Commit-ID: 857811a37129f5d2ba162d7be3986eff44724014 Gitweb: http://git.kernel.org/tip/857811a37129f5d2ba162d7be3986eff44724014 Author: Boqun Feng <boqun.f...@gmail.com> AuthorDate: Wed, 1 Mar 2017 23:01:38 +0800 Committer: Ingo Molnar <mi...@kernel.org> 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 <boqun.f...@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Cc: Andrew Morton <a...@linux-foundation.org> Cc: Chris Wilson <ch...@chris-wilson.co.uk> Cc: Fengguang Wu <fengguang...@intel.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Nicolai Hähnle <nicolai.haeh...@amd.com> Cc: Paul E. McKenney <paul...@linux.vnet.ibm.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/20170301150138.hdixnmafzfsox...@tardis.cn.ibm.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- 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;
