From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH RFC 1/3] cgroup: list all subsystem states in debugfs
 files
Date: Mon, 13 Aug 2018 06:48:42 -0700
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To: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, Michal Hocko <mhocko@kernel.org>, Vladimir Davydov <vdavydov.dev@gmail.com>, Roman Gushchin <guro@fb.com>, Johannes Weiner <hannes@cmpxchg.org>

Hello, Konstantin.

On Mon, Aug 13, 2018 at 09:58:05AM +0300, Konstantin Khlebnikov wrote:
> After removing cgroup subsystem state could leak or live in background
> forever because it is pinned by some reference. For example memory cgroup
> could be pinned by pages in cache or tmpfs.
> 
> This patch adds common debugfs interface for listing basic state for each
> controller. Controller could define callback for dumping own attributes.
> 
> In file /sys/kernel/debug/cgroup/<controller> each line shows state in
> format: <common_attr>=<value>... [-- <controller_attr>=<value>... ]

Seems pretty useful to me.  Roman, Johannes, what do you guys think?

Thanks.

-- 
tejun