linux-kernel - Re: [PATCH 0/4] sched/rt: Distribute tasks in find_lowest

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Message-ID: <jhjftd5vl9w.mognet@arm.com>
Date:   Tue, 14 Apr 2020 21:56:43 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Qais Yousef <qais.yousef@....com>, 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>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Yury Norov <yury.norov@...il.com>,
        Paul Turner <pjt@...gle.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Josh Don <joshdon@...gle.com>,
        Pavan Kondeti <pkondeti@...eaurora.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] sched/rt: Distribute tasks in find_lowest_rq()


On 14/04/20 21:27, Steven Rostedt wrote:
> On Tue, 14 Apr 2020 19:58:49 +0100
> Valentin Schneider <valentin.schneider@....com> wrote:
>
>> To move this forward, I would suggest renaming the current cpumask_any_*()
>> into cpumask_first_*(), and THEN introduce the new pseudo-random
>> ones. People are then free to hand-fix specific locations if it makes sense
>> there, like you're doing for RT.
>
> Or leave "cpumask_any()" as is, and create a new "cpumask_random()" for
> this purpose.
>

Sure; I'll be happy as long as there isn't a blanket replacement of
existing callsites.

> -- Steve