Commit-ID: 857811a37129f5d2ba162d7be3986eff44724014 Gitweb: http://git.kernel.org/tip/857811a37129f5d2ba162d7be3986eff44724014 Author: Boqun Feng <[email protected]> AuthorDate: Wed, 1 Mar 2017 23:01:38 +0800 Committer: Ingo Molnar <[email protected]> CommitDate: Thu, 2 Mar 2017 09:00:39 +0100
locking/ww_mutex: Adjust the lock number for stress test Because there are only 12 bits in held_lock::references, so we only support 4095 nested lock held in the same time, adjust the lock number for ww_mutex stress test to kill one lockdep splat: [ ] [ BUG: bad unlock balance detected! ] [ ] kworker/u2:0/5 is trying to release lock (ww_class_mutex) at: [ ] ww_mutex_unlock() [ ] but there are no more locks to release! ... Signed-off-by: Boqun Feng <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Chris Wilson <[email protected]> Cc: Fengguang Wu <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Nicolai Hähnle <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- kernel/locking/test-ww_mutex.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c index 3eb39c5..6b7abb3 100644 --- a/kernel/locking/test-ww_mutex.c +++ b/kernel/locking/test-ww_mutex.c @@ -627,7 +627,7 @@ static int __init test_ww_mutex_init(void) if (ret) return ret; - ret = stress(4096, hweight32(STRESS_ALL)*ncpus, 1<<12, STRESS_ALL); + ret = stress(4095, hweight32(STRESS_ALL)*ncpus, 1<<12, STRESS_ALL); if (ret) return ret;
