linux-kernel - Re: [PATCHv4 00/12] sched/fair: Migrate 'misfit' tasks on asymmetric capacity systems

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Message-ID: <e9ebcee9-52e4-450e-7814-c8187e2b4fb5@arm.com>
Date:   Tue, 31 Jul 2018 13:10:49 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Morten Rasmussen <morten.rasmussen@....com>
Cc:     mingo@...hat.com, dietmar.eggemann@....com,
        vincent.guittot@...aro.org, gaku.inami.xh@...esas.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCHv4 00/12] sched/fair: Migrate 'misfit' tasks on asymmetric
 capacity systems

Hi Peter,

On 31/07/18 13:00, Peter Zijlstra wrote:
> 
> 
> Aside from the first patch, which I posted the change on, I've picked up
> until 10. I think that other SD_ASYM patch-set replaces 11 and 12,
> right?
>
11 is no longer needed, but AFAICT we still need 12 - we don't want
PREFER_SIBLING to interfere with asymmetric systems.

Also, I've been playing around with a patch to modify 5 (the nohz kicks) that
first scans the capacity of nohz CPUs before doing any kick (pretty much like
what asym packing is doing with nohz CPU priority), do you want me to toss
it your way? I haven't done run any tests with it yet...

Cheers,
Valentin