From: Waiman Long <longman@redhat.com>
To: Tejun Heo <tj@kernel.org>, Lai Jiangshan <jiangshanlai@gmail.com>
Cc: linux-kernel@vger.kernel.org, Juri Lelli <juri.lelli@redhat.com>,
Cestmir Kalina <ckalina@redhat.com>,
Alex Gladkov <agladkov@redhat.com>, Phil Auld <pauld@redhat.com>,
Costa Shulyupin <cshulyup@redhat.com>,
Waiman Long <longman@redhat.com>
Subject: [PATCH-wq v2 1/5] workqueue: Skip __WQ_DESTROYING workqueues when updating global unbound cpumask
Date: Sat, 3 Feb 2024 10:43:30 -0500 [thread overview]
Message-ID: <20240203154334.791910-2-longman@redhat.com> (raw)
In-Reply-To: <20240203154334.791910-1-longman@redhat.com>
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>
---
kernel/workqueue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index ffb625db9771..7ef393f4012e 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -6313,7 +6313,7 @@ static int workqueue_apply_unbound_cpumask(const cpumask_var_t unbound_cpumask)
lockdep_assert_held(&wq_pool_mutex);
list_for_each_entry(wq, &workqueues, list) {
- if (!(wq->flags & WQ_UNBOUND))
+ if (!(wq->flags & WQ_UNBOUND) || (wq->flags & __WQ_DESTROYING))
continue;
/* creating multiple pwqs breaks ordering guarantee */
--
2.39.3
next prev parent reply other threads:[~2024-02-03 15:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-03 15:43 [PATCH-wq v2 0/5] workqueue: Enable unbound cpumask update on ordered workqueues Waiman Long
2024-02-03 15:43 ` Waiman Long [this message]
2024-02-05 18:00 ` [PATCH-wq v2 1/5] workqueue: Skip __WQ_DESTROYING workqueues when updating global unbound cpumask Tejun Heo
2024-02-03 15:43 ` [PATCH-wq v2 2/5] workqueue: Enable unbound cpumask update on ordered workqueues Waiman Long
2024-02-05 19:23 ` Tejun Heo
2024-02-03 15:43 ` [PATCH-wq v2 3/5] workqueue: Thaw frozen pwq in workqueue_apply_unbound_cpumask() Waiman Long
2024-02-04 10:15 ` kernel test robot
2024-02-04 16:07 ` Waiman Long
2024-02-03 15:43 ` [PATCH-wq v2 4/5] kernel/workqueue: Let rescuers follow unbound wq cpumask changes Waiman Long
2024-02-03 15:43 ` [PATCH-wq v2 5/5] workqueue: Bind unbound workqueue rescuer to wq_unbound_cpumask Waiman Long
2024-02-05 9:48 ` [PATCH-wq v2 0/5] workqueue: Enable unbound cpumask update on ordered workqueues Juri Lelli
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