linux-kernel - Re: [PATCHv2 7/7] cgroup: mount cgroupns-root when inside non-init cgroupns

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Message-ID: <20141104135726.GB14014@htj.dyndns.org>
Date:	Tue, 4 Nov 2014 08:57:26 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Aditya Kali <adityakali@...gle.com>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Li Zefan <lizefan@...wei.com>,
	Serge Hallyn <serge.hallyn@...ntu.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	cgroups@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux API <linux-api@...r.kernel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Linux Containers <containers@...ts.linux-foundation.org>,
	Rohit Jnagal <jnagal@...gle.com>
Subject: Re: [PATCHv2 7/7] cgroup: mount cgroupns-root when inside non-init
 cgroupns

Hello, Aditya.

On Mon, Nov 03, 2014 at 03:12:28PM -0800, Aditya Kali wrote:
> I think the sane-behavior flag is only temporary and will be removed
> anyways, right? So I didn't bother asking user to supply it. But I can
> make the change as you suggested. We just have to make sure that tasks
> inside cgroupns cannot mount non-default hierarchies as it would be a
> regression.

I'm not sure whether supporting mounting from inside a ns is even
necessary but, if it is, can't you just test against cgrp_dfl_root?
There's no reason to do anything differnetly for ns mounting.

Thanks.

-- 
tejun
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