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workqueue: Link pwq's into wq->pwqs from oldest to newest

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Add a new pwq into the tail of wq->pwqs so that pwq iteration will
start from the oldest pwq to the newest. This ordering will facilitate
the inclusion of ordered workqueues in a wq_unbound_cpumask update.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Waiman Long 2024-02-08 11:10:11 -05:00 committed by Tejun Heo
parent 40911d4457
commit 26fb7e3dda
1 changed files with 1 additions and 1 deletions
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2
kernel/workqueue.c
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@ -4804,7 +4804,7 @@ static void link_pwq(struct pool_workqueue *pwq)
pwq->work_color = wq->work_color;
/* link in @pwq */
list_add_rcu(&pwq->pwqs_node, &wq->pwqs);
list_add_tail_rcu(&pwq->pwqs_node, &wq->pwqs);
}
/* obtain a pool matching @attr and create a pwq associating the pool and @wq */