diff options
| author | Davidlohr Bueso <dave@stgolabs.net> | 2014-09-29 06:14:25 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-09-30 00:10:02 -0700 |
| commit | a1229491006a3d55cc0d7e6d496be39915ccefdd (patch) | |
| tree | fec585adeb011833630c936148f4cf722d62e96d /kernel/locking | |
| parent | 219f800f99db6f4e43a582cb9e0d98931f13c012 (diff) | |
| download | lwn-a1229491006a3d55cc0d7e6d496be39915ccefdd.tar.gz lwn-a1229491006a3d55cc0d7e6d496be39915ccefdd.zip | |
locktorture: Cannot hold read and write lock
... trigger an error if so.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/locking')
| -rw-r--r-- | kernel/locking/locktorture.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c index 9e9cd111fb0f..b05dc46c4297 100644 --- a/kernel/locking/locktorture.c +++ b/kernel/locking/locktorture.c @@ -453,14 +453,19 @@ static int lock_torture_writer(void *arg) do { if ((torture_random(&rand) & 0xfffff) == 0) schedule_timeout_uninterruptible(1); + cxt.cur_ops->writelock(); if (WARN_ON_ONCE(lock_is_write_held)) lwsp->n_lock_fail++; lock_is_write_held = 1; + if (WARN_ON_ONCE(lock_is_read_held)) + lwsp->n_lock_fail++; /* rare, but... */ + lwsp->n_lock_acquired++; cxt.cur_ops->write_delay(&rand); lock_is_write_held = 0; cxt.cur_ops->writeunlock(); + stutter_wait("lock_torture_writer"); } while (!torture_must_stop()); torture_kthread_stopping("lock_torture_writer"); @@ -482,12 +487,17 @@ static int lock_torture_reader(void *arg) do { if ((torture_random(&rand) & 0xfffff) == 0) schedule_timeout_uninterruptible(1); + cxt.cur_ops->readlock(); lock_is_read_held = 1; + if (WARN_ON_ONCE(lock_is_write_held)) + lrsp->n_lock_fail++; /* rare, but... */ + lrsp->n_lock_acquired++; cxt.cur_ops->read_delay(&rand); lock_is_read_held = 0; cxt.cur_ops->readunlock(); + stutter_wait("lock_torture_reader"); } while (!torture_must_stop()); torture_kthread_stopping("lock_torture_reader"); |