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authorBoqun Feng <boqun.feng@gmail.com>2017-03-01 23:01:38 +0800
committerIngo Molnar <mingo@kernel.org>2017-03-02 09:00:39 +0100
commit857811a37129f5d2ba162d7be3986eff44724014 (patch)
tree809e6549df40d37318d2fe625a0b096836546dad /kernel
parent7fb4a2cea6b18dab56d609530d077f168169ed6b (diff)
downloadop-kernel-dev-857811a37129f5d2ba162d7be3986eff44724014.zip
op-kernel-dev-857811a37129f5d2ba162d7be3986eff44724014.tar.gz
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.feng@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nicolai Hähnle <Nicolai.Haehnle@amd.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170301150138.hdixnmafzfsox7nn@tardis.cn.ibm.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/locking/test-ww_mutex.c2
1 files changed, 1 insertions, 1 deletions
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;
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