From mboxrd@z Thu Jan  1 00:00:00 1970
From: Roman Gushchin <guro@fb.com>
Subject: Re: cgroups(7): documenting /sys/kernel/cgroup files
Date: Wed, 10 Jan 2018 06:32:21 -0800
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To: Tejun Heo <tj@kernel.org>
Cc: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>, "Serge E. Hallyn" <serge@hallyn.com>, linux-man <linux-man@vger.kernel.org>, lkml <linux-kernel@vger.kernel.org>, "open list:CONTROL GROUP (CGROUP)" <cgroups@vger.kernel.org>

On Wed, Jan 10, 2018 at 06:02:39AM -0800, Tejun Heo wrote:
> Hello,
> 
> On Wed, Jan 10, 2018 at 04:44:14AM -0800, Roman Gushchin wrote:
> > cgroup.threads is not listed because it's not delegatable (doesn't have
> > CFTYPE_NS_DELEGATABLE flag set). I don't know if it was intended or just
> > an accident (I believe the latter).
> 
> So, thread mode isn't delegatble.  Marking a cgroup as threaded turns
> that subtree threaded and join the parent's domain, so we can't allow
> delegation roots to be turned threaded - just like we can't mark the
> root cgroup threaded, and I'm not really not sure what it means to
> delegate a portion of threaded subtree.

Thank you for the clarification!

Roman