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workqueue: fix worker management invocation without pending works 

When there's no pending work to do, worker_thread() goes back to sleep
after waking up without checking whether worker management is
necessary.  This means that idle worker exit requests can be ignored
if the gcwq stays empty.

Fix it by making worker_thread() always check whether worker
management is necessary before going to sleep.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2010-07-02 10:03:51 +02:00
parent a1e453d279
commit d313dd85ad
1 changed files with 2 additions and 2 deletions
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4
kernel/workqueue.c
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@ -1832,10 +1832,10 @@ static int worker_thread(void *__worker)
} while (keep_working(gcwq));
worker_set_flags(worker, WORKER_PREP, false);
sleep:
if (unlikely(need_to_manage_workers(gcwq)) && manage_workers(worker))
goto recheck;
sleep:
/*
* gcwq->lock is held and there's no work to process and no
* need to manage, sleep. Workers are woken up only while