linux-kernel - Re: [External] Re: [PATCH v2 2/2] sched/core: Adjusting the order of scanning CPU

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Date:   Wed, 30 Nov 2022 08:59:56 +0100
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     Hao Jia <jiahao.os@...edance.com>
Cc:     Peter Zijlstra <peterz@...radead.org>, mingo@...hat.com,
        mingo@...nel.org, juri.lelli@...hat.com, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, vschneid@...hat.com,
        linux-kernel@...r.kernel.org,
        Mel Gorman <mgorman@...hsingularity.net>
Subject: Re: [External] Re: [PATCH v2 2/2] sched/core: Adjusting the order of
 scanning CPU

On Wed, 30 Nov 2022 at 07:35, Hao Jia <jiahao.os@...edance.com> wrote:
>
>
>
> On 2022/11/14 Mel Gorman wrote:
> > On Wed, Oct 26, 2022 at 02:43:00PM +0800, Hao Jia wrote:
> >> When select_idle_capacity() starts scanning for an idle CPU, it starts
> >> with target CPU that has already been checked in select_idle_sibling().
> >> So we start checking from the next CPU and try the target CPU at the end.
> >> Similarly for task_numa_assign(), we have just checked numa_migrate_on
> >> of dst_cpu, so start from the next CPU. This also works for
> >> steal_cookie_task(), the first scan must fail and start directly
> >> from the next one.
> >>
> >> Signed-off-by: Hao Jia <jiahao.os@...edance.com>
> >
> > Test results in general look ok so
> >
> > Acked-by: Mel Gorman <mgorman@...hsingularity.net>

Reviewed-by: Vincent Guittot <vincent.guittot@...aro.org>

> >
>
> Hi, Peter
> These two patches have been Acked-by Mel Gorman.
> If you have time, please review these two patches.
>
> Thanks，
> Hao