linux-kernel - Re: [PATCH V2] cgroup: Introduce cgroup_detach

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Date:	Tue, 26 Aug 2014 09:35:36 +0800
From:	Li Zefan <lizefan@...wei.com>
To:	Dongsheng Yang <dongsheng081251@...il.com>
CC:	Tejun Heo <tj@...nel.org>,
	Dongsheng Yang <yangds.fnst@...fujitsu.com>,
	<cgroups@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2] cgroup: Introduce cgroup_detach_task().

On 2014/8/25 23:00, Dongsheng Yang wrote:
> On Mon, Aug 25, 2014 at 10:47 PM, Tejun Heo <tj@...nel.org> wrote:
>> On Mon, Aug 25, 2014 at 10:46:03PM +0800, Dongsheng Yang wrote:
>>> My point here is that attaching and detaching are a pair of operations.
>>
>> There is no detaching from a cgroup.  A task is always attached to a
>> cgroup whether that's a root or non-root cgroup.
> 
> Okey, I should not think it as attaching and detaching. Just treat them as
> a move between root and non-root cgroup.
> 
> It sounds reasonable to me now.
> 

I from time to time have to explain this to other people.

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