linux-kernel - Re: [PATCH v14 00/12] Enable cpuset controller in default hierarchy

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Message-ID: <20181107213229.GB2509588@devbig004.ftw2.facebook.com>
Date:   Wed, 7 Nov 2018 13:32:29 -0800
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.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>,
        Patrick Bellasi <patrick.bellasi@....com>,
        Tom Hromatka <tom.hromatka@...cle.com>
Subject: Re: [PATCH v14 00/12] Enable cpuset controller in default hierarchy

Hello,

On Tue, Nov 06, 2018 at 09:06:01AM -0500, Waiman Long wrote:
> On 11/06/2018 06:55 AM, Peter Zijlstra wrote:
> > On Tue, Nov 06, 2018 at 12:53:35PM +0100, Peter Zijlstra wrote:
> >> On Mon, Nov 05, 2018 at 08:36:56AM -0800, Tejun Heo wrote:
> >>> Hello,
> >>>
> >>> So, this looks good to me.  Peter, I'm gonna roll the series into
> >>> cgroup/for-4.21-cpuset.  Please holler if you have any objections /
> >>> comments.
> >> Mostly nits, except I think the interface for cpuset.sched.partition
> >> needs to find another term for "not a parition", "normal" really doesn't
> >> work for me.
> > cpuset.sched.partition: "true", "false", "error"
> >
> > makes more sense to me.
> 
> The terms "true", "false", "error" look good to me. I can change the
> patchset to use those if Tejun has no objection. I will fix the other
> nits you have as well.

How about the following?

Interface file is named "cpuset.cpus.partition" as it's a partition of
cpus.  The writeable keys are "root" and "member" - a partition root
and a partition member.  When "root" is requested but can't be
satisfied it shows "root invalid".  This seems pretty consistent with
cgroup.type and other cpuset files.

Thanks.

-- 
tejun