From: Aaron Tomlin <atomlin@atomlin.com>
To: tj@kernel.org
Cc: peterz@infradead.org, atomlin@atomlin.com,
jiangshanlai@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 0/2] workqueue: Introduce PF_WQ_RESCUE_WORKER
Date: Tue, 1 Aug 2023 11:53:01 +0100 [thread overview]
Message-ID: <20230801105301.952042-1-atomlin@atomlin.com> (raw)
In-Reply-To: <ZMhFUbL42Ycyc2tI@slm.duckdns.org>
> You really shouldn't be setting affinities on kworkers manually. There's
> no way of knowing which kworker is going to execute which workqueue.
> Please use the attributes API and sysfs interface to modify per-workqueue
> worker attributes. If that's not sufficient and you need finer grained
> control, the right thing to do is using kthread_worker which gives you a
> dedicated kthread that you can manipulate as appropriate.
Hi Tejun,
I completely agree. Each kworker has PF_NO_SETAFFINITY applied anyway.
If I understand correctly, only an unbound kworker can have their CPU
affinity modified via sysfs. The objective of this series was to easily
identify a rescuer kworker from user-mode.
Kind regards,
--
Aaron Tomlin
next prev parent reply other threads:[~2023-08-01 11:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-29 13:53 [RFC PATCH 0/2] workqueue: Introduce PF_WQ_RESCUE_WORKER Aaron Tomlin
2023-07-29 13:53 ` [RFC PATCH 1/2] " Aaron Tomlin
2023-07-29 16:07 ` Peter Zijlstra
2023-08-01 10:04 ` Aaron Tomlin
2023-07-29 13:53 ` [RFC PATCH 2/2] workqueue: Simplify current_is_workqueue_rescuer() Aaron Tomlin
2023-07-31 23:35 ` [RFC PATCH 0/2] workqueue: Introduce PF_WQ_RESCUE_WORKER Tejun Heo
2023-08-01 10:53 ` Aaron Tomlin [this message]
2023-08-02 18:10 ` Tejun Heo
2023-08-03 20:19 ` Aaron Tomlin
2023-08-03 20:34 ` Tejun Heo
2023-08-05 23:45 ` Aaron Tomlin
2023-12-11 14:51 ` Juri Lelli
2023-12-11 18:39 ` Tejun Heo
2023-12-12 9:56 ` Juri Lelli
2023-12-12 17:14 ` Tejun Heo
2023-12-12 19:06 ` Aaron Tomlin
2023-12-12 20:16 ` Tejun Heo
2023-12-13 8:59 ` Juri Lelli
2023-12-13 15:35 ` Tejun Heo
2023-12-13 18:32 ` Juri Lelli
2023-12-13 18:38 ` Tejun Heo
2023-12-14 11:25 ` Juri Lelli
2023-12-14 19:47 ` Tejun Heo
2023-12-15 6:50 ` Juri Lelli
2023-12-19 8:55 ` Juri Lelli
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