linux-kernel - Re: [RFC PATCH v2 10/17] cgroup: Make debug cgroup support v2 and thread mode

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Message-ID: <3cb18ea6-fcc1-af92-3926-d65ae0a30b97@redhat.com>
Date:   Thu, 18 May 2017 11:58:41 -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,
        linux-mm@...ck.org, kernel-team@...com, pjt@...gle.com,
        luto@...capital.net, efault@....de
Subject: Re: [RFC PATCH v2 10/17] cgroup: Make debug cgroup support v2 and
 thread mode

On 05/17/2017 05:43 PM, Tejun Heo wrote:
> Hello,
>
> On Mon, May 15, 2017 at 09:34:09AM -0400, Waiman Long wrote:
>> Besides supporting cgroup v2 and thread mode, the following changes
>> are also made:
>>  1) current_* cgroup files now resides only at the root as we don't
>>     need duplicated files of the same function all over the cgroup
>>     hierarchy.
>>  2) The cgroup_css_links_read() function is modified to report
>>     the number of tasks that are skipped because of overflow.
>>  3) The relationship between proc_cset and threaded_csets are displayed.
>>  4) The number of extra unaccounted references are displayed.
>>  5) The status of being a thread root or threaded cgroup is displayed.
>>  6) The current_css_set_read() function now prints out the addresses of
>>     the css'es associated with the current css_set.
>>  7) A new cgroup_subsys_states file is added to display the css objects
>>     associated with a cgroup.
>>  8) A new cgroup_masks file is added to display the various controller
>>     bit masks in the cgroup.
>>
>> Signed-off-by: Waiman Long <longman@...hat.com>
> As noted before, please make it clear that this is a debug feature and
> not expected to be stable.  Also, I don't see why this and the
> previous two patches are in this series.  Can you please split these
> out to a separate patchset?
>
> Thanks.
>
Sure. I can separate out the debug code into a separate patchset. It is
just easier to manage as a single patchset than 2 separate ones.

Regards,
Longman