linux-kernel - Re: [PATCH] workqueue: Add WQ_SCHED

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Message-ID: <CAB=BE-Q9jtJnqPwGzSTQ6-soZ9STvqAebeONy=Eyo08H+eg-rQ@mail.gmail.com>
Date:   Wed, 18 Jan 2023 10:22:32 -0800
From:   Sandeep Dhavale <dhavale@...gle.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     Nathan Huckleberry <nhuck@...gle.com>,
        Daeho Jeong <daehojeong@...gle.com>,
        Eric Biggers <ebiggers@...nel.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] workqueue: Add WQ_SCHED_FIFO

On Wed, Jan 18, 2023 at 9:52 AM Tejun Heo <tj@...nel.org> wrote:
>
> On Sat, Jan 14, 2023 at 01:00:00PM -0800, Nathan Huckleberry wrote:
> > This sounds fine to me. How do you feel about a config flag to change
> > the default WQ_HIGHPRI scheduler policy and a sysfs node to update the
> > policy per workqueue?
>
> Yeah, sounds fine to me.
>
> Thanks.
>
Hi Tejun,
If with the kernel config option, every WQ_HIGHPRI is elevated to
sched_fifo_low, wouldn't that be kind of defeating the purpose? Having
another class for even more urgent work is better in my opinion.

Thanks,
Sandeep.
> --
> tejun