linux-kernel - Re: [PATCH v14 12/12] cpuset: Show descriptive text when reading cpuset.sched.partition

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Message-ID: <bd198f0c-e5b9-13f1-ffe2-05414d0b392f@redhat.com>
Date:   Fri, 2 Nov 2018 10:34:21 -0400
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 v14 12/12] cpuset: Show descriptive text when reading
 cpuset.sched.partition

On 10/19/2018 03:24 PM, Tejun Heo wrote:
> On Fri, Oct 19, 2018 at 02:56:13PM -0400, Waiman Long wrote:
>> On 10/17/2018 11:08 AM, Tejun Heo wrote:
>>> On Mon, Oct 15, 2018 at 04:29:37PM -0400, Waiman Long wrote:
>>>> Currently, cpuset.sched.partition returns the values, 0, 1 or -1 on
>>>> read. A person who is not familiar with the partition code may not
>>>> understand what they mean.
>>>>
>>>> In order to make cpuset.sched.partition more user-friendly, it will
>>>> now display the following descriptive text on read:
>>>>
>>>>   "normal" - A normal cpuset, not a partition root
>>>>   "partition" - A partition root
>>>>   "partition invalid" - An invalid partition root
>>>>
>>>> Suggested-by: Tejun Heo <tj@...nel.org>
>>>> Signed-off-by: Waiman Long <longman@...hat.com>
>>> Can you also make this consistent when writing to the file?
>>>
>>> Thanks.
>>>
>> How about the attached patch instead?
> Looks good to me.  Once Peter is okay with it, I'll roll it into
> cgroup devel branch.  As v4.19 is almost done, I think it makes more
> sense to target the next merge window (v4.21).
>
> Thanks.
>
Peter, are you OK with the current cpuset v2 patch which does allow
hierarchical partitions as you have requested?

Cheers,
Longman