linux-kernel - Re: [PATCH v7 4/5] cpuset: Restrict load balancing off cpus to subset of cpus.isolated

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Message-ID: <c3064aa6-6114-95f2-6204-e80937f40a92@redhat.com>
Date:   Tue, 1 May 2018 17:31:05 -0400
From:   Waiman Long <longman@...hat.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        kernel-team@...com, pjt@...gle.com, luto@...capital.net,
        Mike Galbraith <efault@....de>, torvalds@...ux-foundation.org,
        Roman Gushchin <guro@...com>,
        Juri Lelli <juri.lelli@...hat.com>
Subject: Re: [PATCH v7 4/5] cpuset: Restrict load balancing off cpus to subset
 of cpus.isolated

On 05/01/2018 04:58 PM, Tejun Heo wrote:
> Hello,
>
> On Tue, May 01, 2018 at 04:33:45PM -0400, Waiman Long wrote:
>> I think that will work too. We currently don't have a flag to make a
>> file visible on first-level children only, but it shouldn't be hard to
>> make one.
> I think it'd be fine to make the flag file exist on all !root cgroups
> but only writable on the first level children.

Right. This flag will be inherited by child cgroups like the
sched_load_balance.

Cheers,
Longman