diff options
| author | Bart Van Assche <bvanassche@acm.org> | 2019-07-22 11:24:43 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-07-25 15:43:28 +0200 |
| commit | 8c779229d0f4fe83ead90bdcbbf08b02989aa200 (patch) | |
| tree | 2a9d6239c74f3889ec46a4ea0037d32d8dd41505 /kernel/locking/lockdep_internals.h | |
| parent | 12593b7467f9130b64a6d4b6a26ed4ec217b6784 (diff) | |
locking/lockdep: Report more stack trace statistics
Report the number of stack traces and the number of stack trace hash
chains. These two numbers are useful because these allow to estimate
the number of stack trace hash collisions.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Link: https://lkml.kernel.org/r/20190722182443.216015-5-bvanassche@acm.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/locking/lockdep_internals.h')
| -rw-r--r-- | kernel/locking/lockdep_internals.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/locking/lockdep_internals.h b/kernel/locking/lockdep_internals.h index 93a008bf77db..18d85aebbb57 100644 --- a/kernel/locking/lockdep_internals.h +++ b/kernel/locking/lockdep_internals.h @@ -140,6 +140,10 @@ extern unsigned int max_bfs_queue_depth; #ifdef CONFIG_PROVE_LOCKING extern unsigned long lockdep_count_forward_deps(struct lock_class *); extern unsigned long lockdep_count_backward_deps(struct lock_class *); +#ifdef CONFIG_TRACE_IRQFLAGS +u64 lockdep_stack_trace_count(void); +u64 lockdep_stack_hash_count(void); +#endif #else static inline unsigned long lockdep_count_forward_deps(struct lock_class *class) |