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workqueue: Skip __WQ_DESTROYING workqueues when updating global unbound cpumask 

Skip updating workqueues with __WQ_DESTROYING bit set when updating
global unbound cpumask to avoid unnecessary work and other complications.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
pull/816/head
Waiman Long 2024-02-03 10:43:30 -05:00 committed by Tejun Heo
parent 96068b6030
commit 8eb17dc1a6
1 changed files with 1 additions and 1 deletions
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kernel/workqueue.c
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@ -6501,7 +6501,7 @@ static int workqueue_apply_unbound_cpumask(const cpumask_var_t unbound_cpumask)
lockdep_assert_held(&wq_pool_mutex); lockdep_assert_held(&wq_pool_mutex);
list_for_each_entry(wq, &workqueues, list) { list_for_each_entry(wq, &workqueues, list) {
if (!(wq->flags & WQ_UNBOUND)) if (!(wq->flags & WQ_UNBOUND) || (wq->flags & __WQ_DESTROYING))
continue; continue;
/* creating multiple pwqs breaks ordering guarantee */ /* creating multiple pwqs breaks ordering guarantee */