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| author |   Boqun Feng <boqun.feng@gmail.com> | 2017-03-01 23:01:38 +0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2017-03-02 09:00:39 +0100 |
| commit | 857811a37129f5d2ba162d7be3986eff44724014 (patch) | |
| tree | 809e6549df40d37318d2fe625a0b096836546dad /kernel | |
| parent | locking/lockdep: Add nest_lock integrity test (diff) | |
| download | linux-dev-857811a37129f5d2ba162d7be3986eff44724014.tar.xz linux-dev-857811a37129f5d2ba162d7be3986eff44724014.zip | |
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.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c index 3eb39c588397..6b7abb334ca6 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; |