linux-kernel - Re: [RFC PATCH v2 08/17] cgroup: Move debug cgroup to its own file

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Message-ID: <20170517213603.GE942@htj.duckdns.org>
Date:   Wed, 17 May 2017 17:36:03 -0400
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <longman@...hat.com>
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 08/17] cgroup: Move debug cgroup to its own file

Hello, Waiman.

On Mon, May 15, 2017 at 09:34:07AM -0400, Waiman Long wrote:
> The debug cgroup currently resides within cgroup-v1.c and is enabled
> only for v1 cgroup. To enable the debug cgroup also for v2, it
> makes sense to put the code into its own file as it will no longer
> be v1 specific. The only change in this patch is the expansion of
> cgroup_task_count() within the debug_taskcount_read() function.
> 
> Signed-off-by: Waiman Long <longman@...hat.com>

I don't mind enabling the debug controller for v2 but let's please
hide it behind an unwieldy boot param / controller name so that it's
clear that its interface isn't expected to be stable.

Thanks.

-- 
tejun