From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH] cgroup: Show control files in cgroup2 root after mount
Date: Tue, 18 Jul 2017 17:06:58 -0400
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To: Waiman Long <longman@redhat.com>
Cc: Li Zefan <lizefan@huawei.com>, Johannes Weiner <hannes@cmpxchg.org>, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org

On Tue, Jul 18, 2017 at 04:50:10PM -0400, Tejun Heo wrote:
> Heh, I'm really confused.  If I do the same thing, I get the following
> result which makes sense as the files would be activated in
> cgroup_apply_cftypes() when the debug controller is registered during
> boot.
> 
>  # mkdir /cgroup2
>  # mount -t cgroup2 cgroup2 /cgroup2
>  # ls /cgroup2/
>  cgroup.controllers      debug.current_css_set
>  cgroup.procs            debug.current_css_set_cg_links
>  cgroup.subtree_control  debug.current_css_set_refcount
>  cgroup.threads          debug.masks
>  debug.csses             debug.taskcount
>  debug.css_links

Never mind.  I can repro after getting rid of some automatic umounts
from rc.local.  Will find out what went wrong.

Thanks!

-- 
tejun