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From: Jiri Olsa <jolsa@redhat.com>
To: rostedt@goodmis.org, fweisbec@gmail.com, mingo@redhat.com,
	paulus@samba.org, acme@ghostprotocols.net,
	a.p.zijlstra@chello.nl
Cc: linux-kernel@vger.kernel.org, aarapov@redhat.com,
	Jiri Olsa <jolsa@redhat.com>
Subject: [PATCH 5/7] ftrace, perf: Add support to use function tracepoint in perf
Date: Wed, 18 Jan 2012 19:44:33 +0100	[thread overview]
Message-ID: <1326912275-26405-6-git-send-email-jolsa@redhat.com> (raw)
In-Reply-To: <1326912275-26405-1-git-send-email-jolsa@redhat.com>

Adding perf registration support for the ftrace function event,
so it is now possible to register it via perf interface.

The perf_event struct statically contains ftrace_ops as a handle
for function tracer. The function tracer is registered/unregistered
in open/close actions.

To be efficient, we enable/disable ftrace_ops each time the traced
process is scheduled in/out (via TRACE_REG_PERF_(ADD|DELL) handlers).
This way tracing is enabled only when the process is running.
Intentionally using this way instead of the event's hw state
PERF_HES_STOPPED, which would not disable the ftrace_ops.

It is now possible to use function trace within perf commands
like:

  perf record -e ftrace:function ls
  perf stat -e ftrace:function ls

Allowed only for root.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
---
 include/linux/perf_event.h      |    3 +
 kernel/trace/trace.h            |    2 +
 kernel/trace/trace_event_perf.c |   92 +++++++++++++++++++++++++++++++++++++++
 kernel/trace/trace_export.c     |   28 ++++++++++++
 4 files changed, 125 insertions(+), 0 deletions(-)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 0b91db2..5003be6 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -858,6 +858,9 @@ struct perf_event {
 #ifdef CONFIG_EVENT_TRACING
 	struct ftrace_event_call	*tp_event;
 	struct event_filter		*filter;
+#ifdef CONFIG_FUNCTION_TRACER
+	struct ftrace_ops               ftrace_ops;
+#endif
 #endif
 
 #ifdef CONFIG_CGROUP_PERF
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 85732a8..e88e58a 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -591,6 +591,8 @@ static inline int ftrace_trace_task(struct task_struct *task)
 static inline int ftrace_is_dead(void) { return 0; }
 #endif
 
+int ftrace_event_is_function(struct ftrace_event_call *call);
+
 /*
  * struct trace_parser - servers for reading the user input separated by spaces
  * @cont: set if the input is not complete - no final space char was found
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c
index d72af0b..57eb232 100644
--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -24,6 +24,11 @@ static int	total_ref_count;
 static int perf_trace_event_perm(struct ftrace_event_call *tp_event,
 				 struct perf_event *p_event)
 {
+	/* The ftrace function trace is allowed only for root. */
+	if (ftrace_event_is_function(tp_event) &&
+	    perf_paranoid_kernel() && !capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
 	/* No tracing, just counting, so no obvious leak */
 	if (!(p_event->attr.sample_type & PERF_SAMPLE_RAW))
 		return 0;
@@ -250,3 +255,90 @@ __kprobes void *perf_trace_buf_prepare(int size, unsigned short type,
 	return raw_data;
 }
 EXPORT_SYMBOL_GPL(perf_trace_buf_prepare);
+
+
+static void
+perf_ftrace_function_call(unsigned long ip, unsigned long parent_ip)
+{
+	struct ftrace_entry *entry;
+	struct hlist_head *head;
+	struct pt_regs regs;
+	int rctx;
+
+#define ENTRY_SIZE (ALIGN(sizeof(struct ftrace_entry) + sizeof(u32), \
+		    sizeof(u64)) - sizeof(u32))
+
+	BUILD_BUG_ON(ENTRY_SIZE > PERF_MAX_TRACE_SIZE);
+
+	perf_fetch_caller_regs(&regs);
+
+	entry = perf_trace_buf_prepare(ENTRY_SIZE, TRACE_FN, NULL, &rctx);
+	if (!entry)
+		return;
+
+	entry->ip = ip;
+	entry->parent_ip = parent_ip;
+
+	head = this_cpu_ptr(event_function.perf_events);
+	perf_trace_buf_submit(entry, ENTRY_SIZE, rctx, 0,
+			      1, &regs, head);
+
+#undef ENTRY_SIZE
+}
+
+static int perf_ftrace_function_register(struct perf_event *event)
+{
+	struct ftrace_ops *ops = &event->ftrace_ops;
+
+	ops->flags |= FTRACE_OPS_FL_CONTROL;
+	ops->func = perf_ftrace_function_call;
+	return register_ftrace_function(ops);
+}
+
+static int perf_ftrace_function_unregister(struct perf_event *event)
+{
+	struct ftrace_ops *ops = &event->ftrace_ops;
+	return unregister_ftrace_function(ops);
+}
+
+static void perf_ftrace_function_enable(struct perf_event *event)
+{
+	struct ftrace_ops *ops = &event->ftrace_ops;
+	ftrace_function_enable(ops, smp_processor_id());
+}
+
+static void perf_ftrace_function_disable(struct perf_event *event)
+{
+	struct ftrace_ops *ops = &event->ftrace_ops;
+	ftrace_function_disable(ops, smp_processor_id());
+}
+
+int perf_ftrace_event_register(struct ftrace_event_call *call,
+			       enum trace_reg type, void *data)
+{
+	int etype = call->event.type;
+
+	if (etype != TRACE_FN)
+		return -EINVAL;
+
+	switch (type) {
+	case TRACE_REG_REGISTER:
+	case TRACE_REG_UNREGISTER:
+		break;
+	case TRACE_REG_PERF_REGISTER:
+	case TRACE_REG_PERF_UNREGISTER:
+		return 0;
+	case TRACE_REG_PERF_OPEN:
+		return perf_ftrace_function_register(data);
+	case TRACE_REG_PERF_CLOSE:
+		return perf_ftrace_function_unregister(data);
+	case TRACE_REG_PERF_ADD:
+		perf_ftrace_function_enable(data);
+		return 0;
+	case TRACE_REG_PERF_DEL:
+		perf_ftrace_function_disable(data);
+		return 0;
+	}
+
+	return -EINVAL;
+}
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index bbeec31..867653c 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -131,6 +131,28 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call)	\
 
 #include "trace_entries.h"
 
+static int ftrace_event_class_register(struct ftrace_event_call *call,
+				       enum trace_reg type, void *data)
+{
+	switch (type) {
+	case TRACE_REG_PERF_REGISTER:
+	case TRACE_REG_PERF_UNREGISTER:
+		return 0;
+	case TRACE_REG_PERF_OPEN:
+	case TRACE_REG_PERF_CLOSE:
+	case TRACE_REG_PERF_ADD:
+	case TRACE_REG_PERF_DEL:
+#ifdef CONFIG_PERF_EVENTS
+		return perf_ftrace_event_register(call, type, data);
+#endif
+	case TRACE_REG_REGISTER:
+	case TRACE_REG_UNREGISTER:
+		break;
+	}
+
+	return -EINVAL;
+}
+
 #undef __entry
 #define __entry REC
 
@@ -159,6 +181,7 @@ struct ftrace_event_class event_class_ftrace_##call = {			\
 	.system			= __stringify(TRACE_SYSTEM),		\
 	.define_fields		= ftrace_define_fields_##call,		\
 	.fields			= LIST_HEAD_INIT(event_class_ftrace_##call.fields),\
+	.reg			= ftrace_event_class_register,		\
 };									\
 									\
 struct ftrace_event_call __used event_##call = {			\
@@ -170,4 +193,9 @@ struct ftrace_event_call __used event_##call = {			\
 struct ftrace_event_call __used						\
 __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call;
 
+int ftrace_event_is_function(struct ftrace_event_call *call)
+{
+	return call == &event_function;
+}
+
 #include "trace_entries.h"
-- 
1.7.1


  parent reply	other threads:[~2012-01-18 18:45 UTC|newest]

Thread overview: 187+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-27 18:04 [RFC] ftrace, perf: Adding support to use function trace Jiri Olsa
2011-11-27 18:04 ` [PATCH 1/9] trace: Fix uninitialized variable compiler warning Jiri Olsa
2011-11-28 16:19   ` Steven Rostedt
2011-11-28 16:25     ` Jiri Olsa
2011-11-28 19:34       ` Steven Rostedt
2011-11-27 18:04 ` [PATCH 2/9] ftrace: Fix possible NULL dereferencing in __ftrace_hash_rec_update Jiri Olsa
2011-11-28 16:24   ` Steven Rostedt
2011-11-27 18:04 ` [PATCH 3/9] ftrace: Fix shutdown to disable calls properly Jiri Olsa
2011-11-28 19:18   ` Steven Rostedt
2011-11-29 11:21     ` Jiri Olsa
2011-11-27 18:04 ` [PATCH 4/9] ftrace: Add enable/disable ftrace_ops control interface Jiri Olsa
2011-11-28 19:26   ` Steven Rostedt
2011-11-28 20:02     ` Peter Zijlstra
2011-11-28 20:05       ` Peter Zijlstra
2011-11-28 20:14         ` Steven Rostedt
2011-11-28 20:20           ` Peter Zijlstra
2011-11-28 20:12       ` Steven Rostedt
2011-11-28 20:15         ` Peter Zijlstra
2011-11-28 20:24           ` Steven Rostedt
2011-11-28 20:21   ` Steven Rostedt
2011-11-29 10:07     ` Jiri Olsa
2011-11-27 18:04 ` [PATCH 5/9] ftrace, perf: Add open/close tracepoint perf registration actions Jiri Olsa
2011-11-27 18:04 ` [PATCH 6/9] ftrace, perf: Add add/del " Jiri Olsa
2011-11-27 18:04 ` [PATCH 7/9] ftrace, perf: Add support to use function tracepoint in perf Jiri Olsa
2011-11-28 19:58   ` Steven Rostedt
2011-11-28 20:03     ` Peter Zijlstra
2011-11-28 20:13       ` Steven Rostedt
2011-11-29 10:10         ` Jiri Olsa
2011-11-28 20:08     ` Peter Zijlstra
2011-11-28 20:10       ` Peter Zijlstra
2011-11-28 20:16         ` Steven Rostedt
2011-11-28 20:18           ` Peter Zijlstra
2011-11-27 18:04 ` [PATCH 8/9] ftrace, perf: Add FILTER_TRACE_FN event field type Jiri Olsa
2011-11-28 20:01   ` Steven Rostedt
2011-11-29 10:14     ` Jiri Olsa
2011-11-29 11:22     ` Jiri Olsa
2011-11-29 11:51       ` Peter Zijlstra
2011-11-29 12:21         ` Jiri Olsa
2011-11-27 18:04 ` [PATCH 9/9] ftrace, perf: Add filter support for function trace event Jiri Olsa
2011-11-28 20:07   ` Steven Rostedt
2011-12-05 17:22 ` [RFCv2] ftrace, perf: Adding support to use function trace Jiri Olsa
2011-12-05 17:22   ` [PATCHv2 01/10] ftrace: Fix possible NULL dereferencing in __ftrace_hash_rec_update Jiri Olsa
2011-12-05 17:22   ` [PATCHv2 02/10] ftrace: Change mcount call replacement logic Jiri Olsa
2011-12-19 19:03     ` Steven Rostedt
2011-12-20 13:10       ` Jiri Olsa
2011-12-20 16:33         ` Steven Rostedt
2011-12-20 19:39     ` Steven Rostedt
2011-12-21  9:57       ` Jiri Olsa
2011-12-21 11:34         ` Steven Rostedt
2011-12-21 11:35           ` Steven Rostedt
2011-12-21 11:40             ` Jiri Olsa
2012-01-08  9:13     ` [tip:perf/core] ftrace: Fix unregister ftrace_ops accounting tip-bot for Jiri Olsa
2011-12-05 17:22   ` [PATCHv2 03/10] ftrace: Add enable/disable ftrace_ops control interface Jiri Olsa
2011-12-19 19:19     ` Steven Rostedt
2011-12-19 19:35     ` Steven Rostedt
2011-12-20 14:57       ` Jiri Olsa
2011-12-20 15:25         ` Steven Rostedt
2011-12-20 15:35           ` Jiri Olsa
2011-12-05 17:22   ` [PATCHv2 04/10] ftrace, perf: Add open/close tracepoint perf registration actions Jiri Olsa
2011-12-05 17:22   ` [PATCHv2 05/10] ftrace, perf: Add add/del " Jiri Olsa
2011-12-05 17:22   ` [PATCHv2 06/10] ftrace, perf: Add support to use function tracepoint in perf Jiri Olsa
2011-12-05 17:22   ` [PATCHv2 07/10] ftrace: Change filter/notrace set functions to return exit code Jiri Olsa
2011-12-19 19:22     ` Steven Rostedt
2011-12-05 17:22   ` [PATCHv2 08/10] ftrace, perf: Distinguish ftrace function event field type Jiri Olsa
2011-12-05 17:22   ` [PATCHv2 09/10] ftrace, perf: Add filter support for function trace event Jiri Olsa
2011-12-05 17:22   ` [PATCHv2 10/10] ftrace, graph: Add global_ops filter callback for graph tracing Jiri Olsa
2011-12-19 19:27     ` Steven Rostedt
2011-12-19 13:40   ` [RFCv2] ftrace, perf: Adding support to use function trace Jiri Olsa
2011-12-19 16:45     ` Steven Rostedt
2011-12-19 16:58     ` Frederic Weisbecker
2011-12-21 11:48   ` [PATCHv3 0/8] " Jiri Olsa
2011-12-21 11:48     ` [PATCH 1/8] ftrace: Change filter/notrace set functions to return exit code Jiri Olsa
2011-12-21 11:48     ` [PATCH 2/8] ftrace: Fix possible NULL dereferencing in __ftrace_hash_rec_update Jiri Olsa
2011-12-21 15:23       ` Steven Rostedt
2011-12-21 11:48     ` [PATCH 3/8] ftrace: Add enable/disable ftrace_ops control interface Jiri Olsa
2011-12-21 16:01       ` Steven Rostedt
2011-12-21 16:43         ` Jiri Olsa
2011-12-21 16:55           ` Steven Rostedt
2012-01-24  1:26         ` Frederic Weisbecker
2011-12-21 11:48     ` [PATCH 4/8] ftrace, perf: Add open/close tracepoint perf registration actions Jiri Olsa
2011-12-21 11:48     ` [PATCH 5/8] ftrace, perf: Add add/del " Jiri Olsa
2011-12-21 11:48     ` [PATCH 6/8] ftrace, perf: Add support to use function tracepoint in perf Jiri Olsa
2011-12-21 11:48     ` [PATCH 7/8] ftrace, perf: Distinguish ftrace function event field type Jiri Olsa
2011-12-21 11:48     ` [PATCH 8/8] ftrace, perf: Add filter support for function trace event Jiri Olsa
2011-12-21 18:56     ` [PATCHv4 0/8] ftrace, perf: Adding support to use function trace Jiri Olsa
2011-12-21 18:56       ` [PATCH 1/7] ftrace: Change filter/notrace set functions to return exit code Jiri Olsa
2011-12-22  0:12         ` Steven Rostedt
2011-12-22  8:01           ` [PATCHv5 " Jiri Olsa
2011-12-21 18:56       ` [PATCH 2/7] ftrace: Add enable/disable ftrace_ops control interface Jiri Olsa
2011-12-21 18:56       ` [PATCH 3/7] ftrace, perf: Add open/close tracepoint perf registration actions Jiri Olsa
2011-12-21 18:56       ` [PATCH 4/7] ftrace, perf: Add add/del " Jiri Olsa
2011-12-21 18:56       ` [PATCH 5/7] ftrace, perf: Add support to use function tracepoint in perf Jiri Olsa
2011-12-21 18:56       ` [PATCH 6/7] ftrace, perf: Distinguish ftrace function event field type Jiri Olsa
2011-12-21 18:56       ` [PATCH 7/7] ftrace, perf: Add filter support for function trace event Jiri Olsa
2011-12-21 22:07         ` Frederic Weisbecker
2011-12-22 12:55           ` Jiri Olsa
2011-12-22 15:26             ` [PATCHvFIXED " Jiri Olsa
2011-12-24  2:35               ` Frederic Weisbecker
2011-12-21 19:02       ` [PATCHv4 0/7] ftrace, perf: Adding support to use function trace Jiri Olsa
2012-01-02  9:04       ` [PATCHv5 " Jiri Olsa
2012-01-02  9:04         ` [PATCH 1/7] ftrace: Change filter/notrace set functions to return exit code Jiri Olsa
2012-02-17 13:46           ` [tip:perf/core] ftrace: Change filter/ notrace " tip-bot for Jiri Olsa
2012-01-02  9:04         ` [PATCH 2/7] ftrace: Add enable/disable ftrace_ops control interface Jiri Olsa
2012-01-17  1:42           ` Frederic Weisbecker
2012-01-17  2:07             ` Steven Rostedt
2012-01-17  2:29               ` Frederic Weisbecker
2012-01-18 13:59             ` Jiri Olsa
2012-01-02  9:04         ` [PATCH 3/7] ftrace, perf: Add open/close tracepoint perf registration actions Jiri Olsa
2012-01-02  9:04         ` [PATCH 4/7] ftrace, perf: Add add/del " Jiri Olsa
2012-01-02  9:04         ` [PATCH 5/7] ftrace, perf: Add support to use function tracepoint in perf Jiri Olsa
2012-01-02  9:04         ` [PATCH 6/7] ftrace, perf: Distinguish ftrace function event field type Jiri Olsa
2012-01-02  9:04         ` [PATCH 7/7] ftrace, perf: Add filter support for function trace event Jiri Olsa
2012-01-16 23:59           ` Steven Rostedt
2012-01-18 13:45             ` Jiri Olsa
2012-01-16  8:57         ` [PATCHv5 0/7] ftrace, perf: Adding support to use function trace Jiri Olsa
2012-01-16 16:17           ` Steven Rostedt
2012-01-18 18:44         ` [PATCHv6 " Jiri Olsa
2012-01-18 18:44           ` [PATCH 1/7] ftrace: Change filter/notrace set functions to return exit code Jiri Olsa
2012-01-19 16:31             ` Frederic Weisbecker
2012-01-18 18:44           ` [PATCH 2/7] ftrace: Add enable/disable ftrace_ops control interface Jiri Olsa
2012-01-20 17:02             ` Frederic Weisbecker
2012-01-25 23:13               ` Steven Rostedt
2012-01-26  2:37                 ` Frederic Weisbecker
2012-01-27 10:37                   ` Jiri Olsa
2012-01-27 10:38                     ` Jiri Olsa
2012-01-27 16:40                     ` Frederic Weisbecker
2012-01-27 16:54                       ` Jiri Olsa
2012-01-27 17:02                         ` Frederic Weisbecker
2012-01-27 17:20                           ` Jiri Olsa
2012-01-28 16:39                             ` Frederic Weisbecker
2012-01-27 17:21                         ` Steven Rostedt
2012-01-18 18:44           ` [PATCH 3/7] ftrace, perf: Add open/close tracepoint perf registration actions Jiri Olsa
2012-01-18 18:44           ` [PATCH 4/7] ftrace, perf: Add add/del " Jiri Olsa
2012-01-18 18:44           ` Jiri Olsa [this message]
2012-01-18 18:44           ` [PATCH 6/7] ftrace, perf: Distinguish ftrace function event field type Jiri Olsa
2012-01-18 18:44           ` [PATCH 7/7] ftrace, perf: Add filter support for function trace event Jiri Olsa
2012-01-18 21:43           ` [PATCHv6 0/7] ftrace, perf: Adding support to use function trace Steven Rostedt
2012-01-28 18:43           ` [PATCHv7 " Jiri Olsa
2012-01-28 18:43             ` [PATCH 1/7] ftrace: Change filter/notrace set functions to return exit code Jiri Olsa
2012-01-30  5:42               ` Frederic Weisbecker
2012-01-28 18:43             ` [PATCH 2/7] ftrace: Add enable/disable ftrace_ops control interface Jiri Olsa
2012-01-30  5:59               ` Frederic Weisbecker
2012-01-30  9:18                 ` Jiri Olsa
2012-02-03 13:42                   ` Steven Rostedt
2012-02-03 13:50                     ` Jiri Olsa
2012-02-03 14:08                       ` Steven Rostedt
2012-02-03 14:22                         ` [PATCHv8 0/2] first 2 patches passed review Jiri Olsa
2012-02-03 14:22                           ` [PATCH 1/2] ftrace: Change filter/notrace set functions to return exit code Jiri Olsa
2012-02-03 14:22                           ` [PATCH 2/2] ftrace: Add enable/disable ftrace_ops control interface Jiri Olsa
2012-02-04 13:24                           ` [PATCHv8 0/2] first 2 patches passed review Frederic Weisbecker
2012-02-03 13:40               ` [PATCH 2/7] ftrace: Add enable/disable ftrace_ops control interface Steven Rostedt
2012-01-28 18:43             ` [PATCH 3/7] ftrace, perf: Add open/close tracepoint perf registration actions Jiri Olsa
2012-02-02 17:35               ` Frederic Weisbecker
2012-02-03 10:23                 ` Jiri Olsa
2012-01-28 18:43             ` [PATCH 4/7] ftrace, perf: Add add/del " Jiri Olsa
2012-02-02 17:42               ` Frederic Weisbecker
2012-01-28 18:43             ` [PATCH 5/7] ftrace, perf: Add support to use function tracepoint in perf Jiri Olsa
2012-02-02 18:14               ` Frederic Weisbecker
2012-02-03 12:54                 ` Jiri Olsa
2012-02-03 13:00                   ` Jiri Olsa
2012-02-03 14:07                     ` Steven Rostedt
2012-02-04 13:21                   ` Frederic Weisbecker
2012-02-06 19:35                     ` Steven Rostedt
2012-02-03 13:53                 ` Steven Rostedt
2012-01-28 18:43             ` [PATCH 6/7] ftrace, perf: Distinguish ftrace function event field type Jiri Olsa
2012-02-03 14:16               ` Steven Rostedt
2012-01-28 18:43             ` [PATCH 7/7] ftrace, perf: Add filter support for function trace event Jiri Olsa
2012-02-07  0:20               ` Jiri Olsa
2012-02-07 19:44             ` [PATCHv8 0/8] ftrace, perf: Adding support to use function trace Jiri Olsa
2012-02-07 19:44               ` [PATCH 1/8] ftrace: Change filter/notrace set functions to return exit code Jiri Olsa
2012-02-07 19:44               ` [PATCH 2/8] ftrace: Add enable/disable ftrace_ops control interface Jiri Olsa
2012-02-07 19:44               ` [PATCH 3/8] ftrace, perf: Add open/close tracepoint perf registration actions Jiri Olsa
2012-02-07 19:44               ` [PATCH 4/8] ftrace, perf: Add add/del " Jiri Olsa
2012-02-07 19:44               ` [PATCH 5/8] ftrace: Add FTRACE_ENTRY_REG macro to allow event registration Jiri Olsa
2012-02-07 19:44               ` [PATCH 6/8] ftrace, perf: Add support to use function tracepoint in perf Jiri Olsa
2012-02-07 19:44               ` [PATCH 7/8] ftrace: Allow to specify filter field type for ftrace events Jiri Olsa
2012-02-07 19:44               ` [PATCH 8/8] ftrace, perf: Add filter support for function trace event Jiri Olsa
2012-02-10 13:27               ` [PATCHv8 0/8] ftrace, perf: Adding support to use function trace Steven Rostedt
2012-02-10 14:45                 ` Steven Rostedt
2012-02-10 16:07                   ` Jiri Olsa
2012-02-10 16:48                     ` Frederic Weisbecker
2012-02-10 18:00                       ` Steven Rostedt
2012-02-10 18:05                         ` Frederic Weisbecker
2012-02-10 18:23                           ` David Ahern
2012-02-13 18:02               ` Steven Rostedt
2012-02-15 14:51 [PATCHv9 0/7] " Jiri Olsa
2012-02-15 14:51 ` [PATCH 5/7] ftrace, perf: Add support to use function tracepoint in perf Jiri Olsa
2012-02-15 16:03   ` Frederic Weisbecker

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