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| author | Tejun Heo <[email protected]> | 2010-08-24 12:22:47 +0000 |
|---|---|---|
| committer | Tejun Heo <[email protected]> | 2010-08-24 16:01:32 +0000 |
| commit | e41e704bc4f49057fc68b643108366e6e6781aa3 (patch) | |
| tree | 8cc85208970ba0c9adf533903243e28c506f23ae /net/unix/af_unix.c | |
| parent | workqueue: mark lock acquisition on worker_maybe_bind_and_lock() (diff) | |
| download | kernel-e41e704bc4f49057fc68b643108366e6e6781aa3.tar.gz kernel-e41e704bc4f49057fc68b643108366e6e6781aa3.zip | |
workqueue: improve destroy_workqueue() debuggability
Now that the worklist is global, having works pending after wq
destruction can easily lead to oops and destroy_workqueue() have
several BUG_ON()s to catch these cases. Unfortunately, BUG_ON()
doesn't tell much about how the work became pending after the final
flush_workqueue().
This patch adds WQ_DYING which is set before the final flush begins.
If a work is requested to be queued on a dying workqueue,
WARN_ON_ONCE() is triggered and the request is ignored. This clearly
indicates which caller is trying to queue a work on a dying workqueue
and keeps the system working in most cases.
Locking rule comment is updated such that the 'I' rule includes
modifying the field from destruction path.
Signed-off-by: Tejun Heo <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions