_entry *field;
+
+		trace_assign_type(field, entry);
 
 		seq_print_ip_sym(s, field->ip, sym_flags);
 		trace_seq_puts(s, " (");
@@ -1363,8 +1365,9 @@ print_lat_fmt(struct trace_iterator *ite
 	}
 	case TRACE_CTX:
 	case TRACE_WAKE: {
-		struct ctx_switch_entry *field =
-			(struct ctx_switch_entry *)entry;
+		struct ctx_switch_entry *field;
+
+		trace_assign_type(field, entry);
 
 		T = field->next_state < sizeof(state_to_char) ?
 			state_to_char[field->next_state] : 'X';
@@ -1384,7 +1387,9 @@ print_lat_fmt(struct trace_iterator *ite
 		break;
 	}
 	case TRACE_SPECIAL: {
-		struct special_entry *field = (struct special_entry *)entry;
+		struct special_entry *field;
+
+		trace_assign_type(field, entry);
 
 		trace_seq_printf(s, "# %ld %ld %ld\n",
 				 field->arg1,
@@ -1393,7 +1398,9 @@ print_lat_fmt(struct trace_iterator *ite
 		break;
 	}
 	case TRACE_STACK: {
-		struct stack_entry *field = (struct stack_entry *)entry;
+		struct stack_entry *field;
+
+		trace_assign_type(field, entry);
 
 		for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
 			if (i)
@@ -1404,7 +1411,9 @@ print_lat_fmt(struct trace_iterator *ite
 		break;
 	}
 	case TRACE_PRINT: {
-		struct print_entry *field = (struct print_entry *)entry;
+		struct print_entry *field;
+
+		trace_assign_type(field, entry);
 
 		seq_print_ip_sym(s, field->ip, sym_flags);
 		trace_seq_printf(s, ": %s", field->buf);
@@ -1454,7 +1463,9 @@ static enum print_line_t print_trace_fmt
 
 	switch (entry->type) {
 	case TRACE_FN: {
-		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+		struct ftrace_entry *field;
+
+		trace_assign_type(field, entry);
 
 		ret = seq_print_ip_sym(s, field->ip, sym_flags);
 		if (!ret)
@@ -1480,8 +1491,9 @@ static enum print_line_t print_trace_fmt
 	}
 	case TRACE_CTX:
 	case TRACE_WAKE: {
-		struct ctx_switch_entry *field =
-			(struct ctx_switch_entry *)entry;
+		struct ctx_switch_entry *field;
+
+		trace_assign_type(field, entry);
 
 		S = field->prev_state < sizeof(state_to_char) ?
 			state_to_char[field->prev_state] : 'X';
@@ -1501,7 +1513,9 @@ static enum print_line_t print_trace_fmt
 		break;
 	}
 	case TRACE_SPECIAL: {
-		struct special_entry *field = (struct special_entry *)entry;
+		struct special_entry *field;
+
+		trace_assign_type(field, entry);
 
 		ret = trace_seq_printf(s, "# %ld %ld %ld\n",
 				 field->arg1,
@@ -1512,7 +1526,9 @@ static enum print_line_t print_trace_fmt
 		break;
 	}
 	case TRACE_STACK: {
-		struct stack_entry *field = (struct stack_entry *)entry;
+		struct stack_entry *field;
+
+		trace_assign_type(field, entry);
 
 		for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
 			if (i) {
@@ -1531,7 +1547,9 @@ static enum print_line_t print_trace_fmt
 		break;
 	}
 	case TRACE_PRINT: {
-		struct print_entry *field = (struct print_entry *)entry;
+		struct print_entry *field;
+
+		trace_assign_type(field, entry);
 
 		seq_print_ip_sym(s, field->ip, sym_flags);
 		trace_seq_printf(s, ": %s", field->buf);
@@ -1562,7 +1580,9 @@ static enum print_line_t print_raw_fmt(s
 
 	switch (entry->type) {
 	case TRACE_FN: {
-		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+		struct ftrace_entry *field;
+
+		trace_assign_type(field, entry);
 
 		ret = trace_seq_printf(s, "%x %x\n",
 					field->ip,
@@ -1573,8 +1593,9 @@ static enum print_line_t print_raw_fmt(s
 	}
 	case TRACE_CTX:
 	case TRACE_WAKE: {
-		struct ctx_switch_entry *field =
-			(struct ctx_switch_entry *)entry;
+		struct ctx_switch_entry *field;
+
+		trace_assign_type(field, entry);
 
 		S = field->prev_state < sizeof(state_to_char) ?
 			state_to_char[field->prev_state] : 'X';
@@ -1596,7 +1617,9 @@ static enum print_line_t print_raw_fmt(s
 	}
 	case TRACE_SPECIAL:
 	case TRACE_STACK: {
-		struct special_entry *field = (struct special_entry *)entry;
+		struct special_entry *field;
+
+		trace_assign_type(field, entry);
 
 		ret = trace_seq_printf(s, "# %ld %ld %ld\n",
 				 field->arg1,
@@ -1607,7 +1630,9 @@ static enum print_line_t print_raw_fmt(s
 		break;
 	}
 	case TRACE_PRINT: {
-		struct print_entry *field = (struct print_entry *)entry;
+		struct print_entry *field;
+
+		trace_assign_type(field, entry);
 
 		trace_seq_printf(s, "# %lx %s", field->ip, field->buf);
 		if (entry->flags & TRACE_FLAG_CONT)
@@ -1648,7 +1673,9 @@ static enum print_line_t print_hex_fmt(s
 
 	switch (entry->type) {
 	case TRACE_FN: {
-		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+		struct ftrace_entry *field;
+
+		trace_assign_type(field, entry);
 
 		SEQ_PUT_HEX_FIELD_RET(s, field->ip);
 		SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
@@ -1656,8 +1683,9 @@ static enum print_line_t print_hex_fmt(s
 	}
 	case TRACE_CTX:
 	case TRACE_WAKE: {
-		struct ctx_switch_entry *field =
-			(struct ctx_switch_entry *)entry;
+		struct ctx_switch_entry *field;
+
+		trace_assign_type(field, entry);
 
 		S = field->prev_state < sizeof(state_to_char) ?
 			state_to_char[field->prev_state] : 'X';
@@ -1676,7 +1704,9 @@ static enum print_line_t print_hex_fmt(s
 	}
 	case TRACE_SPECIAL:
 	case TRACE_STACK: {
-		struct special_entry *field = (struct special_entry *)entry;
+		struct special_entry *field;
+
+		trace_assign_type(field, entry);
 
 		SEQ_PUT_HEX_FIELD_RET(s, field->arg1);
 		SEQ_PUT_HEX_FIELD_RET(s, field->arg2);
@@ -1705,15 +1735,18 @@ static enum print_line_t print_bin_fmt(s
 
 	switch (entry->type) {
 	case TRACE_FN: {
-		struct ftrace_entry *field = (struct ftrace_entry *)entry;
+		struct ftrace_entry *field;
+
+		trace_assign_type(field, entry);
 
 		SEQ_PUT_FIELD_RET(s, field->ip);
 		SEQ_PUT_FIELD_RET(s, field->parent_ip);
 		break;
 	}
 	case TRACE_CTX: {
-		struct ctx_switch_entry *field =
-			(struct ctx_switch_entry *)entry;
+		struct ctx_switch_entry *field;
+
+		trace_assign_type(field, entry);
 
 		SEQ_PUT_FIELD_RET(s, field->prev_pid);
 		SEQ_PUT_FIELD_RET(s, field->prev_prio);
@@ -1725,7 +1758,9 @@ static enum print_line_t print_bin_fmt(s
 	}
 	case TRACE_SPECIAL:
 	case TRACE_STACK: {
-		struct special_entry *field = (struct special_entry *)entry;
+		struct special_entry *field;
+
+		trace_assign_type(field, entry);
 
 		SEQ_PUT_FIELD_RET(s, field->arg1);
 		SEQ_PUT_FIELD_RET(s, field->arg2);
Index: linux-tip.git/kernel/trace/trace.h
===================================================================
--- linux-tip.git.orig/kernel/trace/trace.h	2008-10-01 10:41:27.000000000 -0400
+++ linux-tip.git/kernel/trace/trace.h	2008-10-01 10:41:59.000000000 -0400
@@ -177,6 +177,48 @@ struct trace_array {
 	struct trace_array_cpu	*data[NR_CPUS];
 };
 
+#define FTRACE_CMP_TYPE(var, type) \
+	__builtin_types_compatible_p(typeof(var), type *)
+
+#undef IF_ASSIGN
+#define IF_ASSIGN(var, entry, etype, id)		\
+	if (FTRACE_CMP_TYPE(var, etype)) {		\
+		var = (typeof(var))(entry);		\
+		WARN_ON(id && (entry)->type != id);	\
+		break;					\
+	}
+
+/* Will cause compile errors if type is not found. */
+extern void __ftrace_bad_type(void);
+
+/*
+ * The trace_assign_type is a verifier that the entry type is
+ * the same as the type being assigned. To add new types simply
+ * add a line with the following format:
+ *
+ * IF_ASSIGN(var, ent, type, id);
+ *
+ *  Where "type" is the trace type that includes the trace_entry
+ *  as the "ent" item. And "id" is the trace identifier that is
+ *  used in the trace_type enum.
+ *
+ *  If the type can have more than one id, then use zero.
+ */
+#define trace_assign_type(var, ent)					\
+	do {								\
+		IF_ASSIGN(var, ent, struct ftrace_entry, TRACE_FN);	\
+		IF_ASSIGN(var, ent, struct ctx_switch_entry, 0);	\
+		IF_ASSIGN(var, ent, struct trace_field_cont, TRACE_CONT); \
+		IF_ASSIGN(var, ent, struct stack_entry, TRACE_STACK);	\
+		IF_ASSIGN(var, ent, struct print_entry, TRACE_PRINT);	\
+		IF_ASSIGN(var, ent, struct special_entry, 0);		\
+		IF_ASSIGN(var, ent, struct trace_mmiotrace_rw,		\
+			  TRACE_MMIO_RW);				\
+		IF_ASSIGN(var, ent, struct trace_mmiotrace_map,		\
+			  TRACE_MMIO_MAP);				\
+		IF_ASSIGN(var, ent, struct trace_boot, TRACE_BOOT);	\
+		__ftrace_bad_type();					\
+	} while (0)
 
 /* Return values for print_line callback */
 enum print_line_t {
Index: linux-tip.git/kernel/trace/trace_mmiotrace.c
===================================================================
--- linux-tip.git.orig/kernel/trace/trace_mmiotrace.c	2008-10-01 10:41:27.000000000 -0400
+++ linux-tip.git/kernel/trace/trace_mmiotrace.c	2008-10-01 10:41:59.000000000 -0400
@@ -178,15 +178,17 @@ print_out:
 static enum print_line_t mmio_print_rw(struct trace_iterator *iter)
 {
 	struct trace_entry *entry = iter->ent;
-	struct trace_mmiotrace_rw *field =
-		(struct trace_mmiotrace_rw *)entry;
-	struct mmiotrace_rw *rw	= &field->rw;
+	struct trace_mmiotrace_rw *field;
+	struct mmiotrace_rw *rw;
 	struct trace_seq *s	= &iter->seq;
 	unsigned long long t	= ns2usecs(iter->ts);
 	unsigned long usec_rem	= do_div(t, 1000000ULL);
 	unsigned secs		= (unsigned long)t;
 	int ret = 1;
 
+	trace_assign_type(field, entry);
+	rw = &field->rw;
+
 	switch (rw->opcode) {
 	case MMIO_READ:
 		ret = trace_seq_printf(s,
@@ -222,13 +224,17 @@ static enum print_line_t mmio_print_rw(s
 static enum print_line_t mmio_print_map(struct trace_iterator *iter)
 {
 	struct trace_entry *entry = iter->ent;
-	struct mmiotrace_map *m	= (struct mmiotrace_map *)entry;
+	struct trace_mmiotrace_map *field;
+	struct mmiotrace_map *m;
 	struct trace_seq *s	= &iter->seq;
 	unsigned long long t	= ns2usecs(iter->ts);
 	unsigned long usec_rem	= do_div(t, 1000000ULL);
 	unsigned secs		= (unsigned long)t;
 	int ret;
 
+	trace_assign_type(field, entry);
+	m = &field->map;
+
 	switch (m->opcode) {
 	case MMIO_PROBE:
 		ret = trace_seq_printf(s,

Re: [PATCH] ftrace: type cast verifier

[Ingo Molnar]

* Steven Rostedt <rostedt@goodmis.org> wrote:

> +#define FTRACE_CMP_TYPE(var, type) \
> +	__builtin_types_compatible_p(typeof(var), type *)

ah, the -rt type trick ;-)

i'd suggest one more small detail:

> +	struct trace_mmiotrace_map *field;
> +	struct mmiotrace_map *m;

> +	trace_assign_type(field, entry);

could you rename it to trace_type() - that way the initialization could 
be written in a more compact way as:

> +	struct trace_mmiotrace_map *field = trace_type(field, entry);

[ NOTE: there's namespace clash with a local symbol in ./trace_irqsoff.c 
  and a trace_type enum as well ]

	Ingo

Re: [PATCH] ftrace: type cast verifier

[Ingo Molnar]

* Ingo Molnar <mingo@elte.hu> wrote:

> could you rename it to trace_type() - that way the initialization could 
> be written in a more compact way as:
> 
> > +	struct trace_mmiotrace_map *field = trace_type(field, entry);

ah, it cannot be done that way, as 'field' has to be known to the 
compiler.

so your patch is fine as-is, the extra line is an acceptable cost, as we 
get:

- the type filter (trying to cast an object outside of the narrow list 
  of trace entry types will cause a failed build - i.e. most of the 
  practical dangers of C type casting are avoided!)

- the runtime entry type checker

	Ingo

Re: [PATCH 0/6] ftrace: port to the new ring_buffer

[Ingo Molnar]

* Steven Rostedt <rostedt@goodmis.org> wrote:

> These patches are against linux-tip.
> 
> The first is just a fix in the wakeup selftest.
> 
> The next is a port of the Unified tracer buffer to linux-tip and some 
> updates.
> 
> After that is the ftrace port to use the ring buffer, followed by some 
> more enhancements to ftrace because of the new variable length buffer.
> 
> I tried a few configurations and tried to test all the different 
> ftrace tracers, but I'm sure there may be some bugs still to work out. 
> I worked out all those that I found.

very nice! I'd expect breakages and complications too so i restructured 
tip/tracing/* a bit: firstly i created a tip/tracing/core append-only 
merge branch which collects all the known-robust bits. Then i created a 
new branch for your new generic ring-buffer feature: 
tip/tracing/ring-buffer, and applied your patches. I've started testing 
it.

Once we declare it OK, it can be merged into tip/tracing/core.

> But, with the ring_buffer I can envision several ways to clean up 
> ftrace and to make adding new tracers cleaner.
> 
> I'm also thinking about making a way that each tracer can allocate its 
> own buffer, and allow for more than one tracer to be running at the 
> same time! (only with different buffers).

yeah. Ideally this should just fall out of the generic framework - i.e. 
tracer plugins should not have to do anything extra to get per tracer 
buffers. They should just add their own specialistic flavor, there 
should be no repetitions otherwise. (barring cases where a tracer wants 
to deviate from default behavior)

	Ingo

Re: [PATCH 0/6] ftrace: port to the new ring_buffer

[Ingo Molnar]

[-- Attachment #1: Type: text/plain, Size: 3675 bytes --]


* Ingo Molnar <mingo@elte.hu> wrote:

> very nice! I'd expect breakages and complications too so i 
> restructured tip/tracing/* a bit: firstly i created a tip/tracing/core 
> append-only merge branch which collects all the known-robust bits. 
> Then i created a new branch for your new generic ring-buffer feature: 
> tip/tracing/ring-buffer, and applied your patches. I've started 
> testing it.

-tip testing found that tip/tracing/ring-buffer causes a new lockdep 
splat:

[    0.000000] Linux version 2.6.27-rc8-tip-00915-g8cb18a9-dirty (mingo@dione)
               (gcc version 4.2.3) #37501 SMP Tue Sep 30 10:10:10 CEST 2008
[...]
[    0.268001] calling  tracer_alloc_buffers+0x0/0x1e5 @ 1
[    0.270983] ------------[ cut here ]------------
[    0.271100] WARNING: at kernel/lockdep.c:2880 check_flags+0x63/0x179()
[    0.271219] Modules linked in:
[    0.271356] Pid: 1, comm: swapper Not tainted 2.6.27-rc8-tip-00915-g8cb18a9-dirty #37501
[    0.271563] Call Trace:
[    0.271678]  [<ffffffff80271d2b>] warn_on_slowpath+0x5d/0x84
[    0.271797]  [<ffffffff80295973>] ? __lock_acquire+0xba4/0xbc5
[    0.271916]  [<ffffffff8029266d>] ? __raw_spin_is_locked+0x17/0x1a
[    0.272001]  [<ffffffff802929cc>] ? graph_unlock+0x79/0x7e
[    0.272001]  [<ffffffff8029449f>] ? mark_lock+0x1c/0x361
[    0.272001]  [<ffffffff8029483a>] ? mark_held_locks+0x56/0x71
[    0.272001]  [<ffffffff802cbb77>] ? time_hardirqs_off+0x12/0x26
[    0.272001]  [<ffffffff802934f1>] ? trace_hardirqs_off_caller+0x21/0xc2
[    0.272001]  [<ffffffff802927c3>] check_flags+0x63/0x179
[    0.272001]  [<ffffffff802966a1>] lock_acquire+0x51/0xc2
[    0.272001]  [<ffffffff816fcead>] _spin_lock+0x36/0x65
[    0.272001]  [<ffffffff802c7511>] ? ring_buffer_reset_cpu+0x47/0x6b
[    0.272001]  [<ffffffff802c7511>] ring_buffer_reset_cpu+0x47/0x6b
[    0.272001]  [<ffffffff802ca33f>] tracing_reset+0xc/0xe
[    0.272001]  [<ffffffff802cd0b4>] boot_trace_init+0x2a/0x46
[    0.272001]  [<ffffffff826817c3>] tracer_alloc_buffers+0x1a7/0x1e5
[    0.272001]  [<ffffffff8268161c>] ? tracer_alloc_buffers+0x0/0x1e5
[    0.272001]  [<ffffffff8020a062>] do_one_initcall+0x62/0x165
[    0.272001]  [<ffffffff816f3291>] ? print_cpu_info+0xab/0x135
[    0.272001]  [<ffffffff8024d8aa>] ? get_apic_id+0x0/0x13
[    0.272001]  [<ffffffff8268161c>] ? tracer_alloc_buffers+0x0/0x1e5
[    0.272001]  [<ffffffff8266190c>] kernel_init+0x60/0x21a
[    0.272001]  [<ffffffff8022daf9>] child_rip+0xa/0x11
[    0.272001]  [<ffffffff8022cc83>] ? restore_args+0x0/0x30
[    0.272001]  [<ffffffff802c5d03>] ? ftrace_convert_nops+0x25/0xb0
[    0.272001]  [<ffffffff8023362a>] ? sched_clock+0x17/0x1a
[    0.272001]  [<ffffffff826618ac>] ? kernel_init+0x0/0x21a
[    0.272001]  [<ffffffff8022daef>] ? child_rip+0x0/0x11
[    0.272001] ---[ end trace a7919e7f17c0a725 ]---
[    0.272001] possible reason: unannotated irqs-off.
[    0.272001] irq event stamp: 9069
[    0.272001] hardirqs last  enabled at (9069): [<ffffffff802949bf>] trace_hardirqs_on+0xd/0xf
[    0.272001] hardirqs last disabled at (9068): [<ffffffff8029359f>] trace_hardirqs_off+0xd/0xf
[    0.272001] softirqs last  enabled at (4082): [<ffffffff802773c3>] __do_softirq+0xe0/0xed
[    0.272001] softirqs last disabled at (4075): [<ffffffff8022dfec>] call_softirq+0x1c/0x28
[    0.272010] initcall tracer_alloc_buffers+0x0/0x1e5 returned 0 after 7 msecs
[    0.272409] lockdep: fixing up alternatives.
[    0.272604] Booting processor 1 APIC 0x1 ip 0x6000
[    0.004000] Initializing CPU#1

on a 64-bit allyesconfig bootup. Config attached.

The box booted up fine otherwise, so i'll continue testing the new code, 
to find other problems (if any).

	Ingo

[-- Attachment #2: config --]
[-- Type: text/plain, Size: 88379 bytes --]

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.27-rc8
# Tue Sep 30 10:13:31 2008
#
# CONFIG_64BIT is not set
CONFIG_X86_32=y
# CONFIG_X86_64 is not set
CONFIG_X86=y
CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig"
# CONFIG_GENERIC_LOCKBREAK is not set
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_FAST_CMPXCHG_LOCAL=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_GPIO=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
# CONFIG_GENERIC_TIME_VSYSCALL is not set
CONFIG_ARCH_HAS_CPU_RELAX=y
CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
# CONFIG_HAVE_CPUMASK_OF_CPU_MAP is not set
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
# CONFIG_ZONE_DMA32 is not set
CONFIG_ARCH_POPULATES_NODE_MAP=y
# CONFIG_AUDIT_ARCH is not set
CONFIG_ARCH_SUPPORTS_AOUT=y
CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_X86_SMP=y
CONFIG_X86_32_SMP=y
CONFIG_X86_HT=y
CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_TRAMPOLINE=y
CONFIG_KTIME_SCALAR=y
CONFIG_BOOTPARAM_SUPPORT_NOT_WANTED=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_BOOT_ALLOWED4=y
CONFIG_BROKEN_BOOT_ALLOWED3=y
CONFIG_BROKEN_BOOT_ALLOWED2=y
# CONFIG_BROKEN_BOOT_ALLOWED is not set
# CONFIG_BROKEN_BOOT_EUROPE is not set
# CONFIG_BROKEN_BOOT_TITAN is not set
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
CONFIG_TASK_XACCT=y
CONFIG_TASK_IO_ACCOUNTING=y
CONFIG_AUDIT=y
CONFIG_AUDITSYSCALL=y
CONFIG_AUDIT_TREE=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=21
CONFIG_CGROUPS=y
CONFIG_CGROUP_DEBUG=y
CONFIG_CGROUP_NS=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CPUSETS=y
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
CONFIG_GROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_USER_SCHED=y
# CONFIG_CGROUP_SCHED is not set
CONFIG_CGROUP_CPUACCT=y
CONFIG_RESOURCE_COUNTERS=y
CONFIG_MM_OWNER=y
CONFIG_CGROUP_MEM_RES_CTLR=y
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
CONFIG_PROC_PID_CPUSET=y
CONFIG_RELAY=y
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
CONFIG_USER_NS=y
CONFIG_PID_NS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_FASTBOOT=y
CONFIG_SYSCTL=y
CONFIG_EMBEDDED=y
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
CONFIG_KALLSYMS_EXTRA_PASS=y
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
CONFIG_COMPAT_BRK=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
CONFIG_PROFILING=y
CONFIG_TRACEPOINTS=y
CONFIG_MARKERS=y
CONFIG_OPROFILE=y
CONFIG_OPROFILE_IBS=y
CONFIG_HAVE_OPROFILE=y
CONFIG_KPROBES=y
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_KRETPROBES=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
# CONFIG_HAVE_DMA_ATTRS is not set
CONFIG_USE_GENERIC_SMP_HELPERS=y
# CONFIG_HAVE_CLK is not set
CONFIG_HAVE_DYN_ARRAY=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SRCVERSION_ALL=y
CONFIG_KMOD=y
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
CONFIG_LBD=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_LSF=y
CONFIG_BLK_DEV_BSG=y
CONFIG_BLK_DEV_INTEGRITY=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
CONFIG_PREEMPT_NOTIFIERS=y
CONFIG_CLASSIC_RCU=y

#
# Processor type and features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP_SUPPORT=y
CONFIG_HAVE_SPARSE_IRQ=y
CONFIG_X86_FIND_SMP_CONFIG=y
CONFIG_X86_MPPARSE=y
CONFIG_UP_WANTED_1=y
CONFIG_UP_WANTED_2=y
CONFIG_UP_WANTED=y
CONFIG_SMP=y
CONFIG_X86_PC=y
# CONFIG_X86_ELAN is not set
# CONFIG_X86_VOYAGER is not set
# CONFIG_X86_GENERICARCH is not set
# CONFIG_X86_VSMP is not set
CONFIG_X86_RDC321X=y
CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
CONFIG_PARAVIRT_GUEST=y
CONFIG_VMI=y
CONFIG_KVM_CLOCK=y
CONFIG_KVM_GUEST=y
CONFIG_LGUEST_GUEST=y
CONFIG_PARAVIRT=y
CONFIG_PARAVIRT_CLOCK=y
CONFIG_PARAVIRT_DEBUG=y
CONFIG_MEMTEST=y
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
CONFIG_M686=y
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
# CONFIG_MPSC is not set
# CONFIG_MCORE2 is not set
# CONFIG_GENERIC_CPU is not set
CONFIG_X86_GENERIC=y
CONFIG_X86_CPU=y
CONFIG_X86_CMPXCHG=y
CONFIG_X86_L1_CACHE_SHIFT=7
CONFIG_X86_XADD=y
CONFIG_X86_PPRO_FENCE=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_TSC=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=4
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_PROCESSOR_SELECT=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_CYRIX_32=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_CENTAUR_32=y
CONFIG_CPU_SUP_TRANSMETA_32=y
CONFIG_CPU_SUP_UMC_32=y
CONFIG_X86_DS=y
CONFIG_X86_PTRACE_BTS=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_DMI=y
# CONFIG_IOMMU_HELPER is not set
CONFIG_NR_CPUS=8
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_NONFATAL=y
CONFIG_X86_MCE_P4THERMAL=y
CONFIG_VM86=y
CONFIG_TOSHIBA=y
CONFIG_I8K=y
CONFIG_X86_REBOOTFIXUPS=y
CONFIG_MICROCODE=y
CONFIG_MICROCODE_INTEL=y
CONFIG_MICROCODE_AMD=y
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_VMSPLIT_3G=y
# CONFIG_VMSPLIT_3G_OPT is not set
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_2G_OPT is not set
# CONFIG_VMSPLIT_1G is not set
CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_HIGHMEM=y
# CONFIG_ARCH_PHYS_ADDR_T_64BIT is not set
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ILLEGAL_POINTER_VALUE=0
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_SPARSEMEM_STATIC=y
# CONFIG_SPARSEMEM_VMEMMAP_ENABLE is not set
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_RESOURCES_64BIT=y
# CONFIG_PHYS_ADDR_T_64BIT is not set
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_MMU_NOTIFIER=y
CONFIG_HIGHPTE=y
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK=y
CONFIG_X86_RESERVE_LOW_64K=y
CONFIG_MATH_EMULATION=y
CONFIG_MTRR=y
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=0
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
CONFIG_X86_PAT=y
CONFIG_EFI=y
CONFIG_SECCOMP=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
CONFIG_CRASH_DUMP=y
CONFIG_KEXEC_JUMP=y
CONFIG_PHYSICAL_START=0x100000
CONFIG_RELOCATABLE=y
CONFIG_PHYSICAL_ALIGN=0x100000
CONFIG_HOTPLUG_CPU=y
CONFIG_COMPAT_VDSO=y
CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE=""
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y

#
# Power management options
#
CONFIG_PM=y
CONFIG_PM_DEBUG=y
CONFIG_PM_VERBOSE=y
CONFIG_CAN_PM_TRACE=y
CONFIG_PM_TRACE=y
CONFIG_PM_TRACE_RTC=y
CONFIG_PM_SLEEP_SMP=y
CONFIG_PM_SLEEP=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_HIBERNATION=y
CONFIG_PM_STD_PARTITION=""
CONFIG_ACPI=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_PROCFS=y
CONFIG_ACPI_PROCFS_POWER=y
CONFIG_ACPI_SYSFS_POWER=y
CONFIG_ACPI_PROC_EVENT=y
CONFIG_ACPI_AC=y
CONFIG_ACPI_BATTERY=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_VIDEO=y
CONFIG_ACPI_FAN=y
CONFIG_ACPI_DOCK=y
CONFIG_ACPI_BAY=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_HOTPLUG_CPU=y
CONFIG_ACPI_THERMAL=y
CONFIG_ACPI_WMI=y
CONFIG_ACPI_ASUS=y
CONFIG_ACPI_TOSHIBA=y
# CONFIG_ACPI_CUSTOM_DSDT is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
CONFIG_ACPI_DEBUG=y
CONFIG_ACPI_DEBUG_FUNC_TRACE=y
CONFIG_ACPI_EC=y
CONFIG_ACPI_PCI_SLOT=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_SYSTEM=y
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_CONTAINER=y
CONFIG_ACPI_SBS=y
CONFIG_X86_APM_BOOT=y
CONFIG_APM=y
CONFIG_APM_IGNORE_USER_SUSPEND=y
CONFIG_APM_DO_ENABLE=y
CONFIG_APM_CPU_IDLE=y
CONFIG_APM_DISPLAY_BLANK=y
CONFIG_APM_ALLOW_INTS=y
CONFIG_APM_REAL_MODE_POWER_OFF=y

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
CONFIG_CPU_FREQ_DEBUG=y
CONFIG_CPU_FREQ_STAT=y
CONFIG_CPU_FREQ_STAT_DETAILS=y
CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y

#
# CPUFreq processor drivers
#
CONFIG_X86_ACPI_CPUFREQ=y
CONFIG_X86_POWERNOW_K6=y
CONFIG_X86_POWERNOW_K7=y
CONFIG_X86_POWERNOW_K7_ACPI=y
CONFIG_X86_POWERNOW_K8=y
CONFIG_X86_POWERNOW_K8_ACPI=y
CONFIG_X86_GX_SUSPMOD=y
CONFIG_X86_SPEEDSTEP_CENTRINO=y
CONFIG_X86_SPEEDSTEP_CENTRINO_TABLE=y
CONFIG_X86_SPEEDSTEP_ICH=y
CONFIG_X86_SPEEDSTEP_SMI=y
CONFIG_X86_P4_CLOCKMOD=y
CONFIG_X86_CPUFREQ_NFORCE2=y
CONFIG_X86_LONGRUN=y
CONFIG_X86_LONGHAUL=y
CONFIG_X86_E_POWERSAVER=y

#
# shared options
#
CONFIG_X86_ACPI_CPUFREQ_PROC_INTF=y
CONFIG_X86_SPEEDSTEP_LIB=y
CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK=y
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y

#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GOMMCONFIG is not set
# CONFIG_PCI_GODIRECT is not set
# CONFIG_PCI_GOOLPC is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_OLPC=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCIEPORTBUS=y
CONFIG_HOTPLUG_PCI_PCIE=y
CONFIG_PCIEAER=y
CONFIG_PCIEASPM=y
CONFIG_PCIEASPM_DEBUG=y
CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y
CONFIG_PCI_LEGACY=y
CONFIG_PCI_DEBUG=y
CONFIG_HT_IRQ=y
CONFIG_ISA_DMA_API=y
CONFIG_ISA=y
CONFIG_EISA=y
CONFIG_EISA_VLB_PRIMING=y
CONFIG_EISA_PCI_EISA=y
CONFIG_EISA_VIRTUAL_ROOT=y
CONFIG_EISA_NAMES=y
CONFIG_MCA=y
CONFIG_MCA_LEGACY=y
CONFIG_MCA_PROC_FS=y
CONFIG_SCx200=y
CONFIG_SCx200HR_TIMER=y
CONFIG_OLPC=y
CONFIG_K8_NB=y
CONFIG_PCCARD=y
CONFIG_PCMCIA_DEBUG=y
CONFIG_PCMCIA=y
CONFIG_PCMCIA_LOAD_CIS=y
CONFIG_PCMCIA_IOCTL=y
CONFIG_CARDBUS=y

#
# PC-card bridges
#
CONFIG_YENTA=y
CONFIG_YENTA_O2=y
CONFIG_YENTA_RICOH=y
CONFIG_YENTA_TI=y
CONFIG_YENTA_ENE_TUNE=y
CONFIG_YENTA_TOSHIBA=y
CONFIG_PD6729=y
CONFIG_I82092=y
CONFIG_I82365=y
CONFIG_TCIC=y
CONFIG_PCMCIA_PROBE=y
CONFIG_PCCARD_NONSTATIC=y
CONFIG_HOTPLUG_PCI=y
CONFIG_HOTPLUG_PCI_FAKE=y
CONFIG_HOTPLUG_PCI_COMPAQ=y
CONFIG_HOTPLUG_PCI_COMPAQ_NVRAM=y
CONFIG_HOTPLUG_PCI_IBM=y
CONFIG_HOTPLUG_PCI_ACPI=y
CONFIG_HOTPLUG_PCI_ACPI_IBM=y
CONFIG_HOTPLUG_PCI_CPCI=y
CONFIG_HOTPLUG_PCI_CPCI_ZT5550=y
CONFIG_HOTPLUG_PCI_CPCI_GENERIC=y
CONFIG_HOTPLUG_PCI_SHPC=y

#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_AOUT=y
CONFIG_BINFMT_MISC=y
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
CONFIG_XFRM=y
CONFIG_XFRM_USER=y
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_MIGRATE=y
CONFIG_XFRM_STATISTICS=y
CONFIG_XFRM_IPCOMP=y
CONFIG_NET_KEY=y
CONFIG_NET_KEY_MIGRATE=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_ASK_IP_FIB_HASH=y
# CONFIG_IP_FIB_TRIE is not set
CONFIG_IP_FIB_HASH=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
CONFIG_NET_IPIP=y
CONFIG_NET_IPGRE=y
CONFIG_NET_IPGRE_BROADCAST=y
CONFIG_IP_MROUTE=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
CONFIG_ARPD=y
CONFIG_SYN_COOKIES=y
CONFIG_INET_AH=y
CONFIG_INET_ESP=y
CONFIG_INET_IPCOMP=y
CONFIG_INET_XFRM_TUNNEL=y
CONFIG_INET_TUNNEL=y
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
CONFIG_INET_LRO=y
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
CONFIG_TCP_CONG_ADVANCED=y
CONFIG_TCP_CONG_BIC=y
CONFIG_TCP_CONG_CUBIC=y
CONFIG_TCP_CONG_WESTWOOD=y
CONFIG_TCP_CONG_HTCP=y
CONFIG_TCP_CONG_HSTCP=y
CONFIG_TCP_CONG_HYBLA=y
CONFIG_TCP_CONG_VEGAS=y
CONFIG_TCP_CONG_SCALABLE=y
CONFIG_TCP_CONG_LP=y
CONFIG_TCP_CONG_VENO=y
CONFIG_TCP_CONG_YEAH=y
CONFIG_TCP_CONG_ILLINOIS=y
# CONFIG_DEFAULT_BIC is not set
CONFIG_DEFAULT_CUBIC=y
# CONFIG_DEFAULT_HTCP is not set
# CONFIG_DEFAULT_VEGAS is not set
# CONFIG_DEFAULT_WESTWOOD is not set
# CONFIG_DEFAULT_RENO is not set
CONFIG_DEFAULT_TCP_CONG="cubic"
CONFIG_TCP_MD5SIG=y
CONFIG_IP_VS=y
CONFIG_IP_VS_DEBUG=y
CONFIG_IP_VS_TAB_BITS=12

#
# IPVS transport protocol load balancing support
#
CONFIG_IP_VS_PROTO_TCP=y
CONFIG_IP_VS_PROTO_UDP=y
CONFIG_IP_VS_PROTO_ESP=y
CONFIG_IP_VS_PROTO_AH=y

#
# IPVS scheduler
#
CONFIG_IP_VS_RR=y
CONFIG_IP_VS_WRR=y
CONFIG_IP_VS_LC=y
CONFIG_IP_VS_WLC=y
CONFIG_IP_VS_LBLC=y
CONFIG_IP_VS_LBLCR=y
CONFIG_IP_VS_DH=y
CONFIG_IP_VS_SH=y
CONFIG_IP_VS_SED=y
CONFIG_IP_VS_NQ=y

#
# IPVS application helper
#
CONFIG_IP_VS_FTP=y
CONFIG_IPV6=y
CONFIG_IPV6_PRIVACY=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
CONFIG_IPV6_OPTIMISTIC_DAD=y
CONFIG_INET6_AH=y
CONFIG_INET6_ESP=y
CONFIG_INET6_IPCOMP=y
CONFIG_IPV6_MIP6=y
CONFIG_INET6_XFRM_TUNNEL=y
CONFIG_INET6_TUNNEL=y
CONFIG_INET6_XFRM_MODE_TRANSPORT=y
CONFIG_INET6_XFRM_MODE_TUNNEL=y
CONFIG_INET6_XFRM_MODE_BEET=y
CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION=y
CONFIG_IPV6_SIT=y
CONFIG_IPV6_NDISC_NODETYPE=y
CONFIG_IPV6_TUNNEL=y
CONFIG_IPV6_MULTIPLE_TABLES=y
CONFIG_IPV6_SUBTREES=y
CONFIG_IPV6_MROUTE=y
CONFIG_IPV6_PIMSM_V2=y
CONFIG_NETLABEL=y
CONFIG_NETWORK_SECMARK=y
CONFIG_NETFILTER=y
CONFIG_NETFILTER_DEBUG=y
CONFIG_NETFILTER_ADVANCED=y
CONFIG_BRIDGE_NETFILTER=y

#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=y
CONFIG_NETFILTER_NETLINK_QUEUE=y
CONFIG_NETFILTER_NETLINK_LOG=y
CONFIG_NF_CONNTRACK=y
CONFIG_NF_CT_ACCT=y
CONFIG_NF_CONNTRACK_MARK=y
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_EVENTS=y
CONFIG_NF_CT_PROTO_DCCP=y
CONFIG_NF_CT_PROTO_GRE=y
CONFIG_NF_CT_PROTO_SCTP=y
CONFIG_NF_CT_PROTO_UDPLITE=y
CONFIG_NF_CONNTRACK_AMANDA=y
CONFIG_NF_CONNTRACK_FTP=y
CONFIG_NF_CONNTRACK_H323=y
CONFIG_NF_CONNTRACK_IRC=y
CONFIG_NF_CONNTRACK_NETBIOS_NS=y
CONFIG_NF_CONNTRACK_PPTP=y
CONFIG_NF_CONNTRACK_SANE=y
CONFIG_NF_CONNTRACK_SIP=y
CONFIG_NF_CONNTRACK_TFTP=y
CONFIG_NF_CT_NETLINK=y
CONFIG_NETFILTER_XTABLES=y
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=y
CONFIG_NETFILTER_XT_TARGET_CONNMARK=y
CONFIG_NETFILTER_XT_TARGET_DSCP=y
CONFIG_NETFILTER_XT_TARGET_MARK=y
CONFIG_NETFILTER_XT_TARGET_NFQUEUE=y
CONFIG_NETFILTER_XT_TARGET_NFLOG=y
CONFIG_NETFILTER_XT_TARGET_NOTRACK=y
CONFIG_NETFILTER_XT_TARGET_RATEEST=y
CONFIG_NETFILTER_XT_TARGET_TRACE=y
CONFIG_NETFILTER_XT_TARGET_SECMARK=y
CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=y
CONFIG_NETFILTER_XT_TARGET_TCPMSS=y
CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=y
CONFIG_NETFILTER_XT_MATCH_COMMENT=y
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=y
CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=y
CONFIG_NETFILTER_XT_MATCH_CONNMARK=y
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=y
CONFIG_NETFILTER_XT_MATCH_DCCP=y
CONFIG_NETFILTER_XT_MATCH_DSCP=y
CONFIG_NETFILTER_XT_MATCH_ESP=y
CONFIG_NETFILTER_XT_MATCH_HELPER=y
CONFIG_NETFILTER_XT_MATCH_IPRANGE=y
CONFIG_NETFILTER_XT_MATCH_LENGTH=y
CONFIG_NETFILTER_XT_MATCH_LIMIT=y
CONFIG_NETFILTER_XT_MATCH_MAC=y
CONFIG_NETFILTER_XT_MATCH_MARK=y
CONFIG_NETFILTER_XT_MATCH_OWNER=y
CONFIG_NETFILTER_XT_MATCH_POLICY=y
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=y
CONFIG_NETFILTER_XT_MATCH_PHYSDEV=y
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=y
CONFIG_NETFILTER_XT_MATCH_QUOTA=y
CONFIG_NETFILTER_XT_MATCH_RATEEST=y
CONFIG_NETFILTER_XT_MATCH_REALM=y
CONFIG_NETFILTER_XT_MATCH_SCTP=y
CONFIG_NETFILTER_XT_MATCH_STATE=y
CONFIG_NETFILTER_XT_MATCH_STATISTIC=y
CONFIG_NETFILTER_XT_MATCH_STRING=y
CONFIG_NETFILTER_XT_MATCH_TCPMSS=y
CONFIG_NETFILTER_XT_MATCH_TIME=y
CONFIG_NETFILTER_XT_MATCH_U32=y
CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=y

#
# IP: Netfilter Configuration
#
CONFIG_NF_CONNTRACK_IPV4=y
CONFIG_NF_CONNTRACK_PROC_COMPAT=y
CONFIG_IP_NF_QUEUE=y
CONFIG_IP_NF_IPTABLES=y
CONFIG_IP_NF_MATCH_RECENT=y
CONFIG_IP_NF_MATCH_ECN=y
CONFIG_IP_NF_MATCH_AH=y
CONFIG_IP_NF_MATCH_TTL=y
CONFIG_IP_NF_MATCH_ADDRTYPE=y
CONFIG_IP_NF_FILTER=y
CONFIG_IP_NF_TARGET_REJECT=y
CONFIG_IP_NF_TARGET_LOG=y
CONFIG_IP_NF_TARGET_ULOG=y
CONFIG_NF_NAT=y
CONFIG_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=y
CONFIG_IP_NF_TARGET_REDIRECT=y
CONFIG_IP_NF_TARGET_NETMAP=y
CONFIG_NF_NAT_SNMP_BASIC=y
CONFIG_NF_NAT_PROTO_DCCP=y
CONFIG_NF_NAT_PROTO_GRE=y
CONFIG_NF_NAT_PROTO_UDPLITE=y
CONFIG_NF_NAT_PROTO_SCTP=y
CONFIG_NF_NAT_FTP=y
CONFIG_NF_NAT_IRC=y
CONFIG_NF_NAT_TFTP=y
CONFIG_NF_NAT_AMANDA=y
CONFIG_NF_NAT_PPTP=y
CONFIG_NF_NAT_H323=y
CONFIG_NF_NAT_SIP=y
CONFIG_IP_NF_MANGLE=y
CONFIG_IP_NF_TARGET_ECN=y
CONFIG_IP_NF_TARGET_TTL=y
CONFIG_IP_NF_TARGET_CLUSTERIP=y
CONFIG_IP_NF_RAW=y
CONFIG_IP_NF_SECURITY=y
CONFIG_IP_NF_ARPTABLES=y
CONFIG_IP_NF_ARPFILTER=y
CONFIG_IP_NF_ARP_MANGLE=y

#
# IPv6: Netfilter Configuration
#
CONFIG_NF_CONNTRACK_IPV6=y
CONFIG_IP6_NF_QUEUE=y
CONFIG_IP6_NF_IPTABLES=y
CONFIG_IP6_NF_MATCH_RT=y
CONFIG_IP6_NF_MATCH_OPTS=y
CONFIG_IP6_NF_MATCH_FRAG=y
CONFIG_IP6_NF_MATCH_HL=y
CONFIG_IP6_NF_MATCH_IPV6HEADER=y
CONFIG_IP6_NF_MATCH_AH=y
CONFIG_IP6_NF_MATCH_MH=y
CONFIG_IP6_NF_MATCH_EUI64=y
CONFIG_IP6_NF_FILTER=y
CONFIG_IP6_NF_TARGET_LOG=y
CONFIG_IP6_NF_TARGET_REJECT=y
CONFIG_IP6_NF_MANGLE=y
CONFIG_IP6_NF_TARGET_HL=y
CONFIG_IP6_NF_RAW=y
CONFIG_IP6_NF_SECURITY=y

#
# DECnet: Netfilter Configuration
#
CONFIG_DECNET_NF_GRABULATOR=y

#
# Bridge: Netfilter Configuration
#
CONFIG_BRIDGE_NF_EBTABLES=y
CONFIG_BRIDGE_EBT_BROUTE=y
CONFIG_BRIDGE_EBT_T_FILTER=y
CONFIG_BRIDGE_EBT_T_NAT=y
CONFIG_BRIDGE_EBT_802_3=y
CONFIG_BRIDGE_EBT_AMONG=y
CONFIG_BRIDGE_EBT_ARP=y
CONFIG_BRIDGE_EBT_IP=y
CONFIG_BRIDGE_EBT_IP6=y
CONFIG_BRIDGE_EBT_LIMIT=y
CONFIG_BRIDGE_EBT_MARK=y
CONFIG_BRIDGE_EBT_PKTTYPE=y
CONFIG_BRIDGE_EBT_STP=y
CONFIG_BRIDGE_EBT_VLAN=y
CONFIG_BRIDGE_EBT_ARPREPLY=y
CONFIG_BRIDGE_EBT_DNAT=y
CONFIG_BRIDGE_EBT_MARK_T=y
CONFIG_BRIDGE_EBT_REDIRECT=y
CONFIG_BRIDGE_EBT_SNAT=y
CONFIG_BRIDGE_EBT_LOG=y
CONFIG_BRIDGE_EBT_ULOG=y
CONFIG_BRIDGE_EBT_NFLOG=y
CONFIG_IP_DCCP=y
CONFIG_INET_DCCP_DIAG=y
CONFIG_IP_DCCP_ACKVEC=y

#
# DCCP CCIDs Configuration (EXPERIMENTAL)
#
CONFIG_IP_DCCP_CCID2=y
CONFIG_IP_DCCP_CCID2_DEBUG=y
CONFIG_IP_DCCP_CCID3=y
CONFIG_IP_DCCP_CCID3_DEBUG=y
CONFIG_IP_DCCP_CCID3_RTO=100
CONFIG_IP_DCCP_TFRC_LIB=y
CONFIG_IP_DCCP_TFRC_DEBUG=y

#
# DCCP Kernel Hacking
#
CONFIG_IP_DCCP_DEBUG=y
CONFIG_NET_DCCPPROBE=y
CONFIG_IP_SCTP=y
CONFIG_SCTP_DBG_MSG=y
CONFIG_SCTP_DBG_OBJCNT=y
# CONFIG_SCTP_HMAC_NONE is not set
# CONFIG_SCTP_HMAC_SHA1 is not set
CONFIG_SCTP_HMAC_MD5=y
CONFIG_TIPC=y
CONFIG_TIPC_ADVANCED=y
CONFIG_TIPC_ZONES=3
CONFIG_TIPC_CLUSTERS=1
CONFIG_TIPC_NODES=255
CONFIG_TIPC_SLAVE_NODES=0
CONFIG_TIPC_PORTS=8191
CONFIG_TIPC_LOG=0
CONFIG_TIPC_DEBUG=y
CONFIG_ATM=y
CONFIG_ATM_CLIP=y
CONFIG_ATM_CLIP_NO_ICMP=y
CONFIG_ATM_LANE=y
CONFIG_ATM_MPOA=y
CONFIG_ATM_BR2684=y
CONFIG_ATM_BR2684_IPFILTER=y
CONFIG_STP=y
CONFIG_GARP=y
CONFIG_BRIDGE=y
CONFIG_VLAN_8021Q=y
CONFIG_VLAN_8021Q_GVRP=y
CONFIG_DECNET=y
CONFIG_DECNET_ROUTER=y
CONFIG_LLC=y
CONFIG_LLC2=y
CONFIG_IPX=y
CONFIG_IPX_INTERN=y
CONFIG_ATALK=y
CONFIG_DEV_APPLETALK=y
CONFIG_LTPC=y
CONFIG_IPDDP=y
CONFIG_IPDDP_ENCAP=y
CONFIG_IPDDP_DECAP=y
CONFIG_X25=y
CONFIG_LAPB=y
CONFIG_ECONET=y
CONFIG_ECONET_AUNUDP=y
CONFIG_ECONET_NATIVE=y
CONFIG_WAN_ROUTER=y
CONFIG_NET_SCHED=y

#
# Queueing/Scheduling
#
CONFIG_NET_SCH_CBQ=y
CONFIG_NET_SCH_HTB=y
CONFIG_NET_SCH_HFSC=y
CONFIG_NET_SCH_ATM=y
CONFIG_NET_SCH_PRIO=y
CONFIG_NET_SCH_RED=y
CONFIG_NET_SCH_SFQ=y
CONFIG_NET_SCH_TEQL=y
CONFIG_NET_SCH_TBF=y
CONFIG_NET_SCH_GRED=y
CONFIG_NET_SCH_DSMARK=y
CONFIG_NET_SCH_NETEM=y
CONFIG_NET_SCH_INGRESS=y

#
# Classification
#
CONFIG_NET_CLS=y
CONFIG_NET_CLS_BASIC=y
CONFIG_NET_CLS_TCINDEX=y
CONFIG_NET_CLS_ROUTE4=y
CONFIG_NET_CLS_ROUTE=y
CONFIG_NET_CLS_FW=y
CONFIG_NET_CLS_U32=y
CONFIG_CLS_U32_PERF=y
CONFIG_CLS_U32_MARK=y
CONFIG_NET_CLS_RSVP=y
CONFIG_NET_CLS_RSVP6=y
CONFIG_NET_CLS_FLOW=y
CONFIG_NET_EMATCH=y
CONFIG_NET_EMATCH_STACK=32
CONFIG_NET_EMATCH_CMP=y
CONFIG_NET_EMATCH_NBYTE=y
CONFIG_NET_EMATCH_U32=y
CONFIG_NET_EMATCH_META=y
CONFIG_NET_EMATCH_TEXT=y
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y
CONFIG_NET_ACT_GACT=y
CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=y
CONFIG_NET_ACT_IPT=y
CONFIG_NET_ACT_NAT=y
CONFIG_NET_ACT_PEDIT=y
CONFIG_NET_ACT_SIMP=y
CONFIG_NET_CLS_IND=y
CONFIG_NET_SCH_FIFO=y

#
# Network testing
#
CONFIG_NET_PKTGEN=y
CONFIG_NET_TCPPROBE=y
CONFIG_HAMRADIO=y

#
# Packet Radio protocols
#
CONFIG_AX25=y
CONFIG_AX25_DAMA_SLAVE=y
CONFIG_NETROM=y
CONFIG_ROSE=y

#
# AX.25 network device drivers
#
CONFIG_MKISS=y
CONFIG_6PACK=y
CONFIG_BPQETHER=y
CONFIG_SCC=y
CONFIG_SCC_DELAY=y
CONFIG_SCC_TRXECHO=y
CONFIG_BAYCOM_SER_FDX=y
CONFIG_BAYCOM_SER_HDX=y
CONFIG_BAYCOM_PAR=y
CONFIG_BAYCOM_EPP=y
CONFIG_YAM=y
CONFIG_CAN=y
CONFIG_CAN_RAW=y
CONFIG_CAN_BCM=y

#
# CAN Device Drivers
#
CONFIG_CAN_VCAN=y
CONFIG_CAN_DEBUG_DEVICES=y
CONFIG_IRDA=y

#
# IrDA protocols
#
CONFIG_IRLAN=y
CONFIG_IRNET=y
CONFIG_IRCOMM=y
CONFIG_IRDA_ULTRA=y

#
# IrDA options
#
CONFIG_IRDA_CACHE_LAST_LSAP=y
CONFIG_IRDA_FAST_RR=y
CONFIG_IRDA_DEBUG=y

#
# Infrared-port device drivers
#

#
# SIR device drivers
#
CONFIG_IRTTY_SIR=y

#
# Dongle support
#
CONFIG_DONGLE=y
CONFIG_ESI_DONGLE=y
CONFIG_ACTISYS_DONGLE=y
CONFIG_TEKRAM_DONGLE=y
CONFIG_TOIM3232_DONGLE=y
CONFIG_LITELINK_DONGLE=y
CONFIG_MA600_DONGLE=y
CONFIG_GIRBIL_DONGLE=y
CONFIG_MCP2120_DONGLE=y
CONFIG_OLD_BELKIN_DONGLE=y
CONFIG_ACT200L_DONGLE=y
CONFIG_KINGSUN_DONGLE=y
CONFIG_KSDAZZLE_DONGLE=y
CONFIG_KS959_DONGLE=y

#
# FIR device drivers
#
CONFIG_USB_IRDA=y
CONFIG_SIGMATEL_FIR=y
CONFIG_NSC_FIR=y
CONFIG_WINBOND_FIR=y
CONFIG_TOSHIBA_FIR=y
CONFIG_SMC_IRCC_FIR=y
CONFIG_ALI_FIR=y
CONFIG_VLSI_FIR=y
CONFIG_VIA_FIR=y
CONFIG_MCS_FIR=y
CONFIG_BT=y
CONFIG_BT_L2CAP=y
CONFIG_BT_SCO=y
CONFIG_BT_RFCOMM=y
CONFIG_BT_RFCOMM_TTY=y
CONFIG_BT_BNEP=y
CONFIG_BT_BNEP_MC_FILTER=y
CONFIG_BT_BNEP_PROTO_FILTER=y
CONFIG_BT_CMTP=y
CONFIG_BT_HIDP=y

#
# Bluetooth device drivers
#
CONFIG_BT_HCIBTUSB=y
CONFIG_BT_HCIBTSDIO=y
CONFIG_BT_HCIUART=y
CONFIG_BT_HCIUART_H4=y
CONFIG_BT_HCIUART_BCSP=y
CONFIG_BT_HCIUART_LL=y
CONFIG_BT_HCIBCM203X=y
CONFIG_BT_HCIBPA10X=y
CONFIG_BT_HCIBFUSB=y
CONFIG_BT_HCIDTL1=y
CONFIG_BT_HCIBT3C=y
CONFIG_BT_HCIBLUECARD=y
CONFIG_BT_HCIBTUART=y
CONFIG_BT_HCIVHCI=y
CONFIG_AF_RXRPC=y
CONFIG_AF_RXRPC_DEBUG=y
CONFIG_RXKAD=y
CONFIG_FIB_RULES=y

#
# Wireless
#
CONFIG_CFG80211=y
CONFIG_NL80211=y
CONFIG_WIRELESS_EXT=y
CONFIG_WIRELESS_EXT_SYSFS=y
CONFIG_MAC80211=y

#
# Rate control algorithm selection
#
CONFIG_MAC80211_RC_PID=y
CONFIG_MAC80211_RC_DEFAULT_PID=y
CONFIG_MAC80211_RC_DEFAULT="pid"
CONFIG_MAC80211_MESH=y
CONFIG_MAC80211_LEDS=y
CONFIG_MAC80211_DEBUGFS=y
CONFIG_MAC80211_DEBUG_MENU=y
CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT=y
CONFIG_MAC80211_NOINLINE=y
CONFIG_MAC80211_VERBOSE_DEBUG=y
CONFIG_MAC80211_HT_DEBUG=y
CONFIG_MAC80211_TKIP_DEBUG=y
CONFIG_MAC80211_IBSS_DEBUG=y
CONFIG_MAC80211_VERBOSE_PS_DEBUG=y
CONFIG_MAC80211_VERBOSE_MPL_DEBUG=y
CONFIG_MAC80211_LOWTX_FRAME_DUMP=y
CONFIG_MAC80211_DEBUG_COUNTERS=y
CONFIG_MAC80211_VERBOSE_SPECT_MGMT_DEBUG=y
CONFIG_IEEE80211=y
CONFIG_IEEE80211_DEBUG=y
CONFIG_IEEE80211_CRYPT_WEP=y
CONFIG_IEEE80211_CRYPT_CCMP=y
CONFIG_IEEE80211_CRYPT_TKIP=y
CONFIG_RFKILL=y
CONFIG_RFKILL_INPUT=y
CONFIG_RFKILL_LEDS=y
CONFIG_NET_9P=y
CONFIG_NET_9P_VIRTIO=y
CONFIG_NET_9P_DEBUG=y

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
CONFIG_DEBUG_DRIVER=y
CONFIG_DEBUG_DEVRES=y
# CONFIG_SYS_HYPERVISOR is not set
CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
CONFIG_PARPORT=y
CONFIG_PARPORT_PC=y
CONFIG_PARPORT_SERIAL=y
CONFIG_PARPORT_PC_FIFO=y
CONFIG_PARPORT_PC_SUPERIO=y
CONFIG_PARPORT_PC_PCMCIA=y
# CONFIG_PARPORT_GSC is not set
CONFIG_PARPORT_AX88796=y
CONFIG_PARPORT_1284=y
CONFIG_PARPORT_NOT_PC=y
CONFIG_PNP=y
CONFIG_PNP_DEBUG=y

#
# Protocols
#
CONFIG_ISAPNP=y
CONFIG_PNPBIOS=y
CONFIG_PNPBIOS_PROC_FS=y
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
CONFIG_BLK_DEV_FD=y
CONFIG_BLK_DEV_XD=y
CONFIG_BLK_CPQ_DA=y
CONFIG_BLK_CPQ_CISS_DA=y
CONFIG_CISS_SCSI_TAPE=y
CONFIG_BLK_DEV_DAC960=y
CONFIG_BLK_DEV_UMEM=y
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_CRYPTOLOOP=y
CONFIG_BLK_DEV_NBD=y
CONFIG_BLK_DEV_SX8=y
CONFIG_BLK_DEV_UB=y
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096
CONFIG_BLK_DEV_XIP=y
CONFIG_CDROM_PKTCDVD=y
CONFIG_CDROM_PKTCDVD_BUFFERS=8
CONFIG_CDROM_PKTCDVD_WCACHE=y
CONFIG_ATA_OVER_ETH=y
CONFIG_VIRTIO_BLK=y
CONFIG_BLK_DEV_HD=y
CONFIG_MISC_DEVICES=y
CONFIG_IBM_ASM=y
CONFIG_PHANTOM=y
CONFIG_EEPROM_93CX6=y
CONFIG_SGI_IOC4=y
CONFIG_TIFM_CORE=y
CONFIG_TIFM_7XX1=y
CONFIG_ACER_WMI=y
CONFIG_FUJITSU_LAPTOP=y
CONFIG_FUJITSU_LAPTOP_DEBUG=y
CONFIG_TC1100_WMI=y
CONFIG_HP_WMI=y
CONFIG_MSI_LAPTOP=y
CONFIG_COMPAL_LAPTOP=y
CONFIG_SONY_LAPTOP=y
CONFIG_SONYPI_COMPAT=y
CONFIG_THINKPAD_ACPI=y
CONFIG_THINKPAD_ACPI_DEBUG=y
CONFIG_THINKPAD_ACPI_BAY=y
CONFIG_THINKPAD_ACPI_VIDEO=y
CONFIG_THINKPAD_ACPI_HOTKEY_POLL=y
CONFIG_INTEL_MENLOW=y
CONFIG_EEEPC_LAPTOP=y
CONFIG_ENCLOSURE_SERVICES=y
CONFIG_HP_ILO=y
CONFIG_HAVE_IDE=y

#
# SCSI device support
#
CONFIG_RAID_ATTRS=y
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_TGT=y
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=y
CONFIG_CHR_DEV_OSST=y
CONFIG_BLK_DEV_SR=y
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_CHR_DEV_SG=y
CONFIG_CHR_DEV_SCH=y
CONFIG_SCSI_ENCLOSURE=y

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=y
CONFIG_SCSI_FC_ATTRS=y
CONFIG_SCSI_FC_TGT_ATTRS=y
CONFIG_SCSI_ISCSI_ATTRS=y
CONFIG_SCSI_SAS_ATTRS=y
CONFIG_SCSI_SRP_ATTRS=y
CONFIG_SCSI_SRP_TGT_ATTRS=y
CONFIG_SCSI_LOWLEVEL=y
CONFIG_ISCSI_TCP=y
CONFIG_BLK_DEV_3W_XXXX_RAID=y
CONFIG_SCSI_3W_9XXX=y
CONFIG_SCSI_7000FASST=y
CONFIG_SCSI_ACARD=y
CONFIG_SCSI_AHA152X=y
CONFIG_SCSI_AHA1542=y
CONFIG_SCSI_AHA1740=y
CONFIG_SCSI_AACRAID=y
CONFIG_SCSI_AIC7XXX=y
CONFIG_AIC7XXX_CMDS_PER_DEVICE=32
CONFIG_AIC7XXX_RESET_DELAY_MS=5000
CONFIG_AIC7XXX_DEBUG_ENABLE=y
CONFIG_AIC7XXX_DEBUG_MASK=0
CONFIG_AIC7XXX_REG_PRETTY_PRINT=y
CONFIG_SCSI_AIC7XXX_OLD=y
CONFIG_SCSI_AIC79XX=y
CONFIG_AIC79XX_CMDS_PER_DEVICE=32
CONFIG_AIC79XX_RESET_DELAY_MS=5000
CONFIG_AIC79XX_DEBUG_ENABLE=y
CONFIG_AIC79XX_DEBUG_MASK=0
CONFIG_AIC79XX_REG_PRETTY_PRINT=y
CONFIG_SCSI_DPT_I2O=y
CONFIG_SCSI_ADVANSYS=y
CONFIG_SCSI_IN2000=y
CONFIG_SCSI_ARCMSR=y
CONFIG_SCSI_ARCMSR_AER=y
CONFIG_MEGARAID_NEWGEN=y
CONFIG_MEGARAID_MM=y
CONFIG_MEGARAID_MAILBOX=y
CONFIG_MEGARAID_LEGACY=y
CONFIG_MEGARAID_SAS=y
CONFIG_SCSI_HPTIOP=y
CONFIG_SCSI_BUSLOGIC=y
CONFIG_SCSI_FLASHPOINT=y
CONFIG_SCSI_DMX3191D=y
CONFIG_SCSI_DTC3280=y
CONFIG_SCSI_EATA=y
CONFIG_SCSI_EATA_TAGGED_QUEUE=y
CONFIG_SCSI_EATA_LINKED_COMMANDS=y
CONFIG_SCSI_EATA_MAX_TAGS=16
CONFIG_SCSI_FUTURE_DOMAIN=y
CONFIG_SCSI_FD_MCS=y
CONFIG_SCSI_GDTH=y
CONFIG_SCSI_GENERIC_NCR5380=y
CONFIG_SCSI_GENERIC_NCR5380_MMIO=y
CONFIG_SCSI_GENERIC_NCR53C400=y
CONFIG_SCSI_IBMMCA=y
CONFIG_IBMMCA_SCSI_ORDER_STANDARD=y
CONFIG_IBMMCA_SCSI_DEV_RESET=y
CONFIG_SCSI_IPS=y
CONFIG_SCSI_INITIO=y
CONFIG_SCSI_INIA100=y
CONFIG_SCSI_PPA=y
CONFIG_SCSI_IMM=y
CONFIG_SCSI_IZIP_EPP16=y
CONFIG_SCSI_IZIP_SLOW_CTR=y
CONFIG_SCSI_NCR53C406A=y
CONFIG_SCSI_NCR_D700=y
CONFIG_SCSI_STEX=y
CONFIG_SCSI_SYM53C8XX_2=y
CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=1
CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS=16
CONFIG_SCSI_SYM53C8XX_MAX_TAGS=64
CONFIG_SCSI_SYM53C8XX_MMIO=y
CONFIG_SCSI_IPR=y
CONFIG_SCSI_IPR_TRACE=y
CONFIG_SCSI_IPR_DUMP=y
CONFIG_SCSI_NCR_Q720=y
CONFIG_SCSI_NCR53C8XX_DEFAULT_TAGS=8
CONFIG_SCSI_NCR53C8XX_MAX_TAGS=32
CONFIG_SCSI_NCR53C8XX_SYNC=20
CONFIG_SCSI_PAS16=y
CONFIG_SCSI_QLOGIC_FAS=y
CONFIG_SCSI_QLOGIC_1280=y
CONFIG_SCSI_QLA_FC=y
CONFIG_SCSI_QLA_ISCSI=y
CONFIG_SCSI_LPFC=y
CONFIG_SCSI_SIM710=y
CONFIG_SCSI_SYM53C416=y
CONFIG_SCSI_DC395x=y
CONFIG_SCSI_DC390T=y
CONFIG_SCSI_T128=y
CONFIG_SCSI_U14_34F=y
CONFIG_SCSI_U14_34F_TAGGED_QUEUE=y
CONFIG_SCSI_U14_34F_LINKED_COMMANDS=y
CONFIG_SCSI_U14_34F_MAX_TAGS=8
CONFIG_SCSI_ULTRASTOR=y
CONFIG_SCSI_NSP32=y
CONFIG_SCSI_SRP=y
CONFIG_SCSI_LOWLEVEL_PCMCIA=y
CONFIG_PCMCIA_AHA152X=m
CONFIG_PCMCIA_FDOMAIN=m
CONFIG_PCMCIA_NINJA_SCSI=m
CONFIG_PCMCIA_QLOGIC=m
CONFIG_PCMCIA_SYM53C500=m
CONFIG_SCSI_DH=y
CONFIG_SCSI_DH_RDAC=y
CONFIG_SCSI_DH_HP_SW=y
CONFIG_SCSI_DH_EMC=y
CONFIG_SCSI_DH_ALUA=y
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_ACPI=y
CONFIG_SATA_PMP=y
CONFIG_SATA_AHCI=y
CONFIG_SATA_SIL24=y
CONFIG_ATA_SFF=y
CONFIG_SATA_SVW=y
CONFIG_ATA_PIIX=y
CONFIG_SATA_MV=y
CONFIG_SATA_NV=y
CONFIG_PDC_ADMA=y
CONFIG_SATA_QSTOR=y
CONFIG_SATA_PROMISE=y
CONFIG_SATA_SX4=y
CONFIG_SATA_SIL=y
CONFIG_SATA_SIS=y
CONFIG_SATA_ULI=y
CONFIG_SATA_VIA=y
CONFIG_SATA_VITESSE=y
CONFIG_SATA_INIC162X=y
CONFIG_PATA_ACPI=y
CONFIG_PATA_ALI=y
CONFIG_PATA_AMD=y
CONFIG_PATA_ARTOP=y
CONFIG_PATA_ATIIXP=y
CONFIG_PATA_CMD640_PCI=y
CONFIG_PATA_CMD64X=y
CONFIG_PATA_CS5520=y
CONFIG_PATA_CS5530=y
CONFIG_PATA_CS5535=y
CONFIG_PATA_CS5536=y
CONFIG_PATA_CYPRESS=y
CONFIG_PATA_EFAR=y
CONFIG_ATA_GENERIC=y
CONFIG_PATA_HPT366=y
CONFIG_PATA_HPT37X=y
CONFIG_PATA_HPT3X2N=y
CONFIG_PATA_HPT3X3=y
CONFIG_PATA_HPT3X3_DMA=y
CONFIG_PATA_ISAPNP=y
CONFIG_PATA_IT821X=y
CONFIG_PATA_IT8213=y
CONFIG_PATA_JMICRON=y
CONFIG_PATA_LEGACY=y
CONFIG_PATA_TRIFLEX=y
CONFIG_PATA_MARVELL=y
CONFIG_PATA_MPIIX=y
CONFIG_PATA_OLDPIIX=y
CONFIG_PATA_NETCELL=y
CONFIG_PATA_NINJA32=y
CONFIG_PATA_NS87410=y
CONFIG_PATA_NS87415=y
CONFIG_PATA_OPTI=y
CONFIG_PATA_OPTIDMA=y
CONFIG_PATA_PCMCIA=y
CONFIG_PATA_PDC_OLD=y
CONFIG_PATA_QDI=y
CONFIG_PATA_RADISYS=y
CONFIG_PATA_RZ1000=y
CONFIG_PATA_SC1200=y
CONFIG_PATA_SERVERWORKS=y
CONFIG_PATA_PDC2027X=y
CONFIG_PATA_SIL680=y
CONFIG_PATA_SIS=y
CONFIG_PATA_VIA=y
CONFIG_PATA_WINBOND=y
CONFIG_PATA_WINBOND_VLB=y
CONFIG_PATA_PLATFORM=y
CONFIG_PATA_SCH=y
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_AUTODETECT=y
CONFIG_MD_LINEAR=y
CONFIG_MD_RAID0=y
CONFIG_MD_RAID1=y
CONFIG_MD_RAID10=y
CONFIG_MD_RAID456=y
CONFIG_MD_RAID5_RESHAPE=y
CONFIG_MD_MULTIPATH=y
CONFIG_MD_FAULTY=y
CONFIG_BLK_DEV_DM=y
CONFIG_DM_DEBUG=y
CONFIG_DM_CRYPT=y
CONFIG_DM_SNAPSHOT=y
CONFIG_DM_MIRROR=y
CONFIG_DM_ZERO=y
CONFIG_DM_MULTIPATH=y
CONFIG_DM_DELAY=y
CONFIG_DM_UEVENT=y
CONFIG_FUSION=y
CONFIG_FUSION_SPI=y
CONFIG_FUSION_FC=y
CONFIG_FUSION_SAS=y
CONFIG_FUSION_MAX_SGE=128
CONFIG_FUSION_CTL=y
CONFIG_FUSION_LAN=y
CONFIG_FUSION_LOGGING=y

#
# IEEE 1394 (FireWire) support
#

#
# Enable only one of the two stacks, unless you know what you are doing
#
CONFIG_FIREWIRE=y
CONFIG_FIREWIRE_OHCI=y
CONFIG_FIREWIRE_OHCI_DEBUG=y
CONFIG_FIREWIRE_SBP2=y
CONFIG_IEEE1394=y
CONFIG_IEEE1394_OHCI1394=y
CONFIG_IEEE1394_PCILYNX=y
CONFIG_IEEE1394_SBP2=y
CONFIG_IEEE1394_SBP2_PHYS_DMA=y
CONFIG_IEEE1394_ETH1394_ROM_ENTRY=y
CONFIG_IEEE1394_ETH1394=y
CONFIG_IEEE1394_RAWIO=y
CONFIG_IEEE1394_VIDEO1394=y
CONFIG_IEEE1394_DV1394=y
CONFIG_IEEE1394_VERBOSEDEBUG=y
CONFIG_I2O=y
CONFIG_I2O_LCT_NOTIFY_ON_CHANGES=y
CONFIG_I2O_EXT_ADAPTEC=y
CONFIG_I2O_CONFIG=y
CONFIG_I2O_CONFIG_OLD_IOCTL=y
CONFIG_I2O_BUS=y
CONFIG_I2O_BLOCK=y
CONFIG_I2O_SCSI=y
CONFIG_I2O_PROC=y
CONFIG_MACINTOSH_DRIVERS=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_NETDEVICES=y
CONFIG_IFB=y
CONFIG_DUMMY=y
CONFIG_BONDING=y
CONFIG_MACVLAN=y
CONFIG_EQUALIZER=y
CONFIG_TUN=y
CONFIG_VETH=y
CONFIG_NET_SB1000=y
CONFIG_ARCNET=y
CONFIG_ARCNET_1201=y
CONFIG_ARCNET_1051=y
CONFIG_ARCNET_RAW=y
CONFIG_ARCNET_CAP=y
CONFIG_ARCNET_COM90xx=y
CONFIG_ARCNET_COM90xxIO=y
CONFIG_ARCNET_RIM_I=y
CONFIG_ARCNET_COM20020=y
CONFIG_ARCNET_COM20020_ISA=y
CONFIG_ARCNET_COM20020_PCI=y
CONFIG_PHYLIB=y

#
# MII PHY device drivers
#
CONFIG_MARVELL_PHY=y
CONFIG_DAVICOM_PHY=y
CONFIG_QSEMI_PHY=y
CONFIG_LXT_PHY=y
CONFIG_CICADA_PHY=y
CONFIG_VITESSE_PHY=y
CONFIG_SMSC_PHY=y
CONFIG_BROADCOM_PHY=y
CONFIG_ICPLUS_PHY=y
CONFIG_REALTEK_PHY=y
CONFIG_FIXED_PHY=y
CONFIG_MDIO_BITBANG=y
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
CONFIG_HAPPYMEAL=y
CONFIG_SUNGEM=y
CONFIG_CASSINI=y
CONFIG_NET_VENDOR_3COM=y
CONFIG_EL1=y
CONFIG_EL2=y
CONFIG_ELPLUS=y
CONFIG_EL16=y
CONFIG_EL3=y
CONFIG_3C515=y
CONFIG_ELMC=y
CONFIG_ELMC_II=y
CONFIG_VORTEX=y
CONFIG_TYPHOON=y
CONFIG_LANCE=y
CONFIG_NET_VENDOR_SMC=y
CONFIG_ULTRAMCA=y
CONFIG_ULTRA=y
CONFIG_ULTRA32=y
CONFIG_SMC9194=y
CONFIG_ENC28J60=y
CONFIG_ENC28J60_WRITEVERIFY=y
CONFIG_NET_VENDOR_RACAL=y
CONFIG_NI52=y
CONFIG_NI65=y
CONFIG_NET_TULIP=y
CONFIG_DE2104X=y
CONFIG_TULIP=y
CONFIG_TULIP_MWI=y
CONFIG_TULIP_MMIO=y
CONFIG_TULIP_NAPI=y
CONFIG_TULIP_NAPI_HW_MITIGATION=y
CONFIG_DE4X5=y
CONFIG_WINBOND_840=y
CONFIG_DM9102=y
CONFIG_ULI526X=y
CONFIG_PCMCIA_XIRCOM=y
CONFIG_AT1700=y
CONFIG_DEPCA=y
CONFIG_HP100=y
CONFIG_NET_ISA=y
CONFIG_E2100=y
CONFIG_EWRK3=y
CONFIG_EEXPRESS=y
CONFIG_EEXPRESS_PRO=y
CONFIG_HPLAN=y
CONFIG_LP486E=y
CONFIG_ETH16I=y
CONFIG_NE2000=y
CONFIG_ZNET=y
CONFIG_SEEQ8005=y
CONFIG_NE2_MCA=y
CONFIG_IBMLANA=y
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
CONFIG_NET_PCI=y
CONFIG_PCNET32=y
CONFIG_AMD8111_ETH=y
CONFIG_ADAPTEC_STARFIRE=y
CONFIG_AC3200=y
CONFIG_APRICOT=y
CONFIG_B44=y
CONFIG_B44_PCI_AUTOSELECT=y
CONFIG_B44_PCICORE_AUTOSELECT=y
CONFIG_B44_PCI=y
CONFIG_FORCEDETH=y
CONFIG_FORCEDETH_NAPI=y
CONFIG_CS89x0=y
CONFIG_EEPRO100=y
CONFIG_E100=y
CONFIG_LNE390=y
CONFIG_FEALNX=y
CONFIG_NATSEMI=y
CONFIG_NE2K_PCI=y
CONFIG_NE3210=y
CONFIG_ES3210=y
CONFIG_8139CP=y
CONFIG_8139TOO=y
CONFIG_8139TOO_PIO=y
CONFIG_8139TOO_TUNE_TWISTER=y
CONFIG_8139TOO_8129=y
CONFIG_8139_OLD_RX_RESET=y
CONFIG_R6040=y
CONFIG_SIS900=y
CONFIG_EPIC100=y
CONFIG_SUNDANCE=y
CONFIG_SUNDANCE_MMIO=y
CONFIG_TLAN=y
CONFIG_VIA_RHINE=y
CONFIG_VIA_RHINE_MMIO=y
CONFIG_SC92031=y
CONFIG_NET_POCKET=y
CONFIG_ATP=y
CONFIG_DE600=y
CONFIG_DE620=y
CONFIG_NETDEV_1000=y
CONFIG_ACENIC=y
CONFIG_ACENIC_OMIT_TIGON_I=y
CONFIG_DL2K=y
CONFIG_E1000=y
CONFIG_E1000_DISABLE_PACKET_SPLIT=y
CONFIG_E1000E=y
CONFIG_IP1000=y
CONFIG_IGB=y
CONFIG_IGB_LRO=y
CONFIG_NS83820=y
CONFIG_HAMACHI=y
CONFIG_YELLOWFIN=y
CONFIG_R8169=y
CONFIG_R8169_VLAN=y
CONFIG_SIS190=y
CONFIG_SKGE=y
CONFIG_SKGE_DEBUG=y
CONFIG_SKY2=y
CONFIG_SKY2_DEBUG=y
CONFIG_VIA_VELOCITY=y
CONFIG_TIGON3=y
CONFIG_BNX2=y
CONFIG_QLA3XXX=y
CONFIG_ATL1=y
CONFIG_ATL1E=y
CONFIG_NETDEV_10000=y
CONFIG_CHELSIO_T1=y
CONFIG_CHELSIO_T1_1G=y
CONFIG_CHELSIO_T3=y
CONFIG_IXGBE=y
CONFIG_IXGB=y
CONFIG_S2IO=y
CONFIG_MYRI10GE=y
CONFIG_NETXEN_NIC=y
CONFIG_NIU=y
CONFIG_MLX4_CORE=y
CONFIG_MLX4_DEBUG=y
CONFIG_TEHUTI=y
CONFIG_BNX2X=y
CONFIG_SFC=y
CONFIG_TR=y
CONFIG_IBMTR=y
CONFIG_IBMOL=y
CONFIG_IBMLS=y
CONFIG_3C359=y
CONFIG_TMS380TR=y
CONFIG_TMSPCI=y
CONFIG_SKISA=y
CONFIG_PROTEON=y
CONFIG_ABYSS=y
CONFIG_MADGEMC=y
CONFIG_SMCTR=y

#
# Wireless LAN
#
CONFIG_WLAN_PRE80211=y
CONFIG_STRIP=y
CONFIG_ARLAN=y
CONFIG_WAVELAN=y
CONFIG_PCMCIA_WAVELAN=y
CONFIG_PCMCIA_NETWAVE=y
CONFIG_WLAN_80211=y
CONFIG_PCMCIA_RAYCS=y
CONFIG_IPW2100=y
CONFIG_IPW2100_MONITOR=y
CONFIG_IPW2100_DEBUG=y
CONFIG_IPW2200=y
CONFIG_IPW2200_MONITOR=y
CONFIG_IPW2200_RADIOTAP=y
CONFIG_IPW2200_PROMISCUOUS=y
CONFIG_IPW2200_QOS=y
CONFIG_IPW2200_DEBUG=y
CONFIG_LIBERTAS=y
CONFIG_LIBERTAS_USB=y
CONFIG_LIBERTAS_CS=y
CONFIG_LIBERTAS_SDIO=y
CONFIG_LIBERTAS_DEBUG=y
CONFIG_AIRO=y
CONFIG_HERMES=y
CONFIG_PLX_HERMES=y
CONFIG_TMD_HERMES=y
CONFIG_NORTEL_HERMES=y
CONFIG_PCI_HERMES=y
CONFIG_PCMCIA_HERMES=y
CONFIG_PCMCIA_SPECTRUM=y
CONFIG_ATMEL=y
CONFIG_PCI_ATMEL=y
CONFIG_PCMCIA_ATMEL=y
CONFIG_AIRO_CS=y
CONFIG_PCMCIA_WL3501=y
CONFIG_PRISM54=y
CONFIG_USB_ZD1201=y
CONFIG_USB_NET_RNDIS_WLAN=y
CONFIG_RTL8180=y
CONFIG_RTL8187=y
CONFIG_ADM8211=y
CONFIG_MAC80211_HWSIM=y
CONFIG_P54_COMMON=y
CONFIG_P54_USB=y
CONFIG_P54_PCI=y
CONFIG_ATH5K=y
CONFIG_ATH5K_DEBUG=y
CONFIG_ATH9K=y
CONFIG_IWLWIFI=y
CONFIG_IWLCORE=y
CONFIG_IWLWIFI_LEDS=y
CONFIG_IWLWIFI_RFKILL=y
CONFIG_IWLWIFI_DEBUG=y
CONFIG_IWLWIFI_DEBUGFS=y
CONFIG_IWLAGN=y
CONFIG_IWLAGN_SPECTRUM_MEASUREMENT=y
CONFIG_IWLAGN_LEDS=y
CONFIG_IWL4965=y
CONFIG_IWL5000=y
CONFIG_IWL3945=y
CONFIG_IWL3945_RFKILL=y
CONFIG_IWL3945_SPECTRUM_MEASUREMENT=y
CONFIG_IWL3945_LEDS=y
CONFIG_IWL3945_DEBUG=y
CONFIG_HOSTAP=y
CONFIG_HOSTAP_FIRMWARE=y
CONFIG_HOSTAP_FIRMWARE_NVRAM=y
CONFIG_HOSTAP_PLX=y
CONFIG_HOSTAP_PCI=y
CONFIG_HOSTAP_CS=y
CONFIG_B43=y
CONFIG_B43_PCI_AUTOSELECT=y
CONFIG_B43_PCICORE_AUTOSELECT=y
CONFIG_B43_PCMCIA=y
CONFIG_B43_PIO=y
CONFIG_B43_LEDS=y
CONFIG_B43_RFKILL=y
CONFIG_B43_DEBUG=y
CONFIG_B43_FORCE_PIO=y
CONFIG_B43LEGACY=y
CONFIG_B43LEGACY_PCI_AUTOSELECT=y
CONFIG_B43LEGACY_PCICORE_AUTOSELECT=y
CONFIG_B43LEGACY_LEDS=y
CONFIG_B43LEGACY_RFKILL=y
CONFIG_B43LEGACY_DEBUG=y
CONFIG_B43LEGACY_DMA=y
CONFIG_B43LEGACY_PIO=y
CONFIG_B43LEGACY_DMA_AND_PIO_MODE=y
# CONFIG_B43LEGACY_DMA_MODE is not set
# CONFIG_B43LEGACY_PIO_MODE is not set
CONFIG_ZD1211RW=y
CONFIG_ZD1211RW_DEBUG=y

#
# USB Network Adapters
#
CONFIG_USB_CATC=y
CONFIG_USB_KAWETH=y
CONFIG_USB_PEGASUS=y
CONFIG_USB_RTL8150=y
CONFIG_USB_USBNET=y
CONFIG_USB_NET_AX8817X=y
CONFIG_USB_NET_CDCETHER=y
CONFIG_USB_NET_DM9601=y
CONFIG_USB_NET_GL620A=y
CONFIG_USB_NET_NET1080=y
CONFIG_USB_NET_PLUSB=y
CONFIG_USB_NET_MCS7830=y
CONFIG_USB_NET_RNDIS_HOST=y
CONFIG_USB_NET_CDC_SUBSET=y
CONFIG_USB_ALI_M5632=y
CONFIG_USB_AN2720=y
CONFIG_USB_BELKIN=y
CONFIG_USB_ARMLINUX=y
CONFIG_USB_EPSON2888=y
CONFIG_USB_KC2190=y
CONFIG_USB_NET_ZAURUS=y
CONFIG_USB_HSO=y
CONFIG_NET_PCMCIA=y
CONFIG_PCMCIA_3C589=y
CONFIG_PCMCIA_3C574=y
CONFIG_PCMCIA_FMVJ18X=y
CONFIG_PCMCIA_PCNET=y
CONFIG_PCMCIA_NMCLAN=y
CONFIG_PCMCIA_SMC91C92=y
CONFIG_PCMCIA_XIRC2PS=y
CONFIG_PCMCIA_AXNET=y
CONFIG_ARCNET_COM20020_CS=y
CONFIG_WAN=y
CONFIG_HOSTESS_SV11=m
CONFIG_COSA=m
CONFIG_LANMEDIA=y
CONFIG_SEALEVEL_4021=m
CONFIG_HDLC=y
CONFIG_HDLC_RAW=y
CONFIG_HDLC_RAW_ETH=y
CONFIG_HDLC_CISCO=y
CONFIG_HDLC_FR=y
CONFIG_HDLC_PPP=y
CONFIG_HDLC_X25=y
CONFIG_PCI200SYN=y
CONFIG_WANXL=y
CONFIG_PC300=y
CONFIG_PC300_MLPPP=y
CONFIG_PC300TOO=y
CONFIG_N2=y
CONFIG_C101=y
CONFIG_FARSYNC=y
CONFIG_DSCC4=m
CONFIG_DSCC4_PCISYNC=y
CONFIG_DSCC4_PCI_RST=y
CONFIG_DLCI=y
CONFIG_DLCI_MAX=8
CONFIG_SDLA=y
CONFIG_WAN_ROUTER_DRIVERS=y
CONFIG_CYCLADES_SYNC=y
CONFIG_CYCLOMX_X25=y
CONFIG_LAPBETHER=y
CONFIG_X25_ASY=y
CONFIG_SBNI=y
CONFIG_SBNI_MULTILINE=y
CONFIG_ATM_DRIVERS=y
CONFIG_ATM_DUMMY=y
CONFIG_ATM_TCP=y
CONFIG_ATM_LANAI=y
CONFIG_ATM_ENI=y
CONFIG_ATM_ENI_DEBUG=y
CONFIG_ATM_ENI_TUNE_BURST=y
CONFIG_ATM_ENI_BURST_TX_16W=y
CONFIG_ATM_ENI_BURST_TX_8W=y
CONFIG_ATM_ENI_BURST_TX_4W=y
CONFIG_ATM_ENI_BURST_TX_2W=y
CONFIG_ATM_ENI_BURST_RX_16W=y
CONFIG_ATM_ENI_BURST_RX_8W=y
CONFIG_ATM_ENI_BURST_RX_4W=y
CONFIG_ATM_ENI_BURST_RX_2W=y
CONFIG_ATM_FIRESTREAM=y
CONFIG_ATM_ZATM=y
CONFIG_ATM_ZATM_DEBUG=y
CONFIG_ATM_NICSTAR=y
CONFIG_ATM_NICSTAR_USE_SUNI=y
CONFIG_ATM_NICSTAR_USE_IDT77105=y
CONFIG_ATM_IDT77252=y
CONFIG_ATM_IDT77252_DEBUG=y
CONFIG_ATM_IDT77252_RCV_ALL=y
CONFIG_ATM_IDT77252_USE_SUNI=y
CONFIG_ATM_AMBASSADOR=y
CONFIG_ATM_AMBASSADOR_DEBUG=y
CONFIG_ATM_HORIZON=y
CONFIG_ATM_HORIZON_DEBUG=y
CONFIG_ATM_IA=y
CONFIG_ATM_IA_DEBUG=y
CONFIG_ATM_FORE200E=y
CONFIG_ATM_FORE200E_USE_TASKLET=y
CONFIG_ATM_FORE200E_TX_RETRY=16
CONFIG_ATM_FORE200E_DEBUG=0
CONFIG_ATM_HE=y
CONFIG_ATM_HE_USE_SUNI=y
CONFIG_FDDI=y
CONFIG_DEFXX=y
CONFIG_DEFXX_MMIO=y
CONFIG_SKFP=y
CONFIG_HIPPI=y
CONFIG_ROADRUNNER=y
CONFIG_ROADRUNNER_LARGE_RINGS=y
CONFIG_PLIP=y
CONFIG_PPP=y
CONFIG_PPP_MULTILINK=y
CONFIG_PPP_FILTER=y
CONFIG_PPP_ASYNC=y
CONFIG_PPP_SYNC_TTY=y
CONFIG_PPP_DEFLATE=y
CONFIG_PPP_BSDCOMP=y
CONFIG_PPP_MPPE=y
CONFIG_PPPOE=y
CONFIG_PPPOATM=y
CONFIG_PPPOL2TP=y
CONFIG_SLIP=y
CONFIG_SLIP_COMPRESSED=y
CONFIG_SLHC=y
CONFIG_SLIP_SMART=y
CONFIG_SLIP_MODE_SLIP6=y
CONFIG_NET_FC=y
CONFIG_NETCONSOLE=y
CONFIG_NETCONSOLE_DYNAMIC=y
CONFIG_NETPOLL=y
CONFIG_NETPOLL_TRAP=y
CONFIG_NET_POLL_CONTROLLER=y
CONFIG_VIRTIO_NET=y
CONFIG_ISDN=y
CONFIG_ISDN_I4L=y
CONFIG_ISDN_PPP=y
CONFIG_ISDN_PPP_VJ=y
CONFIG_ISDN_MPP=y
CONFIG_IPPP_FILTER=y
CONFIG_ISDN_PPP_BSDCOMP=y
CONFIG_ISDN_AUDIO=y
CONFIG_ISDN_TTY_FAX=y
CONFIG_ISDN_X25=y

#
# ISDN feature submodules
#
CONFIG_ISDN_DIVERSION=y

#
# ISDN4Linux hardware drivers
#

#
# Passive cards
#
CONFIG_ISDN_DRV_HISAX=y

#
# D-channel protocol features
#
CONFIG_HISAX_EURO=y
CONFIG_DE_AOC=y
CONFIG_HISAX_NO_SENDCOMPLETE=y
CONFIG_HISAX_NO_LLC=y
CONFIG_HISAX_NO_KEYPAD=y
CONFIG_HISAX_1TR6=y
CONFIG_HISAX_NI1=y
CONFIG_HISAX_MAX_CARDS=8

#
# HiSax supported cards
#
CONFIG_HISAX_16_0=y
CONFIG_HISAX_16_3=y
CONFIG_HISAX_TELESPCI=y
CONFIG_HISAX_S0BOX=y
CONFIG_HISAX_AVM_A1=y
CONFIG_HISAX_FRITZPCI=y
CONFIG_HISAX_AVM_A1_PCMCIA=y
CONFIG_HISAX_ELSA=y
CONFIG_HISAX_IX1MICROR2=y
CONFIG_HISAX_DIEHLDIVA=y
CONFIG_HISAX_ASUSCOM=y
CONFIG_HISAX_TELEINT=y
CONFIG_HISAX_HFCS=y
CONFIG_HISAX_SEDLBAUER=y
CONFIG_HISAX_SPORTSTER=y
CONFIG_HISAX_MIC=y
CONFIG_HISAX_NETJET=y
CONFIG_HISAX_NETJET_U=y
CONFIG_HISAX_NICCY=y
CONFIG_HISAX_ISURF=y
CONFIG_HISAX_HSTSAPHIR=y
CONFIG_HISAX_BKM_A4T=y
CONFIG_HISAX_SCT_QUADRO=y
CONFIG_HISAX_GAZEL=y
CONFIG_HISAX_HFC_PCI=y
CONFIG_HISAX_W6692=y
CONFIG_HISAX_HFC_SX=y
CONFIG_HISAX_ENTERNOW_PCI=y
CONFIG_HISAX_DEBUG=y

#
# HiSax PCMCIA card service modules
#
CONFIG_HISAX_SEDLBAUER_CS=y
CONFIG_HISAX_ELSA_CS=y
CONFIG_HISAX_AVM_A1_CS=y
CONFIG_HISAX_TELES_CS=y

#
# HiSax sub driver modules
#
CONFIG_HISAX_ST5481=y
CONFIG_HISAX_HFCUSB=y
CONFIG_HISAX_HFC4S8S=y
CONFIG_HISAX_FRITZ_PCIPNP=y
CONFIG_HISAX_HDLC=y

#
# Active cards
#
CONFIG_ISDN_DRV_PCBIT=y
CONFIG_ISDN_DRV_SC=y
CONFIG_ISDN_DRV_ACT2000=y
CONFIG_HYSDN=m
CONFIG_HYSDN_CAPI=y
CONFIG_ISDN_DRV_GIGASET=y
CONFIG_GIGASET_BASE=y
CONFIG_GIGASET_M105=y
CONFIG_GIGASET_M101=y
CONFIG_GIGASET_DEBUG=y
CONFIG_GIGASET_UNDOCREQ=y
CONFIG_ISDN_CAPI=y
CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON=y
CONFIG_CAPI_TRACE=y
CONFIG_ISDN_CAPI_MIDDLEWARE=y
CONFIG_ISDN_CAPI_CAPI20=y
CONFIG_ISDN_CAPI_CAPIFS_BOOL=y
CONFIG_ISDN_CAPI_CAPIFS=y
CONFIG_ISDN_CAPI_CAPIDRV=y

#
# CAPI hardware drivers
#
CONFIG_CAPI_AVM=y
CONFIG_ISDN_DRV_AVMB1_B1ISA=y
CONFIG_ISDN_DRV_AVMB1_B1PCI=y
CONFIG_ISDN_DRV_AVMB1_B1PCIV4=y
CONFIG_ISDN_DRV_AVMB1_T1ISA=y
CONFIG_ISDN_DRV_AVMB1_B1PCMCIA=y
CONFIG_ISDN_DRV_AVMB1_AVM_CS=y
CONFIG_ISDN_DRV_AVMB1_T1PCI=y
CONFIG_ISDN_DRV_AVMB1_C4=y
CONFIG_CAPI_EICON=y
CONFIG_ISDN_DIVAS=y
CONFIG_ISDN_DIVAS_BRIPCI=y
CONFIG_ISDN_DIVAS_PRIPCI=y
CONFIG_ISDN_DIVAS_DIVACAPI=y
CONFIG_ISDN_DIVAS_USERIDI=y
CONFIG_ISDN_DIVAS_MAINT=m
CONFIG_PHONE=y

#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_FF_MEMLESS=y
CONFIG_INPUT_POLLDEV=y

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_JOYDEV=y
CONFIG_INPUT_EVDEV=y
CONFIG_INPUT_EVBUG=y

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
CONFIG_KEYBOARD_SUNKBD=y
CONFIG_KEYBOARD_LKKBD=y
CONFIG_KEYBOARD_XTKBD=y
CONFIG_KEYBOARD_NEWTON=y
CONFIG_KEYBOARD_STOWAWAY=y
CONFIG_KEYBOARD_GPIO=y
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_LIFEBOOK=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
CONFIG_MOUSE_PS2_TOUCHKIT=y
CONFIG_MOUSE_SERIAL=y
CONFIG_MOUSE_APPLETOUCH=y
CONFIG_MOUSE_BCM5974=y
CONFIG_MOUSE_INPORT=y
CONFIG_MOUSE_ATIXL=y
CONFIG_MOUSE_LOGIBM=y
CONFIG_MOUSE_PC110PAD=y
CONFIG_MOUSE_VSXXXAA=y
CONFIG_MOUSE_GPIO=y
CONFIG_INPUT_JOYSTICK=y
CONFIG_JOYSTICK_ANALOG=y
CONFIG_JOYSTICK_A3D=y
CONFIG_JOYSTICK_ADI=y
CONFIG_JOYSTICK_COBRA=y
CONFIG_JOYSTICK_GF2K=y
CONFIG_JOYSTICK_GRIP=y
CONFIG_JOYSTICK_GRIP_MP=y
CONFIG_JOYSTICK_GUILLEMOT=y
CONFIG_JOYSTICK_INTERACT=y
CONFIG_JOYSTICK_SIDEWINDER=y
CONFIG_JOYSTICK_TMDC=y
CONFIG_JOYSTICK_IFORCE=y
CONFIG_JOYSTICK_IFORCE_USB=y
CONFIG_JOYSTICK_IFORCE_232=y
CONFIG_JOYSTICK_WARRIOR=y
CONFIG_JOYSTICK_MAGELLAN=y
CONFIG_JOYSTICK_SPACEORB=y
CONFIG_JOYSTICK_SPACEBALL=y
CONFIG_JOYSTICK_STINGER=y
CONFIG_JOYSTICK_TWIDJOY=y
CONFIG_JOYSTICK_ZHENHUA=y
CONFIG_JOYSTICK_DB9=y
CONFIG_JOYSTICK_GAMECON=y
CONFIG_JOYSTICK_TURBOGRAFX=y
CONFIG_JOYSTICK_JOYDUMP=y
CONFIG_JOYSTICK_XPAD=y
CONFIG_JOYSTICK_XPAD_FF=y
CONFIG_JOYSTICK_XPAD_LEDS=y
CONFIG_INPUT_TABLET=y
CONFIG_TABLET_USB_ACECAD=y
CONFIG_TABLET_USB_AIPTEK=y
CONFIG_TABLET_USB_GTCO=y
CONFIG_TABLET_USB_KBTAB=y
CONFIG_TABLET_USB_WACOM=y
CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_TOUCHSCREEN_ADS7846=y
CONFIG_TOUCHSCREEN_FUJITSU=y
CONFIG_TOUCHSCREEN_GUNZE=y
CONFIG_TOUCHSCREEN_ELO=y
CONFIG_TOUCHSCREEN_MTOUCH=y
CONFIG_TOUCHSCREEN_INEXIO=y
CONFIG_TOUCHSCREEN_MK712=y
CONFIG_TOUCHSCREEN_HTCPEN=y
CONFIG_TOUCHSCREEN_PENMOUNT=y
CONFIG_TOUCHSCREEN_TOUCHRIGHT=y
CONFIG_TOUCHSCREEN_TOUCHWIN=y
CONFIG_TOUCHSCREEN_UCB1400=y
CONFIG_TOUCHSCREEN_WM97XX=y
CONFIG_TOUCHSCREEN_WM9705=y
CONFIG_TOUCHSCREEN_WM9712=y
CONFIG_TOUCHSCREEN_WM9713=y
CONFIG_TOUCHSCREEN_USB_COMPOSITE=y
CONFIG_TOUCHSCREEN_USB_EGALAX=y
CONFIG_TOUCHSCREEN_USB_PANJIT=y
CONFIG_TOUCHSCREEN_USB_3M=y
CONFIG_TOUCHSCREEN_USB_ITM=y
CONFIG_TOUCHSCREEN_USB_ETURBO=y
CONFIG_TOUCHSCREEN_USB_GUNZE=y
CONFIG_TOUCHSCREEN_USB_DMC_TSC10=y
CONFIG_TOUCHSCREEN_USB_IRTOUCH=y
CONFIG_TOUCHSCREEN_USB_IDEALTEK=y
CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH=y
CONFIG_TOUCHSCREEN_USB_GOTOP=y
CONFIG_TOUCHSCREEN_TOUCHIT213=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_PCSPKR=y
CONFIG_INPUT_APANEL=y
CONFIG_INPUT_WISTRON_BTNS=y
CONFIG_INPUT_ATLAS_BTNS=y
CONFIG_INPUT_ATI_REMOTE=y
CONFIG_INPUT_ATI_REMOTE2=y
CONFIG_INPUT_KEYSPAN_REMOTE=y
CONFIG_INPUT_POWERMATE=y
CONFIG_INPUT_YEALINK=y
CONFIG_INPUT_UINPUT=y

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
CONFIG_SERIO_CT82C710=y
CONFIG_SERIO_PARKBD=y
CONFIG_SERIO_PCIPS2=y
CONFIG_SERIO_LIBPS2=y
CONFIG_SERIO_RAW=y
CONFIG_GAMEPORT=y
CONFIG_GAMEPORT_NS558=y
CONFIG_GAMEPORT_L4=y
CONFIG_GAMEPORT_EMU10K1=y
CONFIG_GAMEPORT_FM801=y

#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_DEVKMEM=y
CONFIG_SERIAL_NONSTANDARD=y
CONFIG_COMPUTONE=y
CONFIG_ROCKETPORT=y
CONFIG_CYCLADES=y
CONFIG_CYZ_INTR=y
CONFIG_DIGIEPCA=y
CONFIG_ESPSERIAL=y
CONFIG_MOXA_INTELLIO=y
CONFIG_MOXA_SMARTIO=y
CONFIG_ISI=y
CONFIG_SYNCLINK=y
CONFIG_SYNCLINKMP=y
CONFIG_SYNCLINK_GT=y
CONFIG_N_HDLC=y
CONFIG_RISCOM8=y
CONFIG_SPECIALIX=y
CONFIG_SX=y
CONFIG_RIO=y
CONFIG_RIO_OLDPCI=y
CONFIG_STALDRV=y
CONFIG_NOZOMI=y

#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_CS=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_FOURPORT=y
CONFIG_SERIAL_8250_ACCENT=y
CONFIG_SERIAL_8250_BOCA=y
CONFIG_SERIAL_8250_EXAR_ST16C554=y
CONFIG_SERIAL_8250_HUB6=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
CONFIG_SERIAL_8250_DETECT_IRQ=y
CONFIG_SERIAL_8250_RSA=y
CONFIG_SERIAL_8250_MCA=y

#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_CONSOLE_POLL=y
CONFIG_SERIAL_JSM=y
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
CONFIG_PRINTER=y
CONFIG_LP_CONSOLE=y
CONFIG_PPDEV=y
CONFIG_HVC_DRIVER=y
CONFIG_VIRTIO_CONSOLE=y
CONFIG_IPMI_HANDLER=y
CONFIG_IPMI_PANIC_EVENT=y
CONFIG_IPMI_PANIC_STRING=y
CONFIG_IPMI_DEVICE_INTERFACE=y
CONFIG_IPMI_SI=y
CONFIG_IPMI_WATCHDOG=y
CONFIG_IPMI_POWEROFF=y
CONFIG_HW_RANDOM=y
CONFIG_HW_RANDOM_INTEL=y
CONFIG_HW_RANDOM_AMD=y
CONFIG_HW_RANDOM_GEODE=y
CONFIG_HW_RANDOM_VIA=y
CONFIG_HW_RANDOM_VIRTIO=y
CONFIG_NVRAM=y
CONFIG_DTLK=y
CONFIG_R3964=y
CONFIG_APPLICOM=y
CONFIG_SONYPI=y

#
# PCMCIA character devices
#
CONFIG_SYNCLINK_CS=y
CONFIG_CARDMAN_4000=y
CONFIG_CARDMAN_4040=y
CONFIG_IPWIRELESS=y
CONFIG_MWAVE=y
CONFIG_SCx200_GPIO=y
CONFIG_PC8736x_GPIO=y
CONFIG_NSC_GPIO=y
CONFIG_CS5535_GPIO=y
CONFIG_RAW_DRIVER=y
CONFIG_MAX_RAW_DEVS=256
CONFIG_HPET=y
CONFIG_HPET_MMAP=y
CONFIG_HANGCHECK_TIMER=y
CONFIG_TCG_TPM=y
CONFIG_TCG_TIS=y
CONFIG_TCG_NSC=y
CONFIG_TCG_ATMEL=y
CONFIG_TCG_INFINEON=y
CONFIG_TELCLOCK=y
CONFIG_DEVPORT=y
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_ALGOBIT=y
CONFIG_I2C_ALGOPCA=y

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
CONFIG_I2C_ALI1535=y
CONFIG_I2C_ALI1563=y
CONFIG_I2C_ALI15X3=y
CONFIG_I2C_AMD756=y
CONFIG_I2C_AMD8111=y
CONFIG_I2C_I801=y
CONFIG_I2C_ISCH=y
CONFIG_I2C_PIIX4=y
CONFIG_I2C_NFORCE2=y
CONFIG_I2C_SIS5595=y
CONFIG_I2C_SIS630=y
CONFIG_I2C_SIS96X=y
CONFIG_I2C_VIA=y
CONFIG_I2C_VIAPRO=y

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
CONFIG_I2C_GPIO=y
CONFIG_I2C_OCORES=y
CONFIG_I2C_SIMTEC=y

#
# External I2C/SMBus adapter drivers
#
CONFIG_I2C_PARPORT=y
CONFIG_I2C_PARPORT_LIGHT=y
CONFIG_I2C_TAOS_EVM=y
CONFIG_I2C_TINY_USB=y

#
# Graphics adapter I2C/DDC channel drivers
#
CONFIG_I2C_VOODOO3=y

#
# Other I2C/SMBus bus drivers
#
CONFIG_I2C_PCA_PLATFORM=y
CONFIG_I2C_STUB=m
CONFIG_SCx200_I2C=y
CONFIG_SCx200_I2C_SCL=12
CONFIG_SCx200_I2C_SDA=13
CONFIG_SCx200_ACB=y

#
# Miscellaneous I2C Chip support
#
CONFIG_DS1682=y
CONFIG_AT24=y
CONFIG_SENSORS_EEPROM=y
CONFIG_SENSORS_PCF8591=y
CONFIG_TPS65010=y
CONFIG_SENSORS_MAX6875=y
CONFIG_SENSORS_TSL2550=y
CONFIG_I2C_DEBUG_CORE=y
CONFIG_I2C_DEBUG_ALGO=y
CONFIG_I2C_DEBUG_BUS=y
CONFIG_I2C_DEBUG_CHIP=y
CONFIG_SPI=y
CONFIG_SPI_DEBUG=y
CONFIG_SPI_MASTER=y

#
# SPI Master Controller Drivers
#
CONFIG_SPI_BITBANG=y
CONFIG_SPI_BUTTERFLY=y
CONFIG_SPI_LM70_LLP=y

#
# SPI Protocol Masters
#
CONFIG_SPI_AT25=y
CONFIG_SPI_SPIDEV=y
CONFIG_SPI_TLE62X0=y
CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
CONFIG_GPIOLIB=y
CONFIG_DEBUG_GPIO=y
CONFIG_GPIO_SYSFS=y

#
# I2C GPIO expanders:
#
CONFIG_GPIO_MAX732X=y
CONFIG_GPIO_PCA953X=y
CONFIG_GPIO_PCF857X=y

#
# PCI GPIO expanders:
#

#
# SPI GPIO expanders:
#
CONFIG_GPIO_MAX7301=y
CONFIG_GPIO_MCP23S08=y
CONFIG_W1=y
CONFIG_W1_CON=y

#
# 1-wire Bus Masters
#
CONFIG_W1_MASTER_MATROX=y
CONFIG_W1_MASTER_DS2490=y
CONFIG_W1_MASTER_DS2482=y
CONFIG_W1_MASTER_GPIO=y

#
# 1-wire Slaves
#
CONFIG_W1_SLAVE_THERM=y
CONFIG_W1_SLAVE_SMEM=y
CONFIG_W1_SLAVE_DS2433=y
CONFIG_W1_SLAVE_DS2433_CRC=y
CONFIG_W1_SLAVE_DS2760=y
CONFIG_POWER_SUPPLY=y
CONFIG_POWER_SUPPLY_DEBUG=y
CONFIG_PDA_POWER=y
CONFIG_BATTERY_DS2760=y
CONFIG_BATTERY_OLPC=y
CONFIG_HWMON=y
CONFIG_HWMON_VID=y
CONFIG_SENSORS_ABITUGURU=y
CONFIG_SENSORS_ABITUGURU3=y
CONFIG_SENSORS_AD7414=y
CONFIG_SENSORS_AD7418=y
CONFIG_SENSORS_ADCXX=y
CONFIG_SENSORS_ADM1021=y
CONFIG_SENSORS_ADM1025=y
CONFIG_SENSORS_ADM1026=y
CONFIG_SENSORS_ADM1029=y
CONFIG_SENSORS_ADM1031=y
CONFIG_SENSORS_ADM9240=y
CONFIG_SENSORS_ADT7470=y
CONFIG_SENSORS_ADT7473=y
CONFIG_SENSORS_K8TEMP=y
CONFIG_SENSORS_ASB100=y
CONFIG_SENSORS_ATXP1=y
CONFIG_SENSORS_DS1621=y
CONFIG_SENSORS_I5K_AMB=y
CONFIG_SENSORS_F71805F=y
CONFIG_SENSORS_F71882FG=y
CONFIG_SENSORS_F75375S=y
CONFIG_SENSORS_FSCHER=y
CONFIG_SENSORS_FSCPOS=y
CONFIG_SENSORS_FSCHMD=y
CONFIG_SENSORS_GL518SM=y
CONFIG_SENSORS_GL520SM=y
CONFIG_SENSORS_CORETEMP=y
CONFIG_SENSORS_IBMAEM=y
CONFIG_SENSORS_IBMPEX=y
CONFIG_SENSORS_IT87=y
CONFIG_SENSORS_LM63=y
CONFIG_SENSORS_LM70=y
CONFIG_SENSORS_LM75=y
CONFIG_SENSORS_LM77=y
CONFIG_SENSORS_LM78=y
CONFIG_SENSORS_LM80=y
CONFIG_SENSORS_LM83=y
CONFIG_SENSORS_LM85=y
CONFIG_SENSORS_LM87=y
CONFIG_SENSORS_LM90=y
CONFIG_SENSORS_LM92=y
CONFIG_SENSORS_LM93=y
CONFIG_SENSORS_MAX1619=y
CONFIG_SENSORS_MAX6650=y
CONFIG_SENSORS_PC87360=y
CONFIG_SENSORS_PC87427=y
CONFIG_SENSORS_SIS5595=y
CONFIG_SENSORS_DME1737=y
CONFIG_SENSORS_SMSC47M1=y
CONFIG_SENSORS_SMSC47M192=y
CONFIG_SENSORS_SMSC47B397=y
CONFIG_SENSORS_ADS7828=y
CONFIG_SENSORS_THMC50=y
CONFIG_SENSORS_VIA686A=y
CONFIG_SENSORS_VT1211=y
CONFIG_SENSORS_VT8231=y
CONFIG_SENSORS_W83781D=y
CONFIG_SENSORS_W83791D=y
CONFIG_SENSORS_W83792D=y
CONFIG_SENSORS_W83793=y
CONFIG_SENSORS_W83L785TS=y
CONFIG_SENSORS_W83L786NG=y
CONFIG_SENSORS_W83627HF=y
CONFIG_SENSORS_W83627EHF=y
CONFIG_SENSORS_HDAPS=y
CONFIG_SENSORS_APPLESMC=y
CONFIG_HWMON_DEBUG_CHIP=y
CONFIG_THERMAL=y
CONFIG_THERMAL_HWMON=y
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_NOWAYOUT=y

#
# Watchdog Device Drivers
#
CONFIG_SOFT_WATCHDOG=y
CONFIG_ACQUIRE_WDT=y
CONFIG_ADVANTECH_WDT=y
CONFIG_ALIM1535_WDT=y
CONFIG_ALIM7101_WDT=y
CONFIG_SC520_WDT=y
CONFIG_IB700_WDT=y
CONFIG_IBMASR=y
CONFIG_WAFER_WDT=y
CONFIG_I6300ESB_WDT=y
CONFIG_ITCO_WDT=y
CONFIG_ITCO_VENDOR_SUPPORT=y
CONFIG_IT8712F_WDT=y
CONFIG_HP_WATCHDOG=y
CONFIG_SC1200_WDT=y
CONFIG_SCx200_WDT=y
CONFIG_PC87413_WDT=y
CONFIG_RDC321X_WDT=y
CONFIG_60XX_WDT=y
CONFIG_SBC8360_WDT=y
CONFIG_SBC7240_WDT=y
CONFIG_CPU5_WDT=y
CONFIG_SMSC37B787_WDT=y
CONFIG_W83627HF_WDT=y
CONFIG_W83697HF_WDT=y
CONFIG_W83877F_WDT=y
CONFIG_W83977F_WDT=y
CONFIG_MACHZ_WDT=y
CONFIG_SBC_EPX_C3_WATCHDOG=y

#
# ISA-based Watchdog Cards
#
CONFIG_PCWATCHDOG=y
CONFIG_MIXCOMWD=y

#
# PCI-based Watchdog Cards
#
CONFIG_PCIPCWATCHDOG=y
CONFIG_WDTPCI=y
CONFIG_WDT_501_PCI=y

#
# USB-based Watchdog Cards
#
CONFIG_USBPCWATCHDOG=y

#
# Sonics Silicon Backplane
#
CONFIG_SSB_POSSIBLE=y
CONFIG_SSB=y
CONFIG_SSB_SPROM=y
CONFIG_SSB_BLOCKIO=y
CONFIG_SSB_PCIHOST_POSSIBLE=y
CONFIG_SSB_PCIHOST=y
CONFIG_SSB_B43_PCI_BRIDGE=y
CONFIG_SSB_PCMCIAHOST_POSSIBLE=y
CONFIG_SSB_PCMCIAHOST=y
CONFIG_SSB_SILENT=y
CONFIG_SSB_DRIVER_PCICORE_POSSIBLE=y
CONFIG_SSB_DRIVER_PCICORE=y

#
# Multifunction device drivers
#
# CONFIG_MFD_CORE is not set
CONFIG_MFD_SM501=y
CONFIG_HTC_PASIC3=y
# CONFIG_MFD_TMIO is not set

#
# Multimedia devices
#

#
# Multimedia core support
#
CONFIG_VIDEO_DEV=y
CONFIG_VIDEO_V4L2_COMMON=y
CONFIG_VIDEO_ALLOW_V4L1=y
CONFIG_VIDEO_V4L1_COMPAT=y
CONFIG_DVB_CORE=y
CONFIG_VIDEO_MEDIA=y

#
# Multimedia drivers
#
CONFIG_VIDEO_SAA7146=y
CONFIG_VIDEO_SAA7146_VV=y
CONFIG_MEDIA_ATTACH=y
CONFIG_MEDIA_TUNER=y
CONFIG_MEDIA_TUNER_CUSTOMIZE=y
CONFIG_MEDIA_TUNER_SIMPLE=y
CONFIG_MEDIA_TUNER_TDA8290=y
CONFIG_MEDIA_TUNER_TDA827X=y
CONFIG_MEDIA_TUNER_TDA18271=y
CONFIG_MEDIA_TUNER_TDA9887=y
CONFIG_MEDIA_TUNER_TEA5761=y
CONFIG_MEDIA_TUNER_TEA5767=y
CONFIG_MEDIA_TUNER_MT20XX=y
CONFIG_MEDIA_TUNER_MT2060=y
CONFIG_MEDIA_TUNER_MT2266=y
CONFIG_MEDIA_TUNER_MT2131=y
CONFIG_MEDIA_TUNER_QT1010=y
CONFIG_MEDIA_TUNER_XC2028=y
CONFIG_MEDIA_TUNER_XC5000=y
CONFIG_MEDIA_TUNER_MXL5005S=y
CONFIG_MEDIA_TUNER_MXL5007T=y
CONFIG_VIDEO_V4L2=y
CONFIG_VIDEO_V4L1=y
CONFIG_VIDEOBUF_GEN=y
CONFIG_VIDEOBUF_DMA_SG=y
CONFIG_VIDEOBUF_VMALLOC=y
CONFIG_VIDEOBUF_DMA_CONTIG=y
CONFIG_VIDEOBUF_DVB=y
CONFIG_VIDEO_BTCX=y
CONFIG_VIDEO_IR=y
CONFIG_VIDEO_TVEEPROM=y
CONFIG_VIDEO_TUNER=y
CONFIG_VIDEO_CAPTURE_DRIVERS=y
CONFIG_VIDEO_ADV_DEBUG=y
CONFIG_VIDEO_HELPER_CHIPS_AUTO=y
CONFIG_VIDEO_IR_I2C=y
CONFIG_VIDEO_TVAUDIO=y
CONFIG_VIDEO_TDA7432=y
CONFIG_VIDEO_TDA9840=y
CONFIG_VIDEO_TDA9875=y
CONFIG_VIDEO_TEA6415C=y
CONFIG_VIDEO_TEA6420=y
CONFIG_VIDEO_MSP3400=y
CONFIG_VIDEO_CS5345=y
CONFIG_VIDEO_CS53L32A=y
CONFIG_VIDEO_M52790=y
CONFIG_VIDEO_WM8775=y
CONFIG_VIDEO_WM8739=y
CONFIG_VIDEO_VP27SMPX=y
CONFIG_VIDEO_BT819=y
CONFIG_VIDEO_BT856=y
CONFIG_VIDEO_KS0127=y
CONFIG_VIDEO_OV7670=y
CONFIG_VIDEO_SAA7110=y
CONFIG_VIDEO_SAA7111=y
CONFIG_VIDEO_SAA7114=y
CONFIG_VIDEO_SAA711X=y
CONFIG_VIDEO_SAA717X=y
CONFIG_VIDEO_TVP5150=y
CONFIG_VIDEO_VPX3220=y
CONFIG_VIDEO_CX25840=y
CONFIG_VIDEO_CX2341X=y
CONFIG_VIDEO_SAA7127=y
CONFIG_VIDEO_SAA7185=y
CONFIG_VIDEO_ADV7170=y
CONFIG_VIDEO_ADV7175=y
CONFIG_VIDEO_UPD64031A=y
CONFIG_VIDEO_UPD64083=y
CONFIG_VIDEO_VIVI=y
CONFIG_VIDEO_BT848=y
CONFIG_VIDEO_BT848_DVB=y
CONFIG_VIDEO_SAA6588=y
CONFIG_VIDEO_BWQCAM=y
CONFIG_VIDEO_CQCAM=y
CONFIG_VIDEO_W9966=y
CONFIG_VIDEO_CPIA=y
CONFIG_VIDEO_CPIA_PP=y
CONFIG_VIDEO_CPIA_USB=y
CONFIG_VIDEO_CPIA2=y
CONFIG_VIDEO_SAA5246A=y
CONFIG_VIDEO_SAA5249=y
CONFIG_TUNER_3036=y
CONFIG_VIDEO_STRADIS=y
CONFIG_VIDEO_ZORAN=y
CONFIG_VIDEO_ZORAN_DC30=y
CONFIG_VIDEO_ZORAN_ZR36060=y
CONFIG_VIDEO_ZORAN_BUZ=y
CONFIG_VIDEO_ZORAN_DC10=y
CONFIG_VIDEO_ZORAN_LML33=y
CONFIG_VIDEO_ZORAN_LML33R10=y
CONFIG_VIDEO_ZORAN_AVS6EYES=y
CONFIG_VIDEO_MEYE=y
CONFIG_VIDEO_SAA7134=y
CONFIG_VIDEO_SAA7134_ALSA=y
CONFIG_VIDEO_SAA7134_DVB=y
CONFIG_VIDEO_MXB=y
CONFIG_VIDEO_DPC=y
CONFIG_VIDEO_HEXIUM_ORION=y
CONFIG_VIDEO_HEXIUM_GEMINI=y
CONFIG_VIDEO_CX88=y
CONFIG_VIDEO_CX88_ALSA=y
CONFIG_VIDEO_CX88_BLACKBIRD=y
CONFIG_VIDEO_CX88_DVB=y
CONFIG_VIDEO_CX88_VP3054=y
CONFIG_VIDEO_CX23885=y
CONFIG_VIDEO_AU0828=y
CONFIG_VIDEO_IVTV=y
CONFIG_VIDEO_FB_IVTV=y
CONFIG_VIDEO_CX18=y
CONFIG_VIDEO_CAFE_CCIC=y
CONFIG_V4L_USB_DRIVERS=y
CONFIG_USB_VIDEO_CLASS=y
CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
CONFIG_USB_GSPCA=y
CONFIG_VIDEO_PVRUSB2=y
CONFIG_VIDEO_PVRUSB2_SYSFS=y
CONFIG_VIDEO_PVRUSB2_DVB=y
CONFIG_VIDEO_PVRUSB2_DEBUGIFC=y
CONFIG_VIDEO_EM28XX=y
CONFIG_VIDEO_EM28XX_ALSA=y
CONFIG_VIDEO_EM28XX_DVB=y
CONFIG_VIDEO_USBVISION=y
CONFIG_VIDEO_USBVIDEO=y
CONFIG_USB_VICAM=y
CONFIG_USB_IBMCAM=y
CONFIG_USB_KONICAWC=y
CONFIG_USB_QUICKCAM_MESSENGER=y
CONFIG_USB_ET61X251=y
CONFIG_VIDEO_OVCAMCHIP=y
CONFIG_USB_W9968CF=y
CONFIG_USB_OV511=y
CONFIG_USB_SE401=y
CONFIG_USB_SN9C102=y
CONFIG_USB_STV680=y
CONFIG_USB_ZC0301=y
CONFIG_USB_PWC=y
CONFIG_USB_PWC_DEBUG=y
CONFIG_USB_ZR364XX=y
CONFIG_USB_STKWEBCAM=y
CONFIG_USB_S2255=y
CONFIG_SOC_CAMERA=y
CONFIG_SOC_CAMERA_MT9M001=y
CONFIG_MT9M001_PCA9536_SWITCH=y
CONFIG_SOC_CAMERA_MT9V022=y
CONFIG_MT9V022_PCA9536_SWITCH=y
CONFIG_SOC_CAMERA_PLATFORM=y
CONFIG_VIDEO_SH_MOBILE_CEU=y
CONFIG_RADIO_ADAPTERS=y
CONFIG_RADIO_CADET=y
CONFIG_RADIO_RTRACK=y
CONFIG_RADIO_RTRACK_PORT=20f
CONFIG_RADIO_RTRACK2=y
CONFIG_RADIO_RTRACK2_PORT=30c
CONFIG_RADIO_AZTECH=y
CONFIG_RADIO_AZTECH_PORT=350
CONFIG_RADIO_GEMTEK=y
CONFIG_RADIO_GEMTEK_PORT=34c
CONFIG_RADIO_GEMTEK_PROBE=y
CONFIG_RADIO_GEMTEK_PCI=y
CONFIG_RADIO_MAXIRADIO=y
CONFIG_RADIO_MAESTRO=y
CONFIG_RADIO_SF16FMI=y
CONFIG_RADIO_SF16FMR2=y
CONFIG_RADIO_TERRATEC=y
CONFIG_RADIO_TERRATEC_PORT=590
CONFIG_RADIO_TRUST=y
CONFIG_RADIO_TRUST_PORT=350
CONFIG_RADIO_TYPHOON=y
CONFIG_RADIO_TYPHOON_PROC_FS=y
CONFIG_RADIO_TYPHOON_PORT=316
CONFIG_RADIO_TYPHOON_MUTEFREQ=87500
CONFIG_RADIO_ZOLTRIX=y
CONFIG_RADIO_ZOLTRIX_PORT=20c
CONFIG_USB_DSBR=y
CONFIG_USB_SI470X=y
CONFIG_DVB_CAPTURE_DRIVERS=y

#
# Supported SAA7146 based PCI Adapters
#
CONFIG_TTPCI_EEPROM=y
CONFIG_DVB_AV7110=y
CONFIG_DVB_AV7110_OSD=y
CONFIG_DVB_BUDGET_CORE=y
CONFIG_DVB_BUDGET=y
CONFIG_DVB_BUDGET_CI=y
CONFIG_DVB_BUDGET_AV=y
CONFIG_DVB_BUDGET_PATCH=y

#
# Supported USB Adapters
#
CONFIG_DVB_USB=y
CONFIG_DVB_USB_DEBUG=y
CONFIG_DVB_USB_A800=y
CONFIG_DVB_USB_DIBUSB_MB=y
CONFIG_DVB_USB_DIBUSB_MB_FAULTY=y
CONFIG_DVB_USB_DIBUSB_MC=y
CONFIG_DVB_USB_DIB0700=y
CONFIG_DVB_USB_UMT_010=y
CONFIG_DVB_USB_CXUSB=y
CONFIG_DVB_USB_M920X=y
CONFIG_DVB_USB_GL861=y
CONFIG_DVB_USB_AU6610=y
CONFIG_DVB_USB_DIGITV=y
CONFIG_DVB_USB_VP7045=y
CONFIG_DVB_USB_VP702X=y
CONFIG_DVB_USB_GP8PSK=y
CONFIG_DVB_USB_NOVA_T_USB2=y
CONFIG_DVB_USB_TTUSB2=y
CONFIG_DVB_USB_DTT200U=y
CONFIG_DVB_USB_OPERA1=y
CONFIG_DVB_USB_DW2102=y
CONFIG_DVB_USB_ANYSEE=y
CONFIG_DVB_TTUSB_BUDGET=y
CONFIG_DVB_TTUSB_DEC=y
CONFIG_DVB_CINERGYT2=y
CONFIG_DVB_CINERGYT2_TUNING=y
CONFIG_DVB_CINERGYT2_STREAM_URB_COUNT=32
CONFIG_DVB_CINERGYT2_STREAM_BUF_SIZE=512
CONFIG_DVB_CINERGYT2_QUERY_INTERVAL=250
CONFIG_DVB_CINERGYT2_ENABLE_RC_INPUT_DEVICE=y
CONFIG_DVB_CINERGYT2_RC_QUERY_INTERVAL=50
CONFIG_DVB_SIANO_SMS1XXX=y
CONFIG_DVB_SIANO_SMS1XXX_SMS_IDS=y

#
# Supported FlexCopII (B2C2) Adapters
#
CONFIG_DVB_B2C2_FLEXCOP=y
CONFIG_DVB_B2C2_FLEXCOP_PCI=y
CONFIG_DVB_B2C2_FLEXCOP_USB=y
CONFIG_DVB_B2C2_FLEXCOP_DEBUG=y

#
# Supported BT878 Adapters
#
CONFIG_DVB_BT8XX=y

#
# Supported Pluto2 Adapters
#
CONFIG_DVB_PLUTO2=y

#
# Supported DVB Frontends
#

#
# Customise DVB Frontends
#
CONFIG_DVB_FE_CUSTOMISE=y

#
# DVB-S (satellite) frontends
#
CONFIG_DVB_CX24110=y
CONFIG_DVB_CX24123=y
CONFIG_DVB_MT312=y
CONFIG_DVB_S5H1420=y
CONFIG_DVB_STV0299=y
CONFIG_DVB_TDA8083=y
CONFIG_DVB_TDA10086=y
CONFIG_DVB_VES1X93=y
CONFIG_DVB_TUNER_ITD1000=y
CONFIG_DVB_TDA826X=y
CONFIG_DVB_TUA6100=y

#
# DVB-T (terrestrial) frontends
#
CONFIG_DVB_SP8870=y
CONFIG_DVB_SP887X=y
CONFIG_DVB_CX22700=y
CONFIG_DVB_CX22702=y
CONFIG_DVB_DRX397XD=y
CONFIG_DVB_L64781=y
CONFIG_DVB_TDA1004X=y
CONFIG_DVB_NXT6000=y
CONFIG_DVB_MT352=y
CONFIG_DVB_ZL10353=y
CONFIG_DVB_DIB3000MB=y
CONFIG_DVB_DIB3000MC=y
CONFIG_DVB_DIB7000M=y
CONFIG_DVB_DIB7000P=y
CONFIG_DVB_TDA10048=y

#
# DVB-C (cable) frontends
#
CONFIG_DVB_VES1820=y
CONFIG_DVB_TDA10021=y
CONFIG_DVB_TDA10023=y
CONFIG_DVB_STV0297=y

#
# ATSC (North American/Korean Terrestrial/Cable DTV) frontends
#
CONFIG_DVB_NXT200X=y
CONFIG_DVB_OR51211=y
CONFIG_DVB_OR51132=y
CONFIG_DVB_BCM3510=y
CONFIG_DVB_LGDT330X=y
CONFIG_DVB_S5H1409=y
CONFIG_DVB_AU8522=y
CONFIG_DVB_S5H1411=y

#
# Digital terrestrial only tuners/PLL
#
CONFIG_DVB_PLL=y
CONFIG_DVB_TUNER_DIB0070=y

#
# SEC control devices for DVB-S
#
CONFIG_DVB_LNBP21=y
CONFIG_DVB_ISL6405=y
CONFIG_DVB_ISL6421=y
CONFIG_DAB=y
CONFIG_USB_DABUSB=y

#
# Graphics support
#
CONFIG_AGP=y
CONFIG_AGP_ALI=y
CONFIG_AGP_ATI=y
CONFIG_AGP_AMD=y
CONFIG_AGP_AMD64=y
CONFIG_AGP_INTEL=y
CONFIG_AGP_NVIDIA=y
CONFIG_AGP_SIS=y
CONFIG_AGP_SWORKS=y
CONFIG_AGP_VIA=y
CONFIG_AGP_EFFICEON=y
CONFIG_DRM=y
CONFIG_DRM_TDFX=y
CONFIG_DRM_R128=y
CONFIG_DRM_RADEON=y
CONFIG_DRM_I810=y
CONFIG_DRM_I830=y
# CONFIG_DRM_I915 is not set
CONFIG_DRM_MGA=y
CONFIG_DRM_SIS=y
CONFIG_DRM_VIA=y
CONFIG_DRM_SAVAGE=y
CONFIG_VGASTATE=y
CONFIG_VIDEO_OUTPUT_CONTROL=y
CONFIG_FB=y
CONFIG_FIRMWARE_EDID=y
CONFIG_FB_DDC=y
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
CONFIG_FB_SYS_FILLRECT=y
CONFIG_FB_SYS_COPYAREA=y
CONFIG_FB_SYS_IMAGEBLIT=y
CONFIG_FB_FOREIGN_ENDIAN=y
CONFIG_FB_BOTH_ENDIAN=y
# CONFIG_FB_BIG_ENDIAN is not set
# CONFIG_FB_LITTLE_ENDIAN is not set
CONFIG_FB_SYS_FOPS=y
CONFIG_FB_DEFERRED_IO=y
CONFIG_FB_HECUBA=y
CONFIG_FB_SVGALIB=y
# CONFIG_FB_MACMODES is not set
CONFIG_FB_BACKLIGHT=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y

#
# Frame buffer hardware drivers
#
CONFIG_FB_PM2=y
CONFIG_FB_PM2_FIFO_DISCONNECT=y
CONFIG_FB_CYBER2000=y
CONFIG_FB_ARC=y
CONFIG_FB_IMSTT=y
CONFIG_FB_UVESA=y
CONFIG_FB_EFI=y
CONFIG_FB_IMAC=y
CONFIG_FB_N411=y
CONFIG_FB_HGA=y
CONFIG_FB_HGA_ACCEL=y
CONFIG_FB_S1D13XXX=y
CONFIG_FB_NVIDIA=y
CONFIG_FB_NVIDIA_I2C=y
CONFIG_FB_NVIDIA_DEBUG=y
CONFIG_FB_NVIDIA_BACKLIGHT=y
CONFIG_FB_RIVA=y
CONFIG_FB_RIVA_I2C=y
CONFIG_FB_RIVA_DEBUG=y
CONFIG_FB_RIVA_BACKLIGHT=y
CONFIG_FB_I810=y
CONFIG_FB_I810_GTF=y
CONFIG_FB_I810_I2C=y
CONFIG_FB_LE80578=y
CONFIG_FB_CARILLO_RANCH=y
CONFIG_FB_INTEL=y
CONFIG_FB_INTEL_DEBUG=y
CONFIG_FB_INTEL_I2C=y
CONFIG_FB_MATROX=y
CONFIG_FB_MATROX_MILLENIUM=y
CONFIG_FB_MATROX_MYSTIQUE=y
CONFIG_FB_MATROX_G=y
CONFIG_FB_MATROX_I2C=y
CONFIG_FB_MATROX_MAVEN=y
CONFIG_FB_MATROX_MULTIHEAD=y
CONFIG_FB_ATY128=y
CONFIG_FB_ATY128_BACKLIGHT=y
CONFIG_FB_ATY=y
CONFIG_FB_ATY_CT=y
CONFIG_FB_ATY_GENERIC_LCD=y
CONFIG_FB_ATY_GX=y
CONFIG_FB_ATY_BACKLIGHT=y
CONFIG_FB_S3=y
CONFIG_FB_SAVAGE=y
CONFIG_FB_SAVAGE_I2C=y
CONFIG_FB_SAVAGE_ACCEL=y
CONFIG_FB_SIS=y
CONFIG_FB_SIS_300=y
CONFIG_FB_SIS_315=y
CONFIG_FB_NEOMAGIC=y
CONFIG_FB_KYRO=y
CONFIG_FB_3DFX=y
CONFIG_FB_3DFX_ACCEL=y
CONFIG_FB_VOODOO1=y
CONFIG_FB_VT8623=y
CONFIG_FB_TRIDENT=y
CONFIG_FB_TRIDENT_ACCEL=y
CONFIG_FB_ARK=y
CONFIG_FB_PM3=y
CONFIG_FB_CARMINE=y
CONFIG_FB_CARMINE_DRAM_EVAL=y
# CONFIG_CARMINE_DRAM_CUSTOM is not set
CONFIG_FB_GEODE=y
CONFIG_FB_GEODE_LX=y
CONFIG_FB_GEODE_GX=y
CONFIG_FB_GEODE_GX1=y
CONFIG_FB_SM501=y
CONFIG_BACKLIGHT_LCD_SUPPORT=y
CONFIG_LCD_CLASS_DEVICE=y
CONFIG_LCD_LTV350QV=y
CONFIG_LCD_ILI9320=y
CONFIG_LCD_VGG2432A4=y
CONFIG_LCD_PLATFORM=y
CONFIG_BACKLIGHT_CLASS_DEVICE=y
CONFIG_BACKLIGHT_CORGI=y
CONFIG_BACKLIGHT_PROGEAR=y
CONFIG_BACKLIGHT_CARILLO_RANCH=y
CONFIG_BACKLIGHT_MBP_NVIDIA=y

#
# Display device support
#
CONFIG_DISPLAY_SUPPORT=y

#
# Display hardware drivers
#

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=64
CONFIG_DUMMY_CONSOLE=y
CONFIG_FONT_8x16=y
CONFIG_LOGO=y
CONFIG_LOGO_LINUX_MONO=y
CONFIG_LOGO_LINUX_VGA16=y
CONFIG_LOGO_LINUX_CLUT224=y
CONFIG_SOUND=y
CONFIG_SND=y
CONFIG_SND_TIMER=y
CONFIG_SND_PCM=y
CONFIG_SND_HWDEP=y
CONFIG_SND_RAWMIDI=y
CONFIG_SND_SEQUENCER=y
CONFIG_SND_SEQ_DUMMY=y
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_DYNAMIC_MINORS=y
CONFIG_SND_SUPPORT_OLD_API=y
CONFIG_SND_VERBOSE_PROCFS=y
CONFIG_SND_VERBOSE_PRINTK=y
CONFIG_SND_DEBUG=y
CONFIG_SND_DEBUG_VERBOSE=y
CONFIG_SND_PCM_XRUN_DEBUG=y
CONFIG_SND_VMASTER=y
CONFIG_SND_MPU401_UART=y
CONFIG_SND_OPL3_LIB=y
CONFIG_SND_OPL4_LIB=y
CONFIG_SND_VX_LIB=y
CONFIG_SND_AC97_CODEC=y
CONFIG_SND_DRIVERS=y
CONFIG_SND_PCSP=y
CONFIG_SND_DUMMY=y
CONFIG_SND_VIRMIDI=y
CONFIG_SND_MTPAV=y
CONFIG_SND_MTS64=y
CONFIG_SND_SERIAL_U16550=y
CONFIG_SND_MPU401=y
CONFIG_SND_PORTMAN2X4=y
CONFIG_SND_AC97_POWER_SAVE=y
CONFIG_SND_AC97_POWER_SAVE_DEFAULT=0
CONFIG_SND_AD1848_LIB=y
CONFIG_SND_CS4231_LIB=y
CONFIG_SND_SB_COMMON=y
CONFIG_SND_SB8_DSP=y
CONFIG_SND_SB16_DSP=y
CONFIG_SND_ISA=y
CONFIG_SND_ADLIB=y
CONFIG_SND_AD1816A=y
CONFIG_SND_AD1848=y
CONFIG_SND_ALS100=y
CONFIG_SND_AZT2320=y
CONFIG_SND_CMI8330=y
CONFIG_SND_CS4231=y
CONFIG_SND_CS4232=y
CONFIG_SND_CS4236=y
CONFIG_SND_DT019X=y
CONFIG_SND_ES968=y
CONFIG_SND_ES1688=y
CONFIG_SND_ES18XX=y
CONFIG_SND_SC6000=y
CONFIG_SND_GUSCLASSIC=y
CONFIG_SND_GUSEXTREME=y
CONFIG_SND_GUSMAX=y
CONFIG_SND_INTERWAVE=y
CONFIG_SND_INTERWAVE_STB=y
CONFIG_SND_OPL3SA2=y
CONFIG_SND_OPTI92X_AD1848=y
CONFIG_SND_OPTI92X_CS4231=y
CONFIG_SND_OPTI93X=y
CONFIG_SND_MIRO=y
CONFIG_SND_SB8=y
CONFIG_SND_SB16=y
CONFIG_SND_SBAWE=y
CONFIG_SND_SB16_CSP=y
CONFIG_SND_SGALAXY=y
CONFIG_SND_SSCAPE=y
CONFIG_SND_WAVEFRONT=y
CONFIG_SND_WAVEFRONT_FIRMWARE_IN_KERNEL=y
CONFIG_SND_PCI=y
CONFIG_SND_AD1889=y
CONFIG_SND_ALS300=y
CONFIG_SND_ALS4000=y
CONFIG_SND_ALI5451=y
CONFIG_SND_ATIIXP=y
CONFIG_SND_ATIIXP_MODEM=y
CONFIG_SND_AU8810=y
CONFIG_SND_AU8820=y
CONFIG_SND_AU8830=y
CONFIG_SND_AW2=y
CONFIG_SND_AZT3328=y
CONFIG_SND_BT87X=y
CONFIG_SND_BT87X_OVERCLOCK=y
CONFIG_SND_CA0106=y
CONFIG_SND_CMIPCI=y
CONFIG_SND_OXYGEN_LIB=y
CONFIG_SND_OXYGEN=y
CONFIG_SND_CS4281=y
CONFIG_SND_CS46XX=y
CONFIG_SND_CS46XX_NEW_DSP=y
CONFIG_SND_CS5530=y
CONFIG_SND_CS5535AUDIO=y
CONFIG_SND_DARLA20=y
CONFIG_SND_GINA20=y
CONFIG_SND_LAYLA20=y
CONFIG_SND_DARLA24=y
CONFIG_SND_GINA24=y
CONFIG_SND_LAYLA24=y
CONFIG_SND_MONA=y
CONFIG_SND_MIA=y
CONFIG_SND_ECHO3G=y
CONFIG_SND_INDIGO=y
CONFIG_SND_INDIGOIO=y
CONFIG_SND_INDIGODJ=y
CONFIG_SND_EMU10K1=y
CONFIG_SND_EMU10K1X=y
CONFIG_SND_ENS1370=y
CONFIG_SND_ENS1371=y
CONFIG_SND_ES1938=y
CONFIG_SND_ES1968=y
CONFIG_SND_FM801=y
CONFIG_SND_FM801_TEA575X_BOOL=y
CONFIG_SND_FM801_TEA575X=y
CONFIG_SND_HDA_INTEL=y
CONFIG_SND_HDA_HWDEP=y
CONFIG_SND_HDA_CODEC_REALTEK=y
CONFIG_SND_HDA_CODEC_ANALOG=y
CONFIG_SND_HDA_CODEC_SIGMATEL=y
CONFIG_SND_HDA_CODEC_VIA=y
CONFIG_SND_HDA_CODEC_ATIHDMI=y
CONFIG_SND_HDA_CODEC_CONEXANT=y
CONFIG_SND_HDA_CODEC_CMEDIA=y
CONFIG_SND_HDA_CODEC_SI3054=y
CONFIG_SND_HDA_GENERIC=y
CONFIG_SND_HDA_POWER_SAVE=y
CONFIG_SND_HDA_POWER_SAVE_DEFAULT=0
CONFIG_SND_HDSP=y
CONFIG_SND_HDSPM=y
CONFIG_SND_HIFIER=y
CONFIG_SND_ICE1712=y
CONFIG_SND_ICE1724=y
CONFIG_SND_INTEL8X0=y
CONFIG_SND_INTEL8X0M=y
CONFIG_SND_KORG1212=y
CONFIG_SND_MAESTRO3=y
CONFIG_SND_MIXART=y
CONFIG_SND_NM256=y
CONFIG_SND_PCXHR=y
CONFIG_SND_RIPTIDE=y
CONFIG_SND_RME32=y
CONFIG_SND_RME96=y
CONFIG_SND_RME9652=y
CONFIG_SND_SIS7019=y
CONFIG_SND_SONICVIBES=y
CONFIG_SND_TRIDENT=y
CONFIG_SND_VIA82XX=y
CONFIG_SND_VIA82XX_MODEM=y
CONFIG_SND_VIRTUOSO=y
CONFIG_SND_VX222=y
CONFIG_SND_YMFPCI=y
CONFIG_SND_SPI=y
CONFIG_SND_USB=y
CONFIG_SND_USB_AUDIO=y
CONFIG_SND_USB_USX2Y=y
CONFIG_SND_USB_CAIAQ=y
CONFIG_SND_USB_CAIAQ_INPUT=y
CONFIG_SND_PCMCIA=y
CONFIG_SND_VXPOCKET=y
CONFIG_SND_PDAUDIOCF=y
CONFIG_SND_SOC=y
CONFIG_SOUND_PRIME=y
CONFIG_SOUND_MSNDCLAS=m
CONFIG_MSNDCLAS_INIT_FILE="/etc/sound/msndinit.bin"
CONFIG_MSNDCLAS_PERM_FILE="/etc/sound/msndperm.bin"
CONFIG_SOUND_MSNDPIN=m
CONFIG_MSNDPIN_INIT_FILE="/etc/sound/pndspini.bin"
CONFIG_MSNDPIN_PERM_FILE="/etc/sound/pndsperm.bin"
CONFIG_SOUND_OSS=y
CONFIG_SOUND_TRACEINIT=y
CONFIG_SOUND_DMAP=y
CONFIG_SOUND_SSCAPE=y
CONFIG_SOUND_VMIDI=y
CONFIG_SOUND_TRIX=y
CONFIG_SOUND_MSS=y
CONFIG_SOUND_MPU401=y
CONFIG_SOUND_PAS=y
CONFIG_PAS_JOYSTICK=y
CONFIG_SOUND_PSS=y
CONFIG_PSS_MIXER=y
CONFIG_SOUND_SB=y
CONFIG_SOUND_YM3812=y
CONFIG_SOUND_UART6850=y
CONFIG_SOUND_AEDSP16=y
CONFIG_SC6600=y
CONFIG_SC6600_JOY=y
CONFIG_SC6600_CDROM=4
CONFIG_SC6600_CDROMBASE=0
CONFIG_AEDSP16_MSS=y
# CONFIG_AEDSP16_SBPRO is not set
CONFIG_SOUND_KAHLUA=y
CONFIG_AC97_BUS=y
CONFIG_HID_SUPPORT=y
CONFIG_HID=y
CONFIG_HID_DEBUG=y
CONFIG_HIDRAW=y

#
# USB Input Devices
#
CONFIG_USB_HID=y
CONFIG_USB_HIDINPUT_POWERBOOK=y
CONFIG_HID_FF=y
CONFIG_HID_PID=y
CONFIG_LOGITECH_FF=y
CONFIG_LOGIRUMBLEPAD2_FF=y
CONFIG_PANTHERLORD_FF=y
CONFIG_THRUSTMASTER_FF=y
CONFIG_ZEROPLUS_FF=y
CONFIG_USB_HIDDEV=y
CONFIG_USB_MOUSE=y
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
CONFIG_USB_DEBUG=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
CONFIG_USB_DEVICE_CLASS=y
CONFIG_USB_DYNAMIC_MINORS=y
CONFIG_USB_SUSPEND=y
# CONFIG_USB_OTG is not set
CONFIG_USB_OTG_WHITELIST=y
CONFIG_USB_OTG_BLACKLIST_HUB=y
CONFIG_USB_MON=y

#
# USB Host Controller Drivers
#
CONFIG_USB_C67X00_HCD=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_ISP116X_HCD=y
CONFIG_USB_ISP1760_HCD=y
CONFIG_USB_ISP1760_PCI=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_SSB=y
# CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
# CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_UHCI_HCD=y
CONFIG_USB_U132_HCD=y
CONFIG_USB_SL811_HCD=y
CONFIG_USB_SL811_CS=y
CONFIG_USB_R8A66597_HCD=y

#
# USB Device Class drivers
#
CONFIG_USB_ACM=y
CONFIG_USB_PRINTER=y
CONFIG_USB_WDM=y

#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#

#
# may also be needed; see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=y
CONFIG_USB_STORAGE_DEBUG=y
CONFIG_USB_STORAGE_DATAFAB=y
CONFIG_USB_STORAGE_FREECOM=y
CONFIG_USB_STORAGE_ISD200=y
CONFIG_USB_STORAGE_DPCM=y
CONFIG_USB_STORAGE_USBAT=y
CONFIG_USB_STORAGE_SDDR09=y
CONFIG_USB_STORAGE_SDDR55=y
CONFIG_USB_STORAGE_JUMPSHOT=y
CONFIG_USB_STORAGE_ALAUDA=y
CONFIG_USB_STORAGE_ONETOUCH=y
CONFIG_USB_STORAGE_KARMA=y
CONFIG_USB_STORAGE_CYPRESS_ATACB=y
CONFIG_USB_LIBUSUAL=y

#
# USB Imaging devices
#
CONFIG_USB_MDC800=y
CONFIG_USB_MICROTEK=y

#
# USB port drivers
#
CONFIG_USB_USS720=y
CONFIG_USB_SERIAL=y
CONFIG_USB_SERIAL_CONSOLE=y
CONFIG_USB_EZUSB=y
CONFIG_USB_SERIAL_GENERIC=y
CONFIG_USB_SERIAL_AIRCABLE=y
CONFIG_USB_SERIAL_ARK3116=y
CONFIG_USB_SERIAL_BELKIN=y
CONFIG_USB_SERIAL_CH341=y
CONFIG_USB_SERIAL_WHITEHEAT=y
CONFIG_USB_SERIAL_DIGI_ACCELEPORT=y
CONFIG_USB_SERIAL_CP2101=y
CONFIG_USB_SERIAL_CYPRESS_M8=y
CONFIG_USB_SERIAL_EMPEG=y
CONFIG_USB_SERIAL_FTDI_SIO=y
CONFIG_USB_SERIAL_FUNSOFT=y
CONFIG_USB_SERIAL_VISOR=y
CONFIG_USB_SERIAL_IPAQ=y
CONFIG_USB_SERIAL_IR=y
CONFIG_USB_SERIAL_EDGEPORT=y
CONFIG_USB_SERIAL_EDGEPORT_TI=y
CONFIG_USB_SERIAL_GARMIN=y
CONFIG_USB_SERIAL_IPW=y
CONFIG_USB_SERIAL_IUU=y
CONFIG_USB_SERIAL_KEYSPAN_PDA=y
CONFIG_USB_SERIAL_KEYSPAN=y
CONFIG_USB_SERIAL_KEYSPAN_MPR=y
CONFIG_USB_SERIAL_KEYSPAN_USA28=y
CONFIG_USB_SERIAL_KEYSPAN_USA28X=y
CONFIG_USB_SERIAL_KEYSPAN_USA28XA=y
CONFIG_USB_SERIAL_KEYSPAN_USA28XB=y
CONFIG_USB_SERIAL_KEYSPAN_USA19=y
CONFIG_USB_SERIAL_KEYSPAN_USA18X=y
CONFIG_USB_SERIAL_KEYSPAN_USA19W=y
CONFIG_USB_SERIAL_KEYSPAN_USA19QW=y
CONFIG_USB_SERIAL_KEYSPAN_USA19QI=y
CONFIG_USB_SERIAL_KEYSPAN_USA49W=y
CONFIG_USB_SERIAL_KEYSPAN_USA49WLC=y
CONFIG_USB_SERIAL_KLSI=y
CONFIG_USB_SERIAL_KOBIL_SCT=y
CONFIG_USB_SERIAL_MCT_U232=y
CONFIG_USB_SERIAL_MOS7720=y
CONFIG_USB_SERIAL_MOS7840=y
CONFIG_USB_SERIAL_MOTOROLA=y
CONFIG_USB_SERIAL_NAVMAN=y
CONFIG_USB_SERIAL_PL2303=y
CONFIG_USB_SERIAL_OTI6858=y
CONFIG_USB_SERIAL_SPCP8X5=y
CONFIG_USB_SERIAL_HP4X=y
CONFIG_USB_SERIAL_SAFE=y
CONFIG_USB_SERIAL_SAFE_PADDED=y
CONFIG_USB_SERIAL_SIERRAWIRELESS=y
CONFIG_USB_SERIAL_TI=y
CONFIG_USB_SERIAL_CYBERJACK=y
CONFIG_USB_SERIAL_XIRCOM=y
CONFIG_USB_SERIAL_OPTION=y
CONFIG_USB_SERIAL_OMNINET=y
CONFIG_USB_SERIAL_DEBUG=y

#
# USB Miscellaneous drivers
#
CONFIG_USB_EMI62=y
CONFIG_USB_EMI26=y
CONFIG_USB_ADUTUX=y
CONFIG_USB_RIO500=y
CONFIG_USB_LEGOTOWER=y
CONFIG_USB_LCD=y
CONFIG_USB_BERRY_CHARGE=y
CONFIG_USB_LED=y
CONFIG_USB_CYPRESS_CY7C63=y
CONFIG_USB_CYTHERM=y
CONFIG_USB_PHIDGET=y
CONFIG_USB_PHIDGETKIT=y
CONFIG_USB_PHIDGETMOTORCONTROL=y
CONFIG_USB_PHIDGETSERVO=y
CONFIG_USB_IDMOUSE=y
CONFIG_USB_FTDI_ELAN=y
CONFIG_USB_APPLEDISPLAY=y
CONFIG_USB_SISUSBVGA=y
CONFIG_USB_SISUSBVGA_CON=y
CONFIG_USB_LD=y
CONFIG_USB_TRANCEVIBRATOR=y
CONFIG_USB_IOWARRIOR=y
CONFIG_USB_TEST=y
CONFIG_USB_ISIGHTFW=y
CONFIG_USB_ATM=y
CONFIG_USB_SPEEDTOUCH=y
CONFIG_USB_CXACRU=y
CONFIG_USB_UEAGLEATM=y
CONFIG_USB_XUSBATM=y
CONFIG_MMC=y
CONFIG_MMC_DEBUG=y
CONFIG_MMC_UNSAFE_RESUME=y

#
# MMC/SD Card Drivers
#
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
CONFIG_SDIO_UART=y
CONFIG_MMC_TEST=y

#
# MMC/SD Host Controller Drivers
#
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_PCI=y
CONFIG_MMC_RICOH_MMC=y
CONFIG_MMC_WBSD=y
CONFIG_MMC_TIFM_SD=y
CONFIG_MMC_SDRICOH_CS=y
CONFIG_MEMSTICK=y
CONFIG_MEMSTICK_DEBUG=y

#
# MemoryStick drivers
#
CONFIG_MEMSTICK_UNSAFE_RESUME=y
CONFIG_MSPRO_BLOCK=y

#
# MemoryStick Host Controller Drivers
#
CONFIG_MEMSTICK_TIFM_MS=y
CONFIG_MEMSTICK_JMICRON_38X=y
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#
CONFIG_LEDS_NET48XX=y
CONFIG_LEDS_WRAP=y
CONFIG_LEDS_PCA9532=y
CONFIG_LEDS_GPIO=y
CONFIG_LEDS_CLEVO_MAIL=y
CONFIG_LEDS_PCA955X=y

#
# LED Triggers
#
CONFIG_LEDS_TRIGGERS=y
CONFIG_LEDS_TRIGGER_TIMER=y
CONFIG_LEDS_TRIGGER_HEARTBEAT=y
CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
CONFIG_ACCESSIBILITY=y
CONFIG_A11Y_BRAILLE_CONSOLE=y
CONFIG_INFINIBAND=y
CONFIG_INFINIBAND_USER_MAD=y
CONFIG_INFINIBAND_USER_ACCESS=y
CONFIG_INFINIBAND_USER_MEM=y
CONFIG_INFINIBAND_ADDR_TRANS=y
CONFIG_INFINIBAND_MTHCA=y
CONFIG_INFINIBAND_MTHCA_DEBUG=y
CONFIG_INFINIBAND_AMSO1100=y
CONFIG_INFINIBAND_AMSO1100_DEBUG=y
CONFIG_INFINIBAND_CXGB3=y
CONFIG_INFINIBAND_CXGB3_DEBUG=y
CONFIG_MLX4_INFINIBAND=y
CONFIG_INFINIBAND_NES=y
CONFIG_INFINIBAND_NES_DEBUG=y
CONFIG_INFINIBAND_IPOIB=y
CONFIG_INFINIBAND_IPOIB_CM=y
CONFIG_INFINIBAND_IPOIB_DEBUG=y
CONFIG_INFINIBAND_IPOIB_DEBUG_DATA=y
CONFIG_INFINIBAND_SRP=y
CONFIG_INFINIBAND_ISER=y
CONFIG_EDAC=y

#
# Reporting subsystems
#
CONFIG_EDAC_DEBUG=y
CONFIG_EDAC_MM_EDAC=y
CONFIG_EDAC_AMD76X=y
CONFIG_EDAC_E7XXX=y
CONFIG_EDAC_E752X=y
CONFIG_EDAC_I82875P=y
CONFIG_EDAC_I82975X=y
CONFIG_EDAC_I3000=y
CONFIG_EDAC_I82860=y
CONFIG_EDAC_R82600=y
CONFIG_EDAC_I5000=y
CONFIG_EDAC_I5100=y
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
CONFIG_RTC_DEBUG=y

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
CONFIG_RTC_INTF_DEV_UIE_EMUL=y
CONFIG_RTC_DRV_TEST=y

#
# I2C RTC drivers
#
CONFIG_RTC_DRV_DS1307=y
CONFIG_RTC_DRV_DS1374=y
CONFIG_RTC_DRV_DS1672=y
CONFIG_RTC_DRV_MAX6900=y
CONFIG_RTC_DRV_RS5C372=y
CONFIG_RTC_DRV_ISL1208=y
CONFIG_RTC_DRV_X1205=y
CONFIG_RTC_DRV_PCF8563=y
CONFIG_RTC_DRV_PCF8583=y
CONFIG_RTC_DRV_M41T80=y
CONFIG_RTC_DRV_M41T80_WDT=y
CONFIG_RTC_DRV_S35390A=y
CONFIG_RTC_DRV_FM3130=y

#
# SPI RTC drivers
#
CONFIG_RTC_DRV_M41T94=y
CONFIG_RTC_DRV_DS1305=y
CONFIG_RTC_DRV_MAX6902=y
CONFIG_RTC_DRV_R9701=y
CONFIG_RTC_DRV_RS5C348=y

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
CONFIG_RTC_DRV_DS1511=y
CONFIG_RTC_DRV_DS1553=y
CONFIG_RTC_DRV_DS1742=y
CONFIG_RTC_DRV_STK17TA8=y
CONFIG_RTC_DRV_M48T86=y
CONFIG_RTC_DRV_M48T59=y
CONFIG_RTC_DRV_V3020=y

#
# on-CPU RTC drivers
#
CONFIG_DMADEVICES=y

#
# DMA Devices
#
CONFIG_INTEL_IOATDMA=y
CONFIG_DMA_ENGINE=y

#
# DMA Clients
#
CONFIG_NET_DMA=y
CONFIG_DMATEST=y
CONFIG_DCA=y
CONFIG_AUXDISPLAY=y
CONFIG_KS0108=y
CONFIG_KS0108_PORT=0x378
CONFIG_KS0108_DELAY=2
CONFIG_CFAG12864B=y
CONFIG_CFAG12864B_RATE=20
CONFIG_UIO=y
CONFIG_UIO_CIF=y
CONFIG_UIO_PDRV=y
CONFIG_UIO_PDRV_GENIRQ=y
CONFIG_UIO_SMX=y

#
# Firmware Drivers
#
CONFIG_EDD=y
CONFIG_EDD_OFF=y
CONFIG_FIRMWARE_MEMMAP=y
CONFIG_EFI_VARS=y
CONFIG_DELL_RBU=y
CONFIG_DCDBAS=y
CONFIG_DMIID=y
CONFIG_ISCSI_IBFT_FIND=y
CONFIG_ISCSI_IBFT=y

#
# File systems
#
CONFIG_EXT2_FS=y
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
CONFIG_EXT2_FS_XIP=y
CONFIG_FS_XIP=y
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
CONFIG_EXT4DEV_FS=y
CONFIG_EXT4DEV_FS_XATTR=y
CONFIG_EXT4DEV_FS_POSIX_ACL=y
CONFIG_EXT4DEV_FS_SECURITY=y
CONFIG_JBD=y
CONFIG_JBD_DEBUG=y
CONFIG_JBD2=y
CONFIG_JBD2_DEBUG=y
CONFIG_FS_MBCACHE=y
CONFIG_REISERFS_FS=y
CONFIG_REISERFS_CHECK=y
CONFIG_REISERFS_PROC_INFO=y
CONFIG_REISERFS_FS_XATTR=y
CONFIG_REISERFS_FS_POSIX_ACL=y
CONFIG_REISERFS_FS_SECURITY=y
CONFIG_JFS_FS=y
CONFIG_JFS_POSIX_ACL=y
CONFIG_JFS_SECURITY=y
CONFIG_JFS_DEBUG=y
CONFIG_JFS_STATISTICS=y
CONFIG_FS_POSIX_ACL=y
CONFIG_XFS_FS=y
CONFIG_XFS_QUOTA=y
CONFIG_XFS_POSIX_ACL=y
CONFIG_XFS_RT=y
CONFIG_XFS_DEBUG=y
CONFIG_GFS2_FS=y
CONFIG_GFS2_FS_LOCKING_DLM=y
CONFIG_OCFS2_FS=y
CONFIG_OCFS2_FS_O2CB=y
CONFIG_OCFS2_FS_USERSPACE_CLUSTER=y
CONFIG_OCFS2_FS_STATS=y
CONFIG_OCFS2_DEBUG_MASKLOG=y
CONFIG_OCFS2_DEBUG_FS=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_QUOTA=y
CONFIG_QUOTA_NETLINK_INTERFACE=y
CONFIG_PRINT_QUOTA_WARNING=y
CONFIG_QFMT_V1=y
CONFIG_QFMT_V2=y
CONFIG_QUOTACTL=y
CONFIG_AUTOFS_FS=y
CONFIG_AUTOFS4_FS=y
CONFIG_FUSE_FS=y
CONFIG_GENERIC_ACL=y

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=y
CONFIG_UDF_NLS=y

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
CONFIG_NTFS_FS=y
CONFIG_NTFS_DEBUG=y
CONFIG_NTFS_RW=y

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_VMCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_CONFIGFS_FS=y

#
# Miscellaneous filesystems
#
CONFIG_ADFS_FS=y
CONFIG_ADFS_FS_RW=y
CONFIG_AFFS_FS=y
CONFIG_HFS_FS=y
CONFIG_HFSPLUS_FS=y
CONFIG_BEFS_FS=y
CONFIG_BEFS_DEBUG=y
CONFIG_BFS_FS=y
CONFIG_EFS_FS=y
CONFIG_CRAMFS=y
CONFIG_VXFS_FS=y
CONFIG_MINIX_FS=y
CONFIG_OMFS_FS=y
CONFIG_HPFS_FS=y
CONFIG_QNX4FS_FS=y
CONFIG_ROMFS_FS=y
CONFIG_SYSV_FS=y
CONFIG_UFS_FS=y
CONFIG_UFS_FS_WRITE=y
CONFIG_UFS_DEBUG=y
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
CONFIG_NFSD=y
CONFIG_NFSD_V2_ACL=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V3_ACL=y
CONFIG_NFSD_V4=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_EXPORTFS=y
CONFIG_NFS_ACL_SUPPORT=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
CONFIG_SUNRPC_XPRT_RDMA=y
CONFIG_RPCSEC_GSS_KRB5=y
CONFIG_RPCSEC_GSS_SPKM3=y
CONFIG_SMB_FS=y
CONFIG_SMB_NLS_DEFAULT=y
CONFIG_SMB_NLS_REMOTE="cp437"
CONFIG_CIFS=y
CONFIG_CIFS_STATS=y
CONFIG_CIFS_STATS2=y
CONFIG_CIFS_WEAK_PW_HASH=y
CONFIG_CIFS_UPCALL=y
CONFIG_CIFS_XATTR=y
CONFIG_CIFS_POSIX=y
CONFIG_CIFS_DEBUG2=y
CONFIG_CIFS_EXPERIMENTAL=y
CONFIG_CIFS_DFS_UPCALL=y
CONFIG_NCP_FS=y
CONFIG_NCPFS_PACKET_SIGNING=y
CONFIG_NCPFS_IOCTL_LOCKING=y
CONFIG_NCPFS_STRONG=y
CONFIG_NCPFS_NFS_NS=y
CONFIG_NCPFS_OS2_NS=y
CONFIG_NCPFS_SMALLDOS=y
CONFIG_NCPFS_NLS=y
CONFIG_NCPFS_EXTRAS=y
CONFIG_CODA_FS=y
CONFIG_AFS_FS=y
CONFIG_AFS_DEBUG=y
CONFIG_9P_FS=y

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
CONFIG_ACORN_PARTITION=y
CONFIG_ACORN_PARTITION_CUMANA=y
CONFIG_ACORN_PARTITION_EESOX=y
CONFIG_ACORN_PARTITION_ICS=y
CONFIG_ACORN_PARTITION_ADFS=y
CONFIG_ACORN_PARTITION_POWERTEC=y
CONFIG_ACORN_PARTITION_RISCIX=y
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
CONFIG_ATARI_PARTITION=y
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
CONFIG_LDM_PARTITION=y
CONFIG_LDM_DEBUG=y
CONFIG_SGI_PARTITION=y
CONFIG_ULTRIX_PARTITION=y
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
CONFIG_SYSV68_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_CODEPAGE_737=y
CONFIG_NLS_CODEPAGE_775=y
CONFIG_NLS_CODEPAGE_850=y
CONFIG_NLS_CODEPAGE_852=y
CONFIG_NLS_CODEPAGE_855=y
CONFIG_NLS_CODEPAGE_857=y
CONFIG_NLS_CODEPAGE_860=y
CONFIG_NLS_CODEPAGE_861=y
CONFIG_NLS_CODEPAGE_862=y
CONFIG_NLS_CODEPAGE_863=y
CONFIG_NLS_CODEPAGE_864=y
CONFIG_NLS_CODEPAGE_865=y
CONFIG_NLS_CODEPAGE_866=y
CONFIG_NLS_CODEPAGE_869=y
CONFIG_NLS_CODEPAGE_936=y
CONFIG_NLS_CODEPAGE_950=y
CONFIG_NLS_CODEPAGE_932=y
CONFIG_NLS_CODEPAGE_949=y
CONFIG_NLS_CODEPAGE_874=y
CONFIG_NLS_ISO8859_8=y
CONFIG_NLS_CODEPAGE_1250=y
CONFIG_NLS_CODEPAGE_1251=y
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=y
CONFIG_NLS_ISO8859_2=y
CONFIG_NLS_ISO8859_3=y
CONFIG_NLS_ISO8859_4=y
CONFIG_NLS_ISO8859_5=y
CONFIG_NLS_ISO8859_6=y
CONFIG_NLS_ISO8859_7=y
CONFIG_NLS_ISO8859_9=y
CONFIG_NLS_ISO8859_13=y
CONFIG_NLS_ISO8859_14=y
CONFIG_NLS_ISO8859_15=y
CONFIG_NLS_KOI8_R=y
CONFIG_NLS_KOI8_U=y
CONFIG_NLS_UTF8=y
CONFIG_DLM=y
CONFIG_DLM_DEBUG=y

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_PRINTK_TIME=y
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=1024
CONFIG_MAGIC_SYSRQ=y
CONFIG_UNUSED_SYMBOLS=y
CONFIG_DEBUG_FS=y
CONFIG_HEADERS_CHECK=y
CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_SHIRQ=y
CONFIG_DETECT_SOFTLOCKUP=y
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC=y
CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=1
CONFIG_SCHED_DEBUG=y
CONFIG_SCHEDSTATS=y
CONFIG_TIMER_STATS=y
CONFIG_DEBUG_OBJECTS=y
CONFIG_DEBUG_OBJECTS_SELFTEST=y
CONFIG_DEBUG_OBJECTS_FREE=y
CONFIG_DEBUG_OBJECTS_TIMERS=y
CONFIG_SLUB_DEBUG_ON=y
CONFIG_SLUB_STATS=y
CONFIG_DEBUG_RT_MUTEXES=y
CONFIG_DEBUG_PI_LIST=y
CONFIG_RT_MUTEX_TESTER=y
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_PROVE_LOCKING=y
CONFIG_LOCKDEP=y
CONFIG_LOCK_STAT=y
CONFIG_DEBUG_LOCKDEP=y
CONFIG_TRACE_IRQFLAGS=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
CONFIG_DEBUG_LOCKING_API_SELFTESTS=y
CONFIG_STACKTRACE=y
CONFIG_DEBUG_HIGHMEM=y
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_VM=y
CONFIG_DEBUG_VIRTUAL=y
CONFIG_DEBUG_WRITECOUNT=y
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_DEBUG_LIST=y
CONFIG_DEBUG_SG=y
CONFIG_DEBUG_NOTIFIERS=y
CONFIG_FRAME_POINTER=y
CONFIG_BOOT_PRINTK_DELAY=y
CONFIG_RCU_TORTURE_TEST=y
CONFIG_RCU_TORTURE_TEST_RUNNABLE=y
CONFIG_RCU_CPU_STALL=y
CONFIG_KPROBES_SANITY_TEST=y
CONFIG_BACKTRACE_SELF_TEST=y
CONFIG_LKDTM=y
CONFIG_FAULT_INJECTION=y
CONFIG_FAILSLAB=y
CONFIG_FAIL_PAGE_ALLOC=y
CONFIG_FAIL_MAKE_REQUEST=y
CONFIG_FAULT_INJECTION_DEBUG_FS=y
CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y
CONFIG_LATENCYTOP=y
CONFIG_SYSCTL_SYSCALL_CHECK=y
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_TRACER_MAX_TRACE=y
CONFIG_RING_BUFFER=y
CONFIG_TRACING=y
CONFIG_FTRACE=y
CONFIG_IRQSOFF_TRACER=y
CONFIG_SYSPROF_TRACER=y
CONFIG_SCHED_TRACER=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_BOOT_TRACER=y
CONFIG_STACK_TRACER=y
CONFIG_DYNAMIC_FTRACE=y
CONFIG_FTRACE_MCOUNT_RECORD=y
CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
CONFIG_FIREWIRE_OHCI_REMOTE_DMA=y
CONFIG_BUILD_DOCSRC=y
CONFIG_SAMPLES=y
CONFIG_SAMPLE_MARKERS=m
CONFIG_SAMPLE_TRACEPOINTS=m
CONFIG_SAMPLE_KOBJECT=y
CONFIG_SAMPLE_KPROBES=m
CONFIG_SAMPLE_KRETPROBES=m
CONFIG_HAVE_ARCH_KGDB=y
CONFIG_KGDB=y
CONFIG_KGDB_SERIAL_CONSOLE=y
CONFIG_KGDB_TESTS=y
CONFIG_STRICT_DEVMEM=y
CONFIG_X86_VERBOSE_BOOTUP=y
CONFIG_EARLY_PRINTK=y
CONFIG_EARLY_PRINTK_DBGP=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_STACK_USAGE=y
CONFIG_DEBUG_PAGEALLOC=y
CONFIG_DEBUG_PER_CPU_MAPS=y
CONFIG_X86_PTDUMP=y
CONFIG_DEBUG_RODATA=y
CONFIG_DEBUG_RODATA_TEST=y
CONFIG_DEBUG_NX_TEST=m
CONFIG_4KSTACKS=y
CONFIG_DOUBLEFAULT=y
CONFIG_MMIOTRACE_HOOKS=y
CONFIG_MMIOTRACE=y
CONFIG_MMIOTRACE_TEST=m
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_IO_DELAY_TYPE_NONE=3
CONFIG_IO_DELAY_0X80=y
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
CONFIG_DEFAULT_IO_DELAY_TYPE=0
CONFIG_DEBUG_BOOT_PARAMS=y
CONFIG_CPA_DEBUG=y
CONFIG_OPTIMIZE_INLINING=y

#
# Security options
#
CONFIG_KEYS=y
CONFIG_KEYS_DEBUG_PROC_KEYS=y
CONFIG_SECURITY=y
CONFIG_SECURITY_NETWORK=y
CONFIG_SECURITY_NETWORK_XFRM=y
CONFIG_SECURITY_FILE_CAPABILITIES=y
CONFIG_SECURITY_DEFAULT_MMAP_MIN_ADDR=0
CONFIG_SECURITY_SELINUX=y
CONFIG_SECURITY_SELINUX_BOOTPARAM=y
CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE=1
CONFIG_SECURITY_SELINUX_DISABLE=y
CONFIG_SECURITY_SELINUX_DEVELOP=y
CONFIG_SECURITY_SELINUX_AVC_STATS=y
CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE=1
CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX=y
CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE=19
CONFIG_XOR_BLOCKS=y
CONFIG_ASYNC_CORE=y
CONFIG_ASYNC_MEMCPY=y
CONFIG_ASYNC_XOR=y
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_GF128MUL=y
CONFIG_CRYPTO_NULL=y
CONFIG_CRYPTO_CRYPTD=y
CONFIG_CRYPTO_AUTHENC=y
CONFIG_CRYPTO_TEST=m

#
# Authenticated Encryption with Associated Data
#
CONFIG_CRYPTO_CCM=y
CONFIG_CRYPTO_GCM=y
CONFIG_CRYPTO_SEQIV=y

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_CTR=y
CONFIG_CRYPTO_CTS=y
CONFIG_CRYPTO_ECB=y
CONFIG_CRYPTO_LRW=y
CONFIG_CRYPTO_PCBC=y
CONFIG_CRYPTO_XTS=y

#
# Hash modes
#
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=y

#
# Digest
#
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_MD4=y
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_MICHAEL_MIC=y
CONFIG_CRYPTO_RMD128=y
CONFIG_CRYPTO_RMD160=y
CONFIG_CRYPTO_RMD256=y
CONFIG_CRYPTO_RMD320=y
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA256=y
CONFIG_CRYPTO_SHA512=y
CONFIG_CRYPTO_TGR192=y
CONFIG_CRYPTO_WP512=y

#
# Ciphers
#
CONFIG_CRYPTO_AES=y
CONFIG_CRYPTO_AES_586=y
CONFIG_CRYPTO_ANUBIS=y
CONFIG_CRYPTO_ARC4=y
CONFIG_CRYPTO_BLOWFISH=y
CONFIG_CRYPTO_CAMELLIA=y
CONFIG_CRYPTO_CAST5=y
CONFIG_CRYPTO_CAST6=y
CONFIG_CRYPTO_DES=y
CONFIG_CRYPTO_FCRYPT=y
CONFIG_CRYPTO_KHAZAD=y
CONFIG_CRYPTO_SALSA20=y
CONFIG_CRYPTO_SALSA20_586=y
CONFIG_CRYPTO_SEED=y
CONFIG_CRYPTO_SERPENT=y
CONFIG_CRYPTO_TEA=y
CONFIG_CRYPTO_TWOFISH=y
CONFIG_CRYPTO_TWOFISH_COMMON=y
CONFIG_CRYPTO_TWOFISH_586=y

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_LZO=y
CONFIG_CRYPTO_HW=y
CONFIG_CRYPTO_DEV_PADLOCK=y
CONFIG_CRYPTO_DEV_PADLOCK_AES=y
CONFIG_CRYPTO_DEV_PADLOCK_SHA=y
CONFIG_CRYPTO_DEV_GEODE=y
CONFIG_CRYPTO_DEV_HIFN_795X=y
CONFIG_CRYPTO_DEV_HIFN_795X_RNG=y
CONFIG_HAVE_KVM=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=y
CONFIG_KVM_INTEL=y
CONFIG_KVM_AMD=y
CONFIG_KVM_TRACE=y
CONFIG_LGUEST=y
CONFIG_VIRTIO=y
CONFIG_VIRTIO_RING=y
CONFIG_VIRTIO_PCI=y
CONFIG_VIRTIO_BALLOON=y

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_GENERIC_FIND_NEXT_BIT=y
CONFIG_CRC_CCITT=y
CONFIG_CRC16=y
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=y
CONFIG_CRC32=y
CONFIG_CRC7=y
CONFIG_LIBCRC32C=y
CONFIG_AUDIT_GENERIC=y
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_TEXTSEARCH=y
CONFIG_TEXTSEARCH_KMP=y
CONFIG_TEXTSEARCH_BM=y
CONFIG_TEXTSEARCH_FSM=y
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_CHECK_SIGNATURE=y
CONFIG_FORCE_SUCCESSFUL_BUILD=y
CONFIG_FORCE_MINIMAL_CONFIG=y
CONFIG_FORCE_MINIMAL_CONFIG_PHYS=y
CONFIG_X86_32_ALWAYS_ON=y

Re: [PATCH 0/6] ftrace: port to the new ring_buffer

[Ingo Molnar]

> -tip testing found that tip/tracing/ring-buffer causes a new lockdep 
> splat:

FYI, triggered on a number of 32-bit test-systems as well - see the log 
below.

	Ingo

[    0.564008] calling  tracer_alloc_buffers+0x0/0x16b @ 1
[    0.574504] ------------[ cut here ]------------
[    0.576002] WARNING: at kernel/lockdep.c:2880 check_flags+0x5a/0x155()
[    0.576002] Modules linked in:
[    0.576002] Pid: 1, comm: swapper Not tainted 2.6.27-rc8-tip-00915-g8cb18a9-dirty #37502
[    0.576002]  [<c01536c4>] warn_on_slowpath+0x46/0x6a
[    0.576002]  [<c0170b14>] ? trace_hardirqs_off+0xb/0xd
[    0.576002]  [<c0173294>] ? __lock_acquire+0xa91/0xaad
[    0.576002]  [<c01a6470>] ? get_page_from_freelist+0x37b/0x455
[    0.576002]  [<c0170044>] ? __raw_spin_is_locked+0x15/0x18
[    0.576002]  [<c0171cf8>] ? find_usage_backwards+0x21/0xe1
[    0.576002]  [<c019f852>] ? time_hardirqs_off+0xe/0x1f
[    0.576002]  [<c0170a66>] ? trace_hardirqs_off_caller+0x15/0xb8
[    0.576002]  [<c0170b14>] ? trace_hardirqs_off+0xb/0xd
[    0.576002]  [<c0120ef0>] ? native_sched_clock+0x83/0x9f
[    0.576002]  [<c0170169>] check_flags+0x5a/0x155
[    0.576002]  [<c01732ec>] lock_acquire+0x3c/0x97
[    0.576002]  [<c14296e9>] _spin_lock+0x23/0x50
[    0.576002]  [<c019bd32>] ? ring_buffer_reset_cpu+0x3f/0x5f
[    0.576002]  [<c019bd32>] ring_buffer_reset_cpu+0x3f/0x5f
[    0.576002]  [<c019e314>] tracing_reset+0xa/0xc
[    0.576002]  [<c01a0b36>] boot_trace_init+0x24/0x3b
[    0.576002]  [<c208577c>] tracer_alloc_buffers+0x137/0x16b
[    0.576002]  [<c010113f>] do_one_initcall+0x57/0x149
[    0.576002]  [<c2085645>] ? tracer_alloc_buffers+0x0/0x16b
[    0.576002]  [<c207bd1c>] ? setup_boot_APIC_clock+0x4b6/0x4cb
[    0.576002]  [<c1421701>] ? print_cpu_info+0x83/0x112
[    0.576002]  [<c2085645>] ? tracer_alloc_buffers+0x0/0x16b
[    0.576002]  [<c206a4c6>] kernel_init+0x54/0x1e2
[    0.576002]  [<c206a472>] ? kernel_init+0x0/0x1e2
[    0.576002]  [<c011cbd3>] kernel_thread_helper+0x7/0x10
[    0.576002]  =======================
[    0.576002] ---[ end trace 4eaa2a86a8e2da22 ]---
[    0.576002] possible reason: unannotated irqs-off.
[    0.576002] irq event stamp: 5283
[    0.576002] hardirqs last  enabled at (5283): [<c0172396>] trace_hardirqs_on+0xb/0xd
[    0.576002] hardirqs last disabled at (5282): [<c0170b14>] trace_hardirqs_off+0xb/0xd
[    0.576002] softirqs last  enabled at (2226): [<c015817d>] __do_softirq+0xe9/0xf1
[    0.576002] softirqs last disabled at (2219): [<c011e206>] do_softirq+0x7e/0xdf
[    0.576017] initcall tracer_alloc_buffers+0x0/0x16b returned 0 after 7 msecs
[    0.580235] lockdep: fixing up alternatives.
[    0.584057] CPU 1 irqstacks, hard=c2299000 soft=c2291000
[    0.588007] Booting processor 1 APIC 0x1 ip 0x6000
[    0.004000] Initializing CPU#1
[    0.004000] masked ExtINT on CPU#1
[    0.004000] Calibrating delay using timer specific routine.. 4020.67 BogoMIPS (lpj=8041348)

Re: [PATCH 0/6] ftrace: port to the new ring_buffer

[Ingo Molnar]

ok, -tip testing found a serious-looking locking bug:

[    4.044005] calling  init_irqsoff_tracer+0x0/0x11 @ 1
[    4.048005] Testing tracer irqsoff: 
[    4.056202] =============================================
[    4.060000] [ INFO: possible recursive locking detected ]
[    4.060000] 2.6.27-rc8-tip-00917-g01214de-dirty #37512
[    4.060000] ---------------------------------------------
[    4.060000] swapper/1 is trying to acquire lock:
[    4.060000]  (&cpu_buffer->lock){++..}, at: [<c015a216>] ring_buffer_lock+0x3b/0x50
[    4.060000] 
[    4.060000] but task is already holding lock:
[    4.060000]  (&cpu_buffer->lock){++..}, at: [<c015a216>] ring_buffer_lock+0x3b/0x50
[    4.060000] 
[    4.060000] other info that might help us debug this:
[    4.060000] 3 locks held by swapper/1:
[    4.060000]  #0:  (trace_types_lock){--..}, at: [<c015d758>] register_tracer+0x2f/0x14f
[    4.060000]  #1:  (max_trace_lock){....}, at: [<c015eab0>] check_critical_timing+0x5d/0x113
[    4.060000]  #2:  (&cpu_buffer->lock){++..}, at: [<c015a216>] ring_buffer_lock+0x3b/0x50
[    4.060000] 
[    4.060000] stack backtrace:
[    4.060000] Pid: 1, comm: swapper Not tainted 2.6.27-rc8-tip-00917-g01214de-dirty #37512
[    4.060000]  [<c014446d>] validate_chain+0x4e9/0xb4c
[    4.060000]  [<c0108b54>] ? native_sched_clock+0xe2/0x101
[    4.060000]  [<c014519a>] __lock_acquire+0x6ca/0x730
[    4.060000]  [<c014525b>] lock_acquire+0x5b/0x81
[    4.060000]  [<c015a216>] ? ring_buffer_lock+0x3b/0x50
[    4.060000]  [<c05908cf>] _spin_lock+0x23/0x50
[    4.060000]  [<c015a216>] ? ring_buffer_lock+0x3b/0x50
[    4.060000]  [<c015a216>] ring_buffer_lock+0x3b/0x50
[    4.060000]  [<c015a2b3>] ring_buffer_reset+0x16/0x46
[    4.060000]  [<c015e16f>] update_max_tr_single+0x65/0xc0
[    4.060000]  [<c015eb15>] check_critical_timing+0xc2/0x113
[    4.060000]  [<c015d270>] ? trace_selftest_startup_irqsoff+0x49/0xac
[    4.060000]  [<c015d270>] ? trace_selftest_startup_irqsoff+0x49/0xac
[    4.060000]  [<c015ec0c>] time_hardirqs_on+0xa6/0xb9
[    4.060000]  [<c014393c>] ? trace_hardirqs_on+0xb/0xd
[    4.060000]  [<c01437fb>] trace_hardirqs_on_caller+0x16/0x14c
[    4.060000]  [<c014393c>] trace_hardirqs_on+0xb/0xd
[    4.060000]  [<c015d270>] trace_selftest_startup_irqsoff+0x49/0xac
[    4.060000]  [<c0128ba9>] ? printk+0x1a/0x1c
[    4.060000]  [<c015d7f1>] register_tracer+0xc8/0x14f
[    4.060000]  [<c08803fc>] init_irqsoff_tracer+0xd/0x11
[    4.060000]  [<c010104f>] do_one_initcall+0x4f/0x130
[    4.060000]  [<c08803ef>] ? init_irqsoff_tracer+0x0/0x11
[    4.060000]  [<c0121390>] ? wake_up_process+0xf/0x11
[    4.060000]  [<c0134ab2>] ? start_workqueue_thread+0x22/0x25
[    4.060000]  [<c0134d99>] ? __create_workqueue_key+0xa9/0x141
[    4.060000]  [<c086c5c3>] kernel_init+0x17b/0x1e2
[    4.060000]  [<c086c448>] ? kernel_init+0x0/0x1e2
[    4.060000]  [<c0104ab3>] kernel_thread_helper+0x7/0x10
[    4.060000]  =======================
[    4.064053] PASSED
[    4.066133] initcall init_irqsoff_tracer+0x0/0x11 returned 0 after 15 msecs
[    4.068005] calling  init_wakeup_tracer+0x0/0xf @ 1

	Ingo

Re: [PATCH 0/6] ftrace: port to the new ring_buffer

[Steven Rostedt]

On Tue, 30 Sep 2008, Ingo Molnar wrote:

> 
> > -tip testing found that tip/tracing/ring-buffer causes a new lockdep 
> > splat:
> 
> FYI, triggered on a number of 32-bit test-systems as well - see the log 
> below.
> 
> 	Ingo
> 
> [    0.564008] calling  tracer_alloc_buffers+0x0/0x16b @ 1
> [    0.574504] ------------[ cut here ]------------
> [    0.576002] WARNING: at kernel/lockdep.c:2880 check_flags+0x5a/0x155()
> [    0.576002] Modules linked in:
> [    0.576002] Pid: 1, comm: swapper Not tainted 2.6.27-rc8-tip-00915-g8cb18a9-dirty #37502
> [    0.576002]  [<c01536c4>] warn_on_slowpath+0x46/0x6a
> [    0.576002]  [<c0170b14>] ? trace_hardirqs_off+0xb/0xd
> [    0.576002]  [<c0173294>] ? __lock_acquire+0xa91/0xaad
> [    0.576002]  [<c01a6470>] ? get_page_from_freelist+0x37b/0x455
> [    0.576002]  [<c0170044>] ? __raw_spin_is_locked+0x15/0x18
> [    0.576002]  [<c0171cf8>] ? find_usage_backwards+0x21/0xe1
> [    0.576002]  [<c019f852>] ? time_hardirqs_off+0xe/0x1f
> [    0.576002]  [<c0170a66>] ? trace_hardirqs_off_caller+0x15/0xb8
> [    0.576002]  [<c0170b14>] ? trace_hardirqs_off+0xb/0xd

Again, I think this is the same issue with the raws?

-- Steve

Re: [PATCH 0/6] ftrace: port to the new ring_buffer

[Steven Rostedt]

On Tue, 30 Sep 2008, Ingo Molnar wrote:

> 
> * Ingo Molnar <mingo@elte.hu> wrote:
> 
> > very nice! I'd expect breakages and complications too so i 
> > restructured tip/tracing/* a bit: firstly i created a tip/tracing/core 
> > append-only merge branch which collects all the known-robust bits. 
> > Then i created a new branch for your new generic ring-buffer feature: 
> > tip/tracing/ring-buffer, and applied your patches. I've started 
> > testing it.
> 
> -tip testing found that tip/tracing/ring-buffer causes a new lockdep 
> splat:
> 
> [    0.000000] Linux version 2.6.27-rc8-tip-00915-g8cb18a9-dirty (mingo@dione)
>                (gcc version 4.2.3) #37501 SMP Tue Sep 30 10:10:10 CEST 2008
> [...]
> [    0.268001] calling  tracer_alloc_buffers+0x0/0x1e5 @ 1
> [    0.270983] ------------[ cut here ]------------
> [    0.271100] WARNING: at kernel/lockdep.c:2880 check_flags+0x63/0x179()
> [    0.271219] Modules linked in:
> [    0.271356] Pid: 1, comm: swapper Not tainted 2.6.27-rc8-tip-00915-g8cb18a9-dirty #37501
> [    0.271563] Call Trace:
> [    0.271678]  [<ffffffff80271d2b>] warn_on_slowpath+0x5d/0x84
> [    0.271797]  [<ffffffff80295973>] ? __lock_acquire+0xba4/0xbc5
> [    0.271916]  [<ffffffff8029266d>] ? __raw_spin_is_locked+0x17/0x1a
> [    0.272001]  [<ffffffff802929cc>] ? graph_unlock+0x79/0x7e
> [    0.272001]  [<ffffffff8029449f>] ? mark_lock+0x1c/0x361
> [    0.272001]  [<ffffffff8029483a>] ? mark_held_locks+0x56/0x71
> [    0.272001]  [<ffffffff802cbb77>] ? time_hardirqs_off+0x12/0x26
> [    0.272001]  [<ffffffff802934f1>] ? trace_hardirqs_off_caller+0x21/0xc2

I don't even need to look at the configs. There's places I still used the 
"raw_local_irq_save" and that is what in the past has caused this issue.
I'll go and remove those.

-- Steve