From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, colin.king@canonical.com,
dmtrmonakhov@yandex-team.ru, gregkh@linuxfoundation.org,
keescook@chromium.org, khlebnikov@yandex-team.ru,
linux-mm@kvack.org, linux@roeck-us.net,
mm-commits@vger.kernel.org, peterz@infradead.org,
pmladek@suse.com, rostedt@goodmis.org, sashal@kernel.org,
sergey.senozhatsky@gmail.com, torvalds@linux-foundation.org
Subject: [patch 108/166] lib/test_lockup: test module to generate lockups
Date: Mon, 06 Apr 2020 20:09:47 -0700 [thread overview]
Message-ID: <20200407030947.TX1NNK6nu%akpm@linux-foundation.org> (raw)
In-Reply-To: <20200406200254.a69ebd9e08c4074e41ddebaf@linux-foundation.org>
From: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Subject: lib/test_lockup: test module to generate lockups
CONFIG_TEST_LOCKUP=m adds module "test_lockup" that helps to make sure
that watchdogs and lockup detectors are working properly.
Depending on module parameters test_lockup could emulate soft or hard
lockup, "hung task", hold arbitrary lock, allocate bunch of pages.
Also it could generate series of lockups with cooling-down periods, in
this way it could be used as "ping" for locks or page allocator. Loop
checks signals between iteration thus could be stopped by ^C.
# modinfo test_lockup
...
parm: time_secs:lockup time in seconds, default 0 (uint)
parm: time_nsecs:nanoseconds part of lockup time, default 0 (uint)
parm: cooldown_secs:cooldown time between iterations in seconds, default 0 (uint)
parm: cooldown_nsecs:nanoseconds part of cooldown, default 0 (uint)
parm: iterations:lockup iterations, default 1 (uint)
parm: all_cpus:trigger lockup at all cpus at once (bool)
parm: state:wait in 'R' running (default), 'D' uninterruptible, 'K' killable, 'S' interruptible state (charp)
parm: use_hrtimer:use high-resolution timer for sleeping (bool)
parm: iowait:account sleep time as iowait (bool)
parm: lock_read:lock read-write locks for read (bool)
parm: lock_single:acquire locks only at one cpu (bool)
parm: reacquire_locks:release and reacquire locks/irq/preempt between iterations (bool)
parm: touch_softlockup:touch soft-lockup watchdog between iterations (bool)
parm: touch_hardlockup:touch hard-lockup watchdog between iterations (bool)
parm: call_cond_resched:call cond_resched() between iterations (bool)
parm: measure_lock_wait:measure lock wait time (bool)
parm: lock_wait_threshold:print lock wait time longer than this in nanoseconds, default off (ulong)
parm: disable_irq:disable interrupts: generate hard-lockups (bool)
parm: disable_softirq:disable bottom-half irq handlers (bool)
parm: disable_preempt:disable preemption: generate soft-lockups (bool)
parm: lock_rcu:grab rcu_read_lock: generate rcu stalls (bool)
parm: lock_mmap_sem:lock mm->mmap_sem: block procfs interfaces (bool)
parm: lock_rwsem_ptr:lock rw_semaphore at address (ulong)
parm: lock_mutex_ptr:lock mutex at address (ulong)
parm: lock_spinlock_ptr:lock spinlock at address (ulong)
parm: lock_rwlock_ptr:lock rwlock at address (ulong)
parm: alloc_pages_nr:allocate and free pages under locks (uint)
parm: alloc_pages_order:page order to allocate (uint)
parm: alloc_pages_gfp:allocate pages with this gfp_mask, default GFP_KERNEL (uint)
parm: alloc_pages_atomic:allocate pages with GFP_ATOMIC (bool)
parm: reallocate_pages:free and allocate pages between iterations (bool)
Parameters for locking by address are unsafe and taints kernel. With
CONFIG_DEBUG_SPINLOCK=y they at least check magics for embedded spinlocks.
Examples:
task hang in D-state:
modprobe test_lockup time_secs=1 iterations=60 state=D
task hang in io-wait D-state:
modprobe test_lockup time_secs=1 iterations=60 state=D iowait
softlockup:
modprobe test_lockup time_secs=1 iterations=60 state=R
hardlockup:
modprobe test_lockup time_secs=1 iterations=60 state=R disable_irq
system-wide hardlockup:
modprobe test_lockup time_secs=1 iterations=60 state=R \
disable_irq all_cpus
rcu stall:
modprobe test_lockup time_secs=1 iterations=60 state=R \
lock_rcu touch_softlockup
lock mmap_sem / block procfs interfaces:
modprobe test_lockup time_secs=1 iterations=60 state=S lock_mmap_sem
lock tasklist_lock for read / block forks:
TASKLIST_LOCK=$(awk '$3 == "tasklist_lock" {print "0x"$1}' /proc/kallsyms)
modprobe test_lockup time_secs=1 iterations=60 state=R \
disable_irq lock_read lock_rwlock_ptr=$TASKLIST_LOCK
lock namespace_sem / block vfs mount operations:
NAMESPACE_SEM=$(awk '$3 == "namespace_sem" {print "0x"$1}' /proc/kallsyms)
modprobe test_lockup time_secs=1 iterations=60 state=S \
lock_rwsem_ptr=$NAMESPACE_SEM
lock cgroup mutex / block cgroup operations:
CGROUP_MUTEX=$(awk '$3 == "cgroup_mutex" {print "0x"$1}' /proc/kallsyms)
modprobe test_lockup time_secs=1 iterations=60 state=S \
lock_mutex_ptr=$CGROUP_MUTEX
ping cgroup_mutex every second and measure maximum lock wait time:
modprobe test_lockup cooldown_secs=1 iterations=60 state=S \
lock_mutex_ptr=$CGROUP_MUTEX reacquire_locks measure_lock_wait
[linux@roeck-us.net: rename disable_irq to fix build error]
Link: http://lkml.kernel.org/r/20200317133614.23152-1-linux@roeck-us.net
Link: http://lkml.kernel.org/r/158132859146.2797.525923171323227836.stgit@buzz
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
lib/Kconfig.debug | 12
lib/Makefile | 1
lib/test_lockup.c | 554 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 567 insertions(+)
--- a/lib/Kconfig.debug~lib-test_lockup-test-module-to-generate-lockups
+++ a/lib/Kconfig.debug
@@ -976,6 +976,18 @@ config WQ_WATCHDOG
state. This can be configured through kernel parameter
"workqueue.watchdog_thresh" and its sysfs counterpart.
+config TEST_LOCKUP
+ tristate "Test module to generate lockups"
+ help
+ This builds the "test_lockup" module that helps to make sure
+ that watchdogs and lockup detectors are working properly.
+
+ Depending on module parameters it could emulate soft or hard
+ lockup, "hung task", or locking arbitrary lock for a long time.
+ Also it could generate series of lockups with cooling-down periods.
+
+ If unsure, say N.
+
endmenu # "Debug lockups and hangs"
menu "Scheduler Debugging"
--- a/lib/Makefile~lib-test_lockup-test-module-to-generate-lockups
+++ a/lib/Makefile
@@ -90,6 +90,7 @@ obj-$(CONFIG_TEST_OBJAGG) += test_objagg
obj-$(CONFIG_TEST_STACKINIT) += test_stackinit.o
obj-$(CONFIG_TEST_BLACKHOLE_DEV) += test_blackhole_dev.o
obj-$(CONFIG_TEST_MEMINIT) += test_meminit.o
+obj-$(CONFIG_TEST_LOCKUP) += test_lockup.o
obj-$(CONFIG_TEST_LIVEPATCH) += livepatch/
--- /dev/null
+++ a/lib/test_lockup.c
@@ -0,0 +1,554 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Test module to generate lockups
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/sched/signal.h>
+#include <linux/sched/clock.h>
+#include <linux/cpu.h>
+#include <linux/nmi.h>
+#include <linux/mm.h>
+#include <linux/uaccess.h>
+
+static unsigned int time_secs;
+module_param(time_secs, uint, 0600);
+MODULE_PARM_DESC(time_secs, "lockup time in seconds, default 0");
+
+static unsigned int time_nsecs;
+module_param(time_nsecs, uint, 0600);
+MODULE_PARM_DESC(time_nsecs, "nanoseconds part of lockup time, default 0");
+
+static unsigned int cooldown_secs;
+module_param(cooldown_secs, uint, 0600);
+MODULE_PARM_DESC(cooldown_secs, "cooldown time between iterations in seconds, default 0");
+
+static unsigned int cooldown_nsecs;
+module_param(cooldown_nsecs, uint, 0600);
+MODULE_PARM_DESC(cooldown_nsecs, "nanoseconds part of cooldown, default 0");
+
+static unsigned int iterations = 1;
+module_param(iterations, uint, 0600);
+MODULE_PARM_DESC(iterations, "lockup iterations, default 1");
+
+static bool all_cpus;
+module_param(all_cpus, bool, 0400);
+MODULE_PARM_DESC(all_cpus, "trigger lockup at all cpus at once");
+
+static int wait_state;
+static char *state = "R";
+module_param(state, charp, 0400);
+MODULE_PARM_DESC(state, "wait in 'R' running (default), 'D' uninterruptible, 'K' killable, 'S' interruptible state");
+
+static bool use_hrtimer;
+module_param(use_hrtimer, bool, 0400);
+MODULE_PARM_DESC(use_hrtimer, "use high-resolution timer for sleeping");
+
+static bool iowait;
+module_param(iowait, bool, 0400);
+MODULE_PARM_DESC(iowait, "account sleep time as iowait");
+
+static bool lock_read;
+module_param(lock_read, bool, 0400);
+MODULE_PARM_DESC(lock_read, "lock read-write locks for read");
+
+static bool lock_single;
+module_param(lock_single, bool, 0400);
+MODULE_PARM_DESC(lock_single, "acquire locks only at one cpu");
+
+static bool reacquire_locks;
+module_param(reacquire_locks, bool, 0400);
+MODULE_PARM_DESC(reacquire_locks, "release and reacquire locks/irq/preempt between iterations");
+
+static bool touch_softlockup;
+module_param(touch_softlockup, bool, 0600);
+MODULE_PARM_DESC(touch_softlockup, "touch soft-lockup watchdog between iterations");
+
+static bool touch_hardlockup;
+module_param(touch_hardlockup, bool, 0600);
+MODULE_PARM_DESC(touch_hardlockup, "touch hard-lockup watchdog between iterations");
+
+static bool call_cond_resched;
+module_param(call_cond_resched, bool, 0600);
+MODULE_PARM_DESC(call_cond_resched, "call cond_resched() between iterations");
+
+static bool measure_lock_wait;
+module_param(measure_lock_wait, bool, 0400);
+MODULE_PARM_DESC(measure_lock_wait, "measure lock wait time");
+
+static unsigned long lock_wait_threshold = ULONG_MAX;
+module_param(lock_wait_threshold, ulong, 0400);
+MODULE_PARM_DESC(lock_wait_threshold, "print lock wait time longer than this in nanoseconds, default off");
+
+static bool test_disable_irq;
+module_param_named(disable_irq, test_disable_irq, bool, 0400);
+MODULE_PARM_DESC(disable_irq, "disable interrupts: generate hard-lockups");
+
+static bool disable_softirq;
+module_param(disable_softirq, bool, 0400);
+MODULE_PARM_DESC(disable_softirq, "disable bottom-half irq handlers");
+
+static bool disable_preempt;
+module_param(disable_preempt, bool, 0400);
+MODULE_PARM_DESC(disable_preempt, "disable preemption: generate soft-lockups");
+
+static bool lock_rcu;
+module_param(lock_rcu, bool, 0400);
+MODULE_PARM_DESC(lock_rcu, "grab rcu_read_lock: generate rcu stalls");
+
+static bool lock_mmap_sem;
+module_param(lock_mmap_sem, bool, 0400);
+MODULE_PARM_DESC(lock_mmap_sem, "lock mm->mmap_sem: block procfs interfaces");
+
+static unsigned long lock_rwsem_ptr;
+module_param_unsafe(lock_rwsem_ptr, ulong, 0400);
+MODULE_PARM_DESC(lock_rwsem_ptr, "lock rw_semaphore at address");
+
+static unsigned long lock_mutex_ptr;
+module_param_unsafe(lock_mutex_ptr, ulong, 0400);
+MODULE_PARM_DESC(lock_mutex_ptr, "lock mutex at address");
+
+static unsigned long lock_spinlock_ptr;
+module_param_unsafe(lock_spinlock_ptr, ulong, 0400);
+MODULE_PARM_DESC(lock_spinlock_ptr, "lock spinlock at address");
+
+static unsigned long lock_rwlock_ptr;
+module_param_unsafe(lock_rwlock_ptr, ulong, 0400);
+MODULE_PARM_DESC(lock_rwlock_ptr, "lock rwlock at address");
+
+static unsigned int alloc_pages_nr;
+module_param_unsafe(alloc_pages_nr, uint, 0600);
+MODULE_PARM_DESC(alloc_pages_nr, "allocate and free pages under locks");
+
+static unsigned int alloc_pages_order;
+module_param(alloc_pages_order, uint, 0400);
+MODULE_PARM_DESC(alloc_pages_order, "page order to allocate");
+
+static gfp_t alloc_pages_gfp = GFP_KERNEL;
+module_param_unsafe(alloc_pages_gfp, uint, 0400);
+MODULE_PARM_DESC(alloc_pages_gfp, "allocate pages with this gfp_mask, default GFP_KERNEL");
+
+static bool alloc_pages_atomic;
+module_param(alloc_pages_atomic, bool, 0400);
+MODULE_PARM_DESC(alloc_pages_atomic, "allocate pages with GFP_ATOMIC");
+
+static bool reallocate_pages;
+module_param(reallocate_pages, bool, 0400);
+MODULE_PARM_DESC(reallocate_pages, "free and allocate pages between iterations");
+
+static atomic_t alloc_pages_failed = ATOMIC_INIT(0);
+
+static atomic64_t max_lock_wait = ATOMIC64_INIT(0);
+
+static struct task_struct *main_task;
+static int master_cpu;
+
+static void test_lock(bool master, bool verbose)
+{
+ u64 uninitialized_var(wait_start);
+
+ if (measure_lock_wait)
+ wait_start = local_clock();
+
+ if (lock_mutex_ptr && master) {
+ if (verbose)
+ pr_notice("lock mutex %ps\n", (void *)lock_mutex_ptr);
+ mutex_lock((struct mutex *)lock_mutex_ptr);
+ }
+
+ if (lock_rwsem_ptr && master) {
+ if (verbose)
+ pr_notice("lock rw_semaphore %ps\n",
+ (void *)lock_rwsem_ptr);
+ if (lock_read)
+ down_read((struct rw_semaphore *)lock_rwsem_ptr);
+ else
+ down_write((struct rw_semaphore *)lock_rwsem_ptr);
+ }
+
+ if (lock_mmap_sem && master) {
+ if (verbose)
+ pr_notice("lock mmap_sem pid=%d\n", main_task->pid);
+ if (lock_read)
+ down_read(&main_task->mm->mmap_sem);
+ else
+ down_write(&main_task->mm->mmap_sem);
+ }
+
+ if (test_disable_irq)
+ local_irq_disable();
+
+ if (disable_softirq)
+ local_bh_disable();
+
+ if (disable_preempt)
+ preempt_disable();
+
+ if (lock_rcu)
+ rcu_read_lock();
+
+ if (lock_spinlock_ptr && master) {
+ if (verbose)
+ pr_notice("lock spinlock %ps\n",
+ (void *)lock_spinlock_ptr);
+ spin_lock((spinlock_t *)lock_spinlock_ptr);
+ }
+
+ if (lock_rwlock_ptr && master) {
+ if (verbose)
+ pr_notice("lock rwlock %ps\n",
+ (void *)lock_rwlock_ptr);
+ if (lock_read)
+ read_lock((rwlock_t *)lock_rwlock_ptr);
+ else
+ write_lock((rwlock_t *)lock_rwlock_ptr);
+ }
+
+ if (measure_lock_wait) {
+ s64 cur_wait = local_clock() - wait_start;
+ s64 max_wait = atomic64_read(&max_lock_wait);
+
+ do {
+ if (cur_wait < max_wait)
+ break;
+ max_wait = atomic64_cmpxchg(&max_lock_wait,
+ max_wait, cur_wait);
+ } while (max_wait != cur_wait);
+
+ if (cur_wait > lock_wait_threshold)
+ pr_notice_ratelimited("lock wait %lld ns\n", cur_wait);
+ }
+}
+
+static void test_unlock(bool master, bool verbose)
+{
+ if (lock_rwlock_ptr && master) {
+ if (lock_read)
+ read_unlock((rwlock_t *)lock_rwlock_ptr);
+ else
+ write_unlock((rwlock_t *)lock_rwlock_ptr);
+ if (verbose)
+ pr_notice("unlock rwlock %ps\n",
+ (void *)lock_rwlock_ptr);
+ }
+
+ if (lock_spinlock_ptr && master) {
+ spin_unlock((spinlock_t *)lock_spinlock_ptr);
+ if (verbose)
+ pr_notice("unlock spinlock %ps\n",
+ (void *)lock_spinlock_ptr);
+ }
+
+ if (lock_rcu)
+ rcu_read_unlock();
+
+ if (disable_preempt)
+ preempt_enable();
+
+ if (disable_softirq)
+ local_bh_enable();
+
+ if (test_disable_irq)
+ local_irq_enable();
+
+ if (lock_mmap_sem && master) {
+ if (lock_read)
+ up_read(&main_task->mm->mmap_sem);
+ else
+ up_write(&main_task->mm->mmap_sem);
+ if (verbose)
+ pr_notice("unlock mmap_sem pid=%d\n", main_task->pid);
+ }
+
+ if (lock_rwsem_ptr && master) {
+ if (lock_read)
+ up_read((struct rw_semaphore *)lock_rwsem_ptr);
+ else
+ up_write((struct rw_semaphore *)lock_rwsem_ptr);
+ if (verbose)
+ pr_notice("unlock rw_semaphore %ps\n",
+ (void *)lock_rwsem_ptr);
+ }
+
+ if (lock_mutex_ptr && master) {
+ mutex_unlock((struct mutex *)lock_mutex_ptr);
+ if (verbose)
+ pr_notice("unlock mutex %ps\n",
+ (void *)lock_mutex_ptr);
+ }
+}
+
+static void test_alloc_pages(struct list_head *pages)
+{
+ struct page *page;
+ unsigned int i;
+
+ for (i = 0; i < alloc_pages_nr; i++) {
+ page = alloc_pages(alloc_pages_gfp, alloc_pages_order);
+ if (!page) {
+ atomic_inc(&alloc_pages_failed);
+ break;
+ }
+ list_add(&page->lru, pages);
+ }
+}
+
+static void test_free_pages(struct list_head *pages)
+{
+ struct page *page, *next;
+
+ list_for_each_entry_safe(page, next, pages, lru)
+ __free_pages(page, alloc_pages_order);
+ INIT_LIST_HEAD(pages);
+}
+
+static void test_wait(unsigned int secs, unsigned int nsecs)
+{
+ if (wait_state == TASK_RUNNING) {
+ if (secs)
+ mdelay(secs * MSEC_PER_SEC);
+ if (nsecs)
+ ndelay(nsecs);
+ return;
+ }
+
+ __set_current_state(wait_state);
+ if (use_hrtimer) {
+ ktime_t time;
+
+ time = ns_to_ktime((u64)secs * NSEC_PER_SEC + nsecs);
+ schedule_hrtimeout(&time, HRTIMER_MODE_REL);
+ } else {
+ schedule_timeout(secs * HZ + nsecs_to_jiffies(nsecs));
+ }
+}
+
+static void test_lockup(bool master)
+{
+ u64 lockup_start = local_clock();
+ unsigned int iter = 0;
+ LIST_HEAD(pages);
+
+ pr_notice("Start on CPU%d\n", raw_smp_processor_id());
+
+ test_lock(master, true);
+
+ test_alloc_pages(&pages);
+
+ while (iter++ < iterations && !signal_pending(main_task)) {
+
+ if (iowait)
+ current->in_iowait = 1;
+
+ test_wait(time_secs, time_nsecs);
+
+ if (iowait)
+ current->in_iowait = 0;
+
+ if (reallocate_pages)
+ test_free_pages(&pages);
+
+ if (reacquire_locks)
+ test_unlock(master, false);
+
+ if (touch_softlockup)
+ touch_softlockup_watchdog();
+
+ if (touch_hardlockup)
+ touch_nmi_watchdog();
+
+ if (call_cond_resched)
+ cond_resched();
+
+ test_wait(cooldown_secs, cooldown_nsecs);
+
+ if (reacquire_locks)
+ test_lock(master, false);
+
+ if (reallocate_pages)
+ test_alloc_pages(&pages);
+ }
+
+ pr_notice("Finish on CPU%d in %lld ns\n", raw_smp_processor_id(),
+ local_clock() - lockup_start);
+
+ test_free_pages(&pages);
+
+ test_unlock(master, true);
+}
+
+DEFINE_PER_CPU(struct work_struct, test_works);
+
+static void test_work_fn(struct work_struct *work)
+{
+ test_lockup(!lock_single ||
+ work == per_cpu_ptr(&test_works, master_cpu));
+}
+
+static bool test_kernel_ptr(unsigned long addr, int size)
+{
+ void *ptr = (void *)addr;
+ char buf;
+
+ if (!addr)
+ return false;
+
+ /* should be at least readable kernel address */
+ if (access_ok(ptr, 1) ||
+ access_ok(ptr + size - 1, 1) ||
+ probe_kernel_address(ptr, buf) ||
+ probe_kernel_address(ptr + size - 1, buf)) {
+ pr_err("invalid kernel ptr: %#lx\n", addr);
+ return true;
+ }
+
+ return false;
+}
+
+static bool __maybe_unused test_magic(unsigned long addr, int offset,
+ unsigned int expected)
+{
+ void *ptr = (void *)addr + offset;
+ unsigned int magic = 0;
+
+ if (!addr)
+ return false;
+
+ if (probe_kernel_address(ptr, magic) || magic != expected) {
+ pr_err("invalid magic at %#lx + %#x = %#x, expected %#x\n",
+ addr, offset, magic, expected);
+ return true;
+ }
+
+ return false;
+}
+
+static int __init test_lockup_init(void)
+{
+ u64 test_start = local_clock();
+
+ main_task = current;
+
+ switch (state[0]) {
+ case 'S':
+ wait_state = TASK_INTERRUPTIBLE;
+ break;
+ case 'D':
+ wait_state = TASK_UNINTERRUPTIBLE;
+ break;
+ case 'K':
+ wait_state = TASK_KILLABLE;
+ break;
+ case 'R':
+ wait_state = TASK_RUNNING;
+ break;
+ default:
+ pr_err("unknown state=%s\n", state);
+ return -EINVAL;
+ }
+
+ if (alloc_pages_atomic)
+ alloc_pages_gfp = GFP_ATOMIC;
+
+ if (test_kernel_ptr(lock_spinlock_ptr, sizeof(spinlock_t)) ||
+ test_kernel_ptr(lock_rwlock_ptr, sizeof(rwlock_t)) ||
+ test_kernel_ptr(lock_mutex_ptr, sizeof(struct mutex)) ||
+ test_kernel_ptr(lock_rwsem_ptr, sizeof(struct rw_semaphore)))
+ return -EINVAL;
+
+#ifdef CONFIG_DEBUG_SPINLOCK
+ if (test_magic(lock_spinlock_ptr,
+ offsetof(spinlock_t, rlock.magic),
+ SPINLOCK_MAGIC) ||
+ test_magic(lock_rwlock_ptr,
+ offsetof(rwlock_t, magic),
+ RWLOCK_MAGIC) ||
+ test_magic(lock_mutex_ptr,
+ offsetof(struct mutex, wait_lock.rlock.magic),
+ SPINLOCK_MAGIC) ||
+ test_magic(lock_rwsem_ptr,
+ offsetof(struct rw_semaphore, wait_lock.magic),
+ SPINLOCK_MAGIC))
+ return -EINVAL;
+#endif
+
+ if ((wait_state != TASK_RUNNING ||
+ (call_cond_resched && !reacquire_locks) ||
+ (alloc_pages_nr && gfpflags_allow_blocking(alloc_pages_gfp))) &&
+ (test_disable_irq || disable_softirq || disable_preempt ||
+ lock_rcu || lock_spinlock_ptr || lock_rwlock_ptr)) {
+ pr_err("refuse to sleep in atomic context\n");
+ return -EINVAL;
+ }
+
+ if (lock_mmap_sem && !main_task->mm) {
+ pr_err("no mm to lock mmap_sem\n");
+ return -EINVAL;
+ }
+
+ pr_notice("START pid=%d time=%u +%u ns cooldown=%u +%u ns iteraions=%u state=%s %s%s%s%s%s%s%s%s%s%s%s\n",
+ main_task->pid, time_secs, time_nsecs,
+ cooldown_secs, cooldown_nsecs, iterations, state,
+ all_cpus ? "all_cpus " : "",
+ iowait ? "iowait " : "",
+ test_disable_irq ? "disable_irq " : "",
+ disable_softirq ? "disable_softirq " : "",
+ disable_preempt ? "disable_preempt " : "",
+ lock_rcu ? "lock_rcu " : "",
+ lock_read ? "lock_read " : "",
+ touch_softlockup ? "touch_softlockup " : "",
+ touch_hardlockup ? "touch_hardlockup " : "",
+ call_cond_resched ? "call_cond_resched " : "",
+ reacquire_locks ? "reacquire_locks " : "");
+
+ if (alloc_pages_nr)
+ pr_notice("ALLOCATE PAGES nr=%u order=%u gfp=%pGg %s\n",
+ alloc_pages_nr, alloc_pages_order, &alloc_pages_gfp,
+ reallocate_pages ? "reallocate_pages " : "");
+
+ if (all_cpus) {
+ unsigned int cpu;
+
+ cpus_read_lock();
+
+ preempt_disable();
+ master_cpu = smp_processor_id();
+ for_each_online_cpu(cpu) {
+ INIT_WORK(per_cpu_ptr(&test_works, cpu), test_work_fn);
+ queue_work_on(cpu, system_highpri_wq,
+ per_cpu_ptr(&test_works, cpu));
+ }
+ preempt_enable();
+
+ for_each_online_cpu(cpu)
+ flush_work(per_cpu_ptr(&test_works, cpu));
+
+ cpus_read_unlock();
+ } else {
+ test_lockup(true);
+ }
+
+ if (measure_lock_wait)
+ pr_notice("Maximum lock wait: %lld ns\n",
+ atomic64_read(&max_lock_wait));
+
+ if (alloc_pages_nr)
+ pr_notice("Page allocation failed %u times\n",
+ atomic_read(&alloc_pages_failed));
+
+ pr_notice("FINISH in %llu ns\n", local_clock() - test_start);
+
+ if (signal_pending(main_task))
+ return -EINTR;
+
+ return -EAGAIN;
+}
+module_init(test_lockup_init);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Konstantin Khlebnikov <khlebnikov@yandex-team.ru>");
+MODULE_DESCRIPTION("Test module to generate lockups");
_
next prev parent reply other threads:[~2020-04-07 3:09 UTC|newest]
Thread overview: 194+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-07 3:02 incoming Andrew Morton
2020-04-07 3:03 ` [patch 001/166] mm, memcg: bypass high reclaim iteration for cgroup hierarchy root Andrew Morton
2020-04-07 3:03 ` [patch 002/166] mm: don't prepare anon_vma if vma has VM_WIPEONFORK Andrew Morton
2020-04-07 3:03 ` [patch 003/166] Revert "mm/rmap.c: reuse mergeable anon_vma as parent when fork" Andrew Morton
2020-04-07 3:03 ` [patch 004/166] mm: set vm_next and vm_prev to NULL in vm_area_dup() Andrew Morton
2020-04-07 3:03 ` [patch 005/166] mm/vma: add missing VMA flag readable name for VM_SYNC Andrew Morton
2020-04-07 3:03 ` [patch 006/166] mm/vma: make vma_is_accessible() available for general use Andrew Morton
2020-04-07 3:03 ` [patch 007/166] mm/vma: replace all remaining open encodings with is_vm_hugetlb_page() Andrew Morton
2020-04-07 3:03 ` [patch 008/166] mm/vma: replace all remaining open encodings with vma_is_anonymous() Andrew Morton
2020-04-07 3:03 ` [patch 009/166] mm/vma: append unlikely() while testing VMA access permissions Andrew Morton
2020-04-07 3:04 ` [patch 010/166] mm/vmalloc: fix a typo in comment Andrew Morton
2020-04-07 3:04 ` [patch 011/166] mm: make it clear that gfp reclaim modifiers are valid only for sleepable allocations Andrew Morton
2020-04-07 3:04 ` [patch 012/166] mm/migrate.c: no need to check for i > start in do_pages_move() Andrew Morton
2020-04-07 3:04 ` [patch 013/166] mm/migrate.c: wrap do_move_pages_to_node() and store_status() Andrew Morton
2020-04-07 3:04 ` [patch 014/166] mm/migrate.c: check pagelist in move_pages_and_store_status() Andrew Morton
2020-04-07 3:04 ` [patch 015/166] mm/migrate.c: unify "not queued for migration" handling in do_pages_move() Andrew Morton
2020-04-07 3:04 ` [patch 016/166] mm/migrate.c: migrate PG_readahead flag Andrew Morton
2020-04-07 3:04 ` [patch 017/166] mm, shmem: add vmstat for hugepage fallback Andrew Morton
2020-04-07 3:04 ` [patch 018/166] mm, thp: track fallbacks due to failed memcg charges separately Andrew Morton
2020-04-07 3:04 ` [patch 019/166] include/linux/pagemap.h: optimise find_subpage for !THP Andrew Morton
2020-04-07 3:04 ` [patch 020/166] mm: remove CONFIG_TRANSPARENT_HUGE_PAGECACHE Andrew Morton
2020-04-07 3:04 ` [patch 021/166] mm/ksm.c: update get_user_pages() argument in comment Andrew Morton
2020-04-07 3:04 ` [patch 022/166] mm: code cleanup for MADV_FREE Andrew Morton
2020-04-07 3:04 ` [patch 023/166] mm: adjust shuffle code to allow for future coalescing Andrew Morton
2020-04-07 3:04 ` [patch 024/166] mm: use zone and order instead of free area in free_list manipulators Andrew Morton
2020-04-07 3:04 ` [patch 025/166] mm: add function __putback_isolated_page Andrew Morton
2020-04-07 3:04 ` [patch 026/166] mm: introduce Reported pages Andrew Morton
2020-04-07 3:05 ` [patch 027/166] virtio-balloon: pull page poisoning config out of free page hinting Andrew Morton
2020-04-07 3:05 ` [patch 028/166] virtio-balloon: add support for providing free page reports to host Andrew Morton
2020-04-07 3:05 ` [patch 029/166] mm/page_reporting: rotate reported pages to the tail of the list Andrew Morton
2020-04-07 3:05 ` [patch 030/166] mm/page_reporting: add budget limit on how many pages can be reported per pass Andrew Morton
2020-04-07 3:05 ` [patch 031/166] mm/page_reporting: add free page reporting documentation Andrew Morton
2020-04-07 3:05 ` [patch 032/166] virtio-balloon: switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM Andrew Morton
2020-04-07 3:05 ` [patch 033/166] userfaultfd: wp: add helper for writeprotect check Andrew Morton
2020-04-07 3:05 ` [patch 034/166] userfaultfd: wp: hook userfault handler to write protection fault Andrew Morton
2020-04-07 3:05 ` [patch 035/166] userfaultfd: wp: add WP pagetable tracking to x86 Andrew Morton
2020-04-07 3:05 ` [patch 036/166] userfaultfd: wp: userfaultfd_pte/huge_pmd_wp() helpers Andrew Morton
2020-04-07 3:05 ` [patch 037/166] userfaultfd: wp: add UFFDIO_COPY_MODE_WP Andrew Morton
2020-04-07 3:05 ` [patch 038/166] mm: merge parameters for change_protection() Andrew Morton
2020-04-07 3:05 ` [patch 039/166] userfaultfd: wp: apply _PAGE_UFFD_WP bit Andrew Morton
2020-04-07 3:05 ` [patch 040/166] userfaultfd: wp: drop _PAGE_UFFD_WP properly when fork Andrew Morton
2020-04-07 3:05 ` [patch 041/166] userfaultfd: wp: add pmd_swp_*uffd_wp() helpers Andrew Morton
2020-04-07 3:06 ` [patch 042/166] userfaultfd: wp: support swap and page migration Andrew Morton
2020-04-07 3:06 ` [patch 043/166] khugepaged: skip collapse if uffd-wp detected Andrew Morton
2020-04-07 3:06 ` [patch 044/166] userfaultfd: wp: support write protection for userfault vma range Andrew Morton
2020-04-07 3:06 ` [patch 045/166] userfaultfd: wp: add the writeprotect API to userfaultfd ioctl Andrew Morton
2020-04-07 3:06 ` [patch 046/166] userfaultfd: wp: enabled write protection in userfaultfd API Andrew Morton
2020-04-07 3:06 ` [patch 047/166] userfaultfd: wp: don't wake up when doing write protect Andrew Morton
2020-04-07 3:06 ` [patch 048/166] userfaultfd: wp: UFFDIO_REGISTER_MODE_WP documentation update Andrew Morton
2020-04-07 3:06 ` [patch 049/166] userfaultfd: wp: declare _UFFDIO_WRITEPROTECT conditionally Andrew Morton
2020-04-07 3:06 ` [patch 050/166] userfaultfd: selftests: refactor statistics Andrew Morton
2020-04-07 3:06 ` [patch 051/166] userfaultfd: selftests: add write-protect test Andrew Morton
2020-04-07 3:06 ` [patch 052/166] drivers/base/memory.c: drop section_count Andrew Morton
2020-04-07 3:06 ` [patch 053/166] drivers/base/memory.c: drop pages_correctly_probed() Andrew Morton
2020-04-07 3:06 ` [patch 054/166] mm/page_ext.c: drop pfn_present() check when onlining Andrew Morton
2020-04-07 3:06 ` [patch 055/166] mm/memory_hotplug.c: only respect mem= parameter during boot stage Andrew Morton
2020-04-07 3:06 ` [patch 056/166] mm/memory_hotplug.c: simplify calculation of number of pages in __remove_pages() Andrew Morton
2020-04-07 3:06 ` [patch 057/166] mm/memory_hotplug.c: cleanup __add_pages() Andrew Morton
2020-04-07 3:07 ` [patch 058/166] mm/sparse.c: introduce new function fill_subsection_map() Andrew Morton
2020-04-07 3:07 ` [patch 059/166] mm/sparse.c: introduce a new function clear_subsection_map() Andrew Morton
2020-04-07 3:07 ` [patch 060/166] mm/sparse.c: only use subsection map in VMEMMAP case Andrew Morton
2020-04-07 3:07 ` [patch 061/166] mm/sparse.c: add note about only VMEMMAP supporting sub-section hotplug Andrew Morton
2020-04-07 3:07 ` [patch 062/166] mm/sparse.c: move subsection_map related functions together Andrew Morton
2020-04-07 3:07 ` [patch 063/166] drivers/base/memory: rename MMOP_ONLINE_KEEP to MMOP_ONLINE Andrew Morton
2020-04-07 3:07 ` [patch 064/166] drivers/base/memory: map MMOP_OFFLINE to 0 Andrew Morton
2020-04-07 3:07 ` [patch 065/166] drivers/base/memory: store mapping between MMOP_* and string in an array Andrew Morton
2020-04-07 3:07 ` [patch 066/166] powernv/memtrace: always online added memory blocks Andrew Morton
2020-04-07 3:07 ` [patch 067/166] hv_balloon: don't check for memhp_auto_online manually Andrew Morton
2020-04-07 3:07 ` [patch 068/166] mm/memory_hotplug: unexport memhp_auto_online Andrew Morton
2020-04-07 3:07 ` [patch 069/166] mm/memory_hotplug: convert memhp_auto_online to store an online_type Andrew Morton
2020-04-07 3:07 ` [patch 070/166] mm/memory_hotplug: allow to specify a default online_type Andrew Morton
2020-04-07 3:07 ` [patch 071/166] mm/memory_hotplug.c: use __pfn_to_section() instead of open-coding Andrew Morton
2020-04-07 3:07 ` [patch 072/166] mm/shmem.c: distribute switch variables for initialization Andrew Morton
2020-04-07 3:07 ` [patch 073/166] mm/shmem.c: clean code by removing unnecessary assignment Andrew Morton
2020-04-07 3:07 ` [patch 074/166] mm: huge tmpfs: try to split_huge_page() when punching hole Andrew Morton
2020-04-07 3:08 ` [patch 075/166] mm: prevent a warning when casting void* -> enum Andrew Morton
2020-04-07 3:08 ` [patch 076/166] mm/zswap: allow setting default status, compressor and allocator in Kconfig Andrew Morton
2020-04-07 3:08 ` [patch 077/166] mm/compaction: add missing annotation for compact_lock_irqsave Andrew Morton
2020-04-07 3:08 ` [patch 078/166] mm/hugetlb: add missing annotation for gather_surplus_pages() Andrew Morton
2020-04-07 3:08 ` [patch 079/166] mm/mempolicy: add missing annotation for queue_pages_pmd() Andrew Morton
2020-04-07 3:08 ` [patch 080/166] mm/slub: add missing annotation for get_map() Andrew Morton
2020-04-07 3:08 ` [patch 081/166] mm/slub: add missing annotation for put_map() Andrew Morton
2020-04-07 3:08 ` [patch 082/166] mm/zsmalloc: add missing annotation for migrate_read_lock() Andrew Morton
2020-04-07 3:08 ` [patch 083/166] mm/zsmalloc: add missing annotation for migrate_read_unlock() Andrew Morton
2020-04-07 3:08 ` [patch 084/166] mm/zsmalloc: add missing annotation for pin_tag() Andrew Morton
2020-04-07 3:08 ` [patch 085/166] mm/zsmalloc: add missing annotation for unpin_tag() Andrew Morton
2020-04-07 3:08 ` [patch 086/166] mm: fix ambiguous comments for better code readability Andrew Morton
2020-04-07 3:08 ` [patch 087/166] mm/mm_init.c: clean code. Use BUILD_BUG_ON when comparing compile time constant Andrew Morton
2020-04-07 3:08 ` [patch 088/166] mm: use fallthrough; Andrew Morton
2020-04-07 3:08 ` [patch 089/166] include/linux/swapops.h: correct guards for non_swap_entry() Andrew Morton
2020-04-07 3:08 ` [patch 090/166] include/linux/memremap.h: remove stale comments Andrew Morton
2020-04-07 3:08 ` [patch 091/166] mm/dmapool.c: micro-optimisation remove unnecessary branch Andrew Morton
2020-04-07 3:08 ` [patch 092/166] mm: remove dummy struct bootmem_data/bootmem_data_t Andrew Morton
2020-04-07 3:08 ` [patch 093/166] fs/proc/inode.c: annotate close_pdeo() for sparse Andrew Morton
2020-04-07 3:09 ` [patch 094/166] proc: faster open/read/close with "permanent" files Andrew Morton
2020-04-07 3:09 ` [patch 095/166] proc: speed up /proc/*/statm Andrew Morton
2020-04-07 3:09 ` [patch 096/166] proc: inline vma_stop into m_stop Andrew Morton
2020-04-07 3:09 ` [patch 097/166] proc: remove m_cache_vma Andrew Morton
2020-04-07 3:09 ` [patch 098/166] proc: use ppos instead of m->version Andrew Morton
2020-04-07 3:09 ` [patch 099/166] seq_file: remove m->version Andrew Morton
2020-04-07 3:09 ` [patch 100/166] proc: inline m_next_vma into m_next Andrew Morton
2020-04-07 3:09 ` [patch 101/166] asm-generic: fix unistd_32.h generation format Andrew Morton
2020-04-07 3:09 ` [patch 102/166] kernel/extable.c: use address-of operator on section symbols Andrew Morton
2020-04-07 3:09 ` [patch 103/166] sparc,x86: vdso: remove meaningless undefining CONFIG_OPTIMIZE_INLINING Andrew Morton
2020-04-07 3:09 ` [patch 104/166] compiler: remove CONFIG_OPTIMIZE_INLINING entirely Andrew Morton
2020-04-07 3:09 ` [patch 105/166] compiler.h: fix error in BUILD_BUG_ON() reporting Andrew Morton
2020-04-07 3:09 ` [patch 106/166] MAINTAINERS: list the section entries in the preferred order Andrew Morton
2020-04-07 3:09 ` [patch 107/166] bitops: always inline sign extension helpers Andrew Morton
2020-04-07 3:09 ` Andrew Morton [this message]
2020-04-07 3:09 ` [patch 109/166] lib/test_lockup.c: fix spelling mistake "iteraions" -> "iterations" Andrew Morton
2020-04-07 3:09 ` [patch 110/166] lib/test_lockup.c: add parameters for locking generic vfs locks Andrew Morton
2020-04-07 3:09 ` [patch 111/166] lib/bch.c: replace zero-length array with flexible-array member Andrew Morton
2020-04-07 3:10 ` [patch 112/166] lib/ts_bm.c: " Andrew Morton
2020-04-07 3:10 ` [patch 113/166] lib/ts_fsm.c: " Andrew Morton
2020-04-07 3:10 ` [patch 114/166] lib/ts_kmp.c: " Andrew Morton
2020-04-07 3:10 ` [patch 115/166] lib/scatterlist: fix sg_copy_buffer() kerneldoc Andrew Morton
2020-04-07 3:10 ` [patch 116/166] lib: test_stackinit.c: XFAIL switch variable init tests Andrew Morton
2020-04-07 3:10 ` [patch 117/166] lib/stackdepot.c: check depot_index before accessing the stack slab Andrew Morton
2020-04-07 3:10 ` [patch 118/166] lib/stackdepot.c: build with -fno-builtin Andrew Morton
2020-04-07 3:10 ` [patch 119/166] kasan: stackdepot: move filter_irq_stacks() to stackdepot.c Andrew Morton
2020-04-07 3:10 ` [patch 120/166] percpu_counter: fix a data race at vm_committed_as Andrew Morton
2020-04-07 3:10 ` [patch 121/166] lib/test_bitmap.c: make use of EXP2_IN_BITS Andrew Morton
2020-04-07 3:10 ` [patch 122/166] lib/rbtree: fix coding style of assignments Andrew Morton
2020-04-07 3:10 ` [patch 123/166] lib/test_kmod.c: remove a NULL test Andrew Morton
2020-04-07 3:10 ` [patch 124/166] linux/bits.h: add compile time sanity check of GENMASK inputs Andrew Morton
2020-04-07 3:10 ` [patch 125/166] lib/list: prevent compiler reloads inside 'safe' list iteration Andrew Morton
2020-04-07 3:10 ` [patch 126/166] lib/dynamic_debug.c: use address-of operator on section symbols Andrew Morton
2020-04-07 3:10 ` [patch 127/166] checkpatch: remove email address comment from email address comparisons Andrew Morton
2020-04-07 3:10 ` [patch 128/166] checkpatch: check SPDX tags in YAML files Andrew Morton
2020-04-07 3:10 ` [patch 129/166] checkpatch: support "base-commit:" format Andrew Morton
2020-04-07 3:10 ` [patch 130/166] checkpatch: prefer fallthrough; over fallthrough comments Andrew Morton
2020-04-07 3:11 ` [patch 131/166] checkpatch: fix minor typo and mixed space+tab in indentation Andrew Morton
2020-04-07 3:11 ` [patch 132/166] checkpatch: fix multiple const * types Andrew Morton
2020-04-07 3:11 ` [patch 133/166] checkpatch: add command-line option for TAB size Andrew Morton
2020-04-07 3:11 ` [patch 134/166] checkpatch: improve Gerrit Change-Id: test Andrew Morton
2020-04-07 3:11 ` [patch 135/166] checkpatch: check proper licensing of Devicetree bindings Andrew Morton
2020-04-07 3:11 ` [patch 136/166] checkpatch: avoid warning about uninitialized_var() Andrew Morton
2020-04-07 3:11 ` [patch 137/166] kselftest: introduce new epoll test case Andrew Morton
2020-04-07 3:11 ` [patch 138/166] fs/epoll: make nesting accounting safe for -rt kernel Andrew Morton
2020-04-07 3:11 ` [patch 139/166] fs/binfmt_elf.c: delete "loc" variable Andrew Morton
2020-04-07 3:11 ` [patch 140/166] fs/binfmt_elf.c: allocate less for static executable Andrew Morton
2020-04-07 3:11 ` [patch 141/166] fs/binfmt_elf.c: don't free interpreter's ELF pheaders on common path Andrew Morton
2020-04-07 3:11 ` [patch 142/166] samples/hw_breakpoint: drop HW_BREAKPOINT_R when reporting writes Andrew Morton
2020-04-07 3:11 ` [patch 143/166] samples/hw_breakpoint: drop use of kallsyms_lookup_name() Andrew Morton
2020-04-07 3:11 ` [patch 144/166] kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol() Andrew Morton
2020-04-07 3:11 ` [patch 145/166] reiserfs: clean up several indentation issues Andrew Morton
2020-04-07 3:11 ` [patch 146/166] kernel/kmod.c: fix a typo "assuems" -> "assumes" Andrew Morton
2020-04-07 3:11 ` [patch 147/166] gcov: gcc_4_7: replace zero-length array with flexible-array member Andrew Morton
2020-04-07 3:11 ` [patch 148/166] gcov: gcc_3_4: " Andrew Morton
2020-04-07 3:11 ` [patch 149/166] kernel/gcov/fs.c: " Andrew Morton
2020-04-07 3:12 ` [patch 150/166] init/Kconfig: clean up ANON_INODES and old IO schedulers options Andrew Morton
2020-04-07 3:12 ` [patch 151/166] kcov: cleanup debug messages Andrew Morton
2020-04-07 3:12 ` [patch 152/166] kcov: fix potential use-after-free in kcov_remote_start Andrew Morton
2020-04-07 3:12 ` [patch 153/166] kcov: move t->kcov assignments into kcov_start/stop Andrew Morton
2020-04-07 3:12 ` [patch 154/166] kcov: move t->kcov_sequence assignment Andrew Morton
2020-04-07 3:12 ` [patch 155/166] kcov: use t->kcov_mode as enabled indicator Andrew Morton
2020-04-07 3:12 ` [patch 156/166] kcov: collect coverage from interrupts Andrew Morton
2020-04-07 3:12 ` [patch 157/166] usb: core: kcov: collect coverage from usb complete callback Andrew Morton
2020-04-07 3:12 ` [patch 158/166] ubsan: add trap instrumentation option Andrew Morton
2020-04-07 3:12 ` [patch 159/166] ubsan: split "bounds" checker from other options Andrew Morton
2020-04-07 3:12 ` [patch 160/166] drivers/misc/lkdtm/bugs.c: add arithmetic overflow and array bounds checks Andrew Morton
2020-04-07 3:12 ` [patch 161/166] ubsan: check panic_on_warn Andrew Morton
2020-04-07 3:12 ` [patch 162/166] kasan: unset panic_on_warn before calling panic() Andrew Morton
2020-04-07 3:12 ` [patch 163/166] ubsan: include bug type in report header Andrew Morton
2020-04-07 3:12 ` [patch 164/166] lib/Kconfig.debug: fix a typo "capabilitiy" -> "capability" Andrew Morton
2020-04-07 3:12 ` [patch 165/166] ipc/mqueue.c: fix a brace coding style issue Andrew Morton
2020-04-07 3:12 ` [patch 166/166] ipc/shm.c: make compat_ksys_shmctl() static Andrew Morton
2020-04-07 22:12 ` + mm-gup-mark-lock-taken-only-after-a-successful-retake.patch added to -mm tree Andrew Morton
2020-04-09 0:32 ` + proc-use-a-dedicated-lock-in-struct-pid.patch " Andrew Morton
2020-04-09 0:34 ` + docs-mm-slabh-fix-a-broken-cross-reference.patch " Andrew Morton
2020-04-09 0:39 ` + mm-page_alloc-fix-kernel-doc-warning.patch " Andrew Morton
2020-04-09 0:57 ` [folded-merged] mm-hugetlb-optionally-allocate-gigantic-hugepages-using-cma-v5.patch removed from " Andrew Morton
2020-04-09 0:57 ` [folded-merged] mm-hugetlb-optionally-allocate-gigantic-hugepages-using-cma-fix.patch " Andrew Morton
2020-04-09 0:58 ` [to-be-updated] mm-hugetlb-optionally-allocate-gigantic-hugepages-using-cma.patch " Andrew Morton
2020-04-09 0:58 ` [to-be-updated] mm-hugetlb-optionally-allocate-gigantic-hugepages-using-cma-fix-2.patch " Andrew Morton
2020-04-09 0:58 ` [to-be-updated] mm-hugetlbc-fix-printk-format-warning-for-32-bit-phys_addr_t.patch " Andrew Morton
2020-04-09 0:58 ` [to-be-updated] mm-hugetlbc-fix-printk-format-warning-for-32-bit-phys_addr_t-fix.patch " Andrew Morton
2020-04-09 1:00 ` + mm-cma-numa-node-interface.patch added to " Andrew Morton
2020-04-09 1:00 ` + mm-hugetlb-optionally-allocate-gigantic-hugepages-using-cma.patch " Andrew Morton
2020-04-09 1:03 ` [nacked] list-prevent-compiler-reloads-inside-safe-list-iteration.patch removed from " Andrew Morton
2020-04-09 1:07 ` + fat-dont-allow-to-mount-if-the-fat-length-==-0.patch added to " Andrew Morton
2020-04-09 1:10 ` + mm-gup-fix-null-pointer-dereference-detected-by-coverity.patch " Andrew Morton
2020-04-09 1:11 ` + ocfs2-no-need-try-to-truncate-file-beyond-i_size.patch " Andrew Morton
2020-04-09 1:24 ` [obsolete] mm-clarify-__gfp_memalloc-usage-checkpatch-fixes.patch removed from " Andrew Morton
2020-04-09 1:25 ` + mm-clarify-__gfp_memalloc-usage-update.patch added to " Andrew Morton
2020-04-09 1:26 ` + mm-clarify-__gfp_memalloc-usage-update-checkpatch-fixes.patch " Andrew Morton
2020-04-09 1:30 ` + mm-page_alloc-make-pcpu_drain_mutex-and-pcpu_drain-static.patch " Andrew Morton
2020-04-09 4:39 ` + mm-cma-numa-node-interface-fix.patch " Andrew Morton
2020-04-10 4:53 ` + lib-math-avoid-trailing-n-hidden-in-pr_fmt.patch " Andrew Morton
2020-04-10 4:55 ` + mm-mmap-initialize-align_offset-explicitly-for-vm_unmapped_area.patch " Andrew Morton
2020-04-10 18:38 ` + mm-memory_hotplug-fix-a-typo-in-comment-recoreded-recorded.patch " Andrew Morton
2020-04-10 18:38 ` + mm-ksm-fix-a-typo-in-comment-alreaady-already.patch " Andrew Morton
2020-04-10 18:38 ` + mm-mmap-fix-a-typo-in-comment-compatbility-compatibility.patch " Andrew Morton
2020-04-10 18:38 ` + mm-hugetlb-fix-a-typo-in-comment-manitained-maintained.patch " Andrew Morton
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