linux-kernel - Re: [PATCH 1/2] cgroup: export list of delegatable control files using sysfs

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Message-ID: <20171103175631.GV3252168@devbig577.frc2.facebook.com>
Date:   Fri, 3 Nov 2017 10:56:31 -0700
From:   Tejun Heo <tj@...nel.org>
To:     Roman Gushchin <guro@...com>
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH 1/2] cgroup: export list of delegatable control files
 using sysfs

On Fri, Nov 03, 2017 at 01:46:02PM -0400, Roman Gushchin wrote:
> Delegatable cgroup v2 control files may require special handling
> (e.g. chowning), and the exact list of such files varies between
> kernel versions (and likely to be extended in the future).
> 
> To guarantee correctness of this list and simplify the life
> of userspace (systemd, first of all), let's export the list
> via /sys/kernel/cgroup/delegates pseudo-file.
> 
> Format is siple: each control file name is printed on a new line.
> Example:
>   $ cat /sys/kernel/cgroup/delegates

Generally looks good to me but I'm not sure whether "delegates" is the
right name for the file.  According to dictionary, it doesn't seem to
match too well to what we wanna mean here, which is "these files
belong to the child and should be transferred to the child when
delegating the cgroup".

Thanks.

-- 
tejun