linux-kernel - Re: [RFC PATCH 2/4] sched/fair: Introduce cfs

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Message-ID: <CALOAHbDkeOC0LWpSTmn-vXiftxqFatPFwfuFqzU6i86Z8xoFbQ@mail.gmail.com>
Date:   Wed, 10 Nov 2021 22:17:20 +0800
From:   Yafang Shao <laoar.shao@...il.com>
To:     Valentin Schneider <valentin.schneider@....com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Benjamin Segall <bsegall@...gle.com>,
        Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 2/4] sched/fair: Introduce cfs_migration

On Tue, Nov 9, 2021 at 6:47 PM Valentin Schneider
<valentin.schneider@....com> wrote:
>
> On 06/11/21 15:40, Yafang Shao wrote:
> > It seems we'd better take the patch[1] I sent several weeks back.
> >
> > [1]. https://lore.kernel.org/lkml/20210615121551.31138-1-laoar.shao@gmail.com/
> >
>
> As Peter stated in that thread, this only reduces the race window and
> doesn't eliminate it. The FIFO-1 smpboot idea is still a good one IMO.
>

Of course.
I will think about how to avoid the migration happening in the smpboot
thread_fn.

-- 
Thanks
Yafang