linux-kernel - Re: [PATCH v15 12/12] cpuset: Expose cpuset.cpus.subpartitions with cgroup

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Message-ID: <5e3df063-251b-b6e0-fbc5-25e7a8b6efb5@redhat.com>
Date:   Thu, 8 Nov 2018 13:59:43 -0500
From:   Waiman Long <longman@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Tejun Heo <tj@...nel.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 v15 12/12] cpuset: Expose cpuset.cpus.subpartitions with
 cgroup_debug

On 11/08/2018 10:46 AM, Peter Zijlstra wrote:
> On Thu, Nov 08, 2018 at 10:08:46AM -0500, Waiman Long wrote:
>> For debugging purpose, it will be useful to expose the content of the
>> subparts_cpus as a read-only file to see if the code work correctly.
>> However, subparts_cpus will not be used at all in most use cases. So
>> adding a new cpuset file that clutters the cgroup directory may not be
>> desirable.  This is now being done by using the hidden "cgroup_debug"
>> kernel command line option to expose a new "cpuset.cpus.subpartitions"
>> file.
> One thought I had; would it make sense to make these debug files hidden
> ("." prefix) ?


These debug files will only appear when the cgroup_debug command line
option is used. So I don't think we really need to add an extra "."
prefix as it will break the naming convention.

Cheers,
Longman