diff options
| author | Waiman Long <longman@redhat.com> | 2025-03-08 02:26:54 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-03-08 02:55:03 +0300 |
| commit | a94d32446ab5e85c7ba97e48a8c9bd85be4fe889 (patch) | |
| tree | a736176aa02c24211b5074d9422f2422b596fedc | |
| parent | b76b44fb656100fcd8482d9102d35d1b6a5129e9 (diff) | |
| download | linux-a94d32446ab5e85c7ba97e48a8c9bd85be4fe889.tar.xz | |
locking/lock_events: Add locking events for lockdep
Add some lock events to lockdep to profile its behavior.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250307232717.1759087-5-boqun.feng@gmail.com
| -rw-r--r-- | kernel/locking/lock_events_list.h | 7 | ||||
| -rw-r--r-- | kernel/locking/lockdep.c | 8 |
2 files changed, 14 insertions, 1 deletions
diff --git a/kernel/locking/lock_events_list.h b/kernel/locking/lock_events_list.h index 80b11f194c9f..9ef9850aeebe 100644 --- a/kernel/locking/lock_events_list.h +++ b/kernel/locking/lock_events_list.h @@ -88,3 +88,10 @@ LOCK_EVENT(rtmutex_slow_acq3) /* # of locks acquired in *block() */ LOCK_EVENT(rtmutex_slow_sleep) /* # of sleeps */ LOCK_EVENT(rtmutex_slow_wake) /* # of wakeup's */ LOCK_EVENT(rtmutex_deadlock) /* # of rt_mutex_handle_deadlock()'s */ + +/* + * Locking events for lockdep + */ +LOCK_EVENT(lockdep_acquire) +LOCK_EVENT(lockdep_lock) +LOCK_EVENT(lockdep_nocheck) diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 4470680f0226..8436f017c74d 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -61,6 +61,7 @@ #include <asm/sections.h> #include "lockdep_internals.h" +#include "lock_events.h" #include <trace/events/lock.h> @@ -170,6 +171,7 @@ static struct task_struct *lockdep_selftest_task_struct; static int graph_lock(void) { lockdep_lock(); + lockevent_inc(lockdep_lock); /* * Make sure that if another CPU detected a bug while * walking the graph we dont change it (while the other @@ -5091,8 +5093,12 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass, if (unlikely(lock->key == &__lockdep_no_track__)) return 0; - if (!prove_locking || lock->key == &__lockdep_no_validate__) + lockevent_inc(lockdep_acquire); + + if (!prove_locking || lock->key == &__lockdep_no_validate__) { check = 0; + lockevent_inc(lockdep_nocheck); + } if (subclass < NR_LOCKDEP_CACHING_CLASSES) class = lock->class_cache[subclass]; |