linux-kernel - Re: [RESEND PATCH v4 1/1] psi: stop relying on timer_pending for poll

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Message-ID: <CAJuCfpGkTPJXmdpygJu5b2Gm38G1F3yrFKXZ95r9HxpaFYakHQ@mail.gmail.com>
Date:   Fri, 21 Oct 2022 21:03:34 -0700
From:   Suren Baghdasaryan <surenb@...gle.com>
To:     Hillf Danton <hdanton@...a.com>
Cc:     peterz@...radead.org, hannes@...xchg.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH v4 1/1] psi: stop relying on timer_pending for
 poll_work rescheduling

On Fri, Oct 21, 2022 at 8:52 PM Hillf Danton <hdanton@...a.com> wrote:
>
> On 21 Oct 2022 12:54:16 -0700 Suren Baghdasaryan <surenb@...gle.com>
> > psi_poll_worker runs at a low FIFO priority to prevent normal tasks
> > from preempting PSI signal generation (see sched_set_fifo_low() call
> > inside psi_poll_worker()), so schedule_delayed_work() would not be
> > usable as is I think, since it uses normal priority system_wq.
>
> I missed FIFO and sorry for my noise.

No issues at all. I appreciate your input!

>
> Hillf