diff options
author | Tejun Heo <tj@kernel.org> | 2010-08-24 14:22:47 +0200 |
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committer | Tejun Heo <tj@kernel.org> | 2010-08-24 18:01:32 +0200 |
commit | e41e704bc4f49057fc68b643108366e6e6781aa3 (patch) | |
tree | 8cc85208970ba0c9adf533903243e28c506f23ae /include/linux/sc26198.h | |
parent | 972fa1c5316d18c8297123e08e9b6930ca34f888 (diff) |
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 <tj@kernel.org>
Diffstat (limited to 'include/linux/sc26198.h')
0 files changed, 0 insertions, 0 deletions