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lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex

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Call the new lockstat tracking functions from the various lock primitives.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Zijlstra
2007-07-19 01:48:58 -07:00
committed by Linus Torvalds
parent c46261de0d
commit 4fe87745a6
3 changed files with 26 additions and 18 deletions
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8
kernel/mutex.c
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@@ -139,6 +139,12 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass)
list_add_tail(&waiter.list, &lock->wait_list);
waiter.task = task;
old_val = atomic_xchg(&lock->count, -1);
if (old_val == 1)
goto done;
lock_contended(&lock->dep_map, _RET_IP_);
for (;;) {
/*
* Lets try to take the lock again - this is needed even if
@@ -174,6 +180,8 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass)
spin_lock_mutex(&lock->wait_lock, flags);
}
lock_acquired(&lock->dep_map);
done:
/* got the lock - rejoice! */
mutex_remove_waiter(lock, &waiter, task_thread_info(task));
debug_mutex_set_owner(lock, task_thread_info(task));