linux-kernel - Re: [PATCH] sched: cgroup SCHED

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Message-ID: <CABk29Ntv_BhG3veC1KdFEoaZ4UWohKAO5GdxoaVD+iOmMGw1_Q@mail.gmail.com>
Date:   Fri, 25 Jun 2021 17:18:05 -0700
From:   Josh Don <joshdon@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Paul Turner <pjt@...gle.com>,
        David Rientjes <rientjes@...gle.com>,
        Oleg Rombakh <olegrom@...gle.com>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Steve Sistare <steven.sistare@...cle.com>,
        Tejun Heo <tj@...nel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sched: cgroup SCHED_IDLE support

On Fri, Jun 25, 2021 at 1:15 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> You should probably also make cpu_weight_*write_?64() return -EINVAL when
> IDLE. Similar to how SCHED_IDLE doesn't do nice.

sched_group_set_shares() returns -EINVAL when called on an idle group.