linux-kernel - Re: cgroups(7): documenting cgroups v2 delegation

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Message-ID: <fdfc4c27-f87c-fab8-894c-f9f21374bab2@gmail.com>
Date:   Wed, 10 Jan 2018 23:01:11 +0100
From:   "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     mtk.manpages@...il.com, "Serge E. Hallyn" <serge@...lyn.com>,
        linux-man <linux-man@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>, cgroups@...r.kernel.org,
        Roman Gushchin <guro@...com>
Subject: Re: cgroups(7): documenting cgroups v2 delegation

Hello Tejun,

On 01/10/2018 08:39 PM, Tejun Heo wrote:
> Hello,
> 
> On Wed, Jan 10, 2018 at 08:20:53PM +0100, Michael Kerrisk (man-pages) wrote:
>> On 01/10/2018 03:26 PM, Tejun Heo wrote:
>>> Hello, Michael.
>>>
>>> On Tue, Jan 09, 2018 at 11:48:11PM +0100, Michael Kerrisk (man-pages) wrote:
>>>>> That said, not necessarily an objection.  I'm just not sure about it.
>>>>
>>>> Okay. For the moment, I'll leave that text as is.
>>>>
>>>> I realized that there was also one more file that needs to be included
>>>> in the list of files that must be delegated:
>>>>
>>>>        /dlgt_grp/cgroup.threads
>>>>               Changing the ownership of  this  file  is  necessary  if  a
>>>>               threaded subtree is being delegated (see the description of
>>>>               "thread mode", below).
>>>>
>>>> Can you please confirm that it's only necessary to delegate this file
>>>> if we are delegating a threaded subtree?
>>>
>>> Replied on the other thread.  The file isn't delegatable as far as I
>>> can tell.
>>
>> So, following on from the discussion in the other thread, my
>> question above still stands.
> 
> Oh, I frankly haven't thought about delegating a threaded subtree.

I'm still confused. cgroup-v2.txt documents the possibility. You
wrote that text. We just had a conversation in another thread about the
fact that cgroup.threads is delegatable. You must have thought at 
least a little about this?

Cheers,

Michael

-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/