From: Tejun Heo <tj@kernel.org>
To: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Valentin Schneider <vschneid@redhat.com>,
linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <frederic@kernel.org>,
Juri Lelli <juri.lelli@redhat.com>, Phil Auld <pauld@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: [RFC PATCH v3 1/3] workqueue: Hold wq_pool_mutex while affining tasks to wq_unbound_cpumask
Date: Mon, 15 Aug 2022 13:50:54 -1000 [thread overview]
Message-ID: <Yvrb3hfZuUzSpX5e@slm.duckdns.org> (raw)
In-Reply-To: <c13c3fb4-4936-a5fd-cd28-1136d07d5f54@gmail.com>
On Wed, Aug 03, 2022 at 11:40:28AM +0800, Lai Jiangshan wrote:
> From df7b4672db4dfd3e480b1873b9d346e8a7dfc69f Mon Sep 17 00:00:00 2001
> From: Lai Jiangshan <jiangshan.ljs@antgroup.com>
> Date: Wed, 3 Aug 2022 10:52:04 +0800
> Subject: [PATCH] workqueue: Protects wq_unbound_cpumask with
> wq_pool_attach_mutex
>
> When unbind_workers() reads wq_unbound_cpumask to set the affinity of
> freshly-unbound kworkers, it only holds wq_pool_attach_mutex. This isn't
> sufficient as wq_unbound_cpumask is only protected by wq_pool_mutex.
>
> Make wq_unbound_cpumask protected with wq_pool_attach_mutex and also
> remove the need of temporary saved_cpumask.
>
> Fixes: 10a5a651e3af ("workqueue: Restrict kworker in the offline CPU pool running on housekeeping CPUs")
> Reported-by: Valentin Schneider <vschneid@redhat.com>
> Signed-off-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
This patch looks fine to me but is whitespace corrupted (two leading spaces
on all context lines). Can you please resend?
Thanks.
--
tejun
next prev parent reply other threads:[~2022-08-16 3:24 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-02 8:41 [RFC PATCH v3 0/3] workqueue: destroy_worker() vs isolated CPUs Valentin Schneider
2022-08-02 8:41 ` [RFC PATCH v3 1/3] workqueue: Hold wq_pool_mutex while affining tasks to wq_unbound_cpumask Valentin Schneider
2022-08-03 3:40 ` Lai Jiangshan
2022-08-04 11:40 ` Valentin Schneider
2022-08-05 2:43 ` Lai Jiangshan
2022-08-15 23:50 ` Tejun Heo [this message]
2022-08-18 14:33 ` [PATCH] workqueue: Protects wq_unbound_cpumask with wq_pool_attach_mutex Lai Jiangshan
2022-08-27 0:33 ` Tejun Heo
2022-08-30 9:32 ` Lai Jiangshan
2022-09-04 20:23 ` Tejun Heo
2022-08-30 14:16 ` [RFC PATCH v3 1/3] workqueue: Hold wq_pool_mutex while affining tasks to wq_unbound_cpumask Lai Jiangshan
2022-08-02 8:41 ` [RFC PATCH v3 2/3] workqueue: Unbind workers before sending them to exit() Valentin Schneider
2022-08-05 3:16 ` Lai Jiangshan
2022-08-05 16:47 ` Valentin Schneider
2022-08-02 8:41 ` [RFC PATCH v3 3/3] DEBUG-DO-NOT-MERGE: workqueue: kworker spawner Valentin Schneider
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