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

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Message-ID: <cbaf57d2-91bc-cce6-de9e-6e0e39f44794@bytedance.com>
Date:   Wed, 16 Nov 2022 16:48:40 +0800
From:   Hao Jia <jiahao.os@...edance.com>
To:     Mel Gorman <mgorman@...hsingularity.net>
Cc:     mingo@...hat.com, peterz@...radead.org, mingo@...nel.org,
        juri.lelli@...hat.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, vschneid@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [External] Re: [PATCH v2 2/2] sched/core: Adjusting the order of
 scanning CPU



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>
> 

Thanks for your review and feedback.

Thanks,
Hao