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Because taskqueue_run() can drop tq_mutex, we need to check if the

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TQ_FLAGS_ACTIVE flag wasn't removed in the meantime, which means we missed a
wakeup.

Approved by:	re (kib)
This commit is contained in:
Pawel Jakub Dawidek 2009-08-17 08:42:34 +00:00
parent fddc954016
commit 6a3b289388
1 changed files with 7 additions and 0 deletions
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7
sys/kern/subr_taskqueue.c
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@ -401,6 +401,13 @@ taskqueue_thread_loop(void *arg)
TQ_LOCK(tq);
while ((tq->tq_flags & TQ_FLAGS_ACTIVE) != 0) {
taskqueue_run(tq);
/*
* Because taskqueue_run() can drop tq_mutex, we need to
* check if the TQ_FLAGS_ACTIVE flag wasn't removed in the
* meantime, which means we missed a wakeup.
*/
if ((tq->tq_flags & TQ_FLAGS_ACTIVE) == 0)
break;
TQ_SLEEP(tq, tq, &tq->tq_mutex, 0, "-", 0);
}