linux-kernel - Re: [PATCH 7/8] sched/fair: Attempt misfit active balance when migration_type != migrate

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Message-ID: <jhjk0rp2drv.mognet@arm.com>
Date:   Wed, 03 Feb 2021 18:43:16 +0000
From:   Valentin Schneider <valentin.schneider@....com>
To:     Qais Yousef <qais.yousef@....com>
Cc:     linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Quentin Perret <qperret@...gle.com>,
        Pavan Kondeti <pkondeti@...eaurora.org>,
        Rik van Riel <riel@...riel.com>
Subject: Re: [PATCH 7/8] sched/fair: Attempt misfit active balance when migration_type != migrate_misfit

On 03/02/21 15:16, Qais Yousef wrote:
> On 01/28/21 18:31, Valentin Schneider wrote:
>> Giving group_misfit_task a higher group_classify() priority than
>> group_imbalance doesn't seem like the right thing to do. Instead, make
>> need_active_balance() return true for any migration_type when the
>
> s/need_active_balance()/voluntary_active_balance()/?
>
>> destination CPU is idle and the source CPU has a misfit task.
>> 
>> While at it, add an sd_has_asym_cpucapacity() guard in
>> need_active_balance().
>
> ditto.
>

Myes, clearly this has been left to ferment for too long!