diff options
| author |   Namhyung Kim <namhyung@kernel.org> | 2022-03-22 11:57:09 -0700 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2022-04-05 10:24:35 +0200 |
| commit | ee042be16cb455116d0fe99b77c6bc8baf87c8c6 (patch) | |
| tree | d5de58e2f2882f0a433ab90a74d23fbee67aa7be /kernel/locking/mutex.c | |
| parent | locking: Add lock contention tracepoints (diff) | |
| download | linux-dev-ee042be16cb455116d0fe99b77c6bc8baf87c8c6.tar.xz linux-dev-ee042be16cb455116d0fe99b77c6bc8baf87c8c6.zip | |
locking: Apply contention tracepoints in the slow path
Adding the lock contention tracepoints in various lock function slow
paths. Note that each arch can define spinlock differently, I only
added it only to the generic qspinlock for now.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Link: https://lkml.kernel.org/r/20220322185709.141236-3-namhyung@kernel.org
Diffstat (limited to 'kernel/locking/mutex.c')
| -rw-r--r-- | kernel/locking/mutex.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index ee2fd7614a93..c88deda77cf2 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -644,6 +644,7 @@ __mutex_lock_common(struct mutex *lock, unsigned int state, unsigned int subclas } set_current_state(state); + trace_contention_begin(lock, 0); for (;;) { bool first; @@ -710,6 +711,7 @@ acquired: skip_wait: /* got the lock - cleanup and rejoice! */ lock_acquired(&lock->dep_map, ip); + trace_contention_end(lock, 0); if (ww_ctx) ww_mutex_lock_acquired(ww, ww_ctx); @@ -721,6 +723,7 @@ skip_wait: err: __set_current_state(TASK_RUNNING); __mutex_remove_waiter(lock, &waiter); + trace_contention_end(lock, ret); err_early_kill: raw_spin_unlock(&lock->wait_lock); debug_mutex_free_waiter(&waiter); |