linux-kernel - Re: [PATCHSET] fix CGROUP VS RCU

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Message-ID: <49267BF0.3080806@cn.fujitsu.com>
Date:	Fri, 21 Nov 2008 17:14:24 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Menage <menage@...gle.com>,
	Linux Containers <containers@...ts.linux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Serge Hallyn <serue@...ibm.com>
Subject: Re: [PATCHSET] fix CGROUP VS RCU

Lai Jiangshan wrote:
> Andrew Morton wrote:
>> On Fri, 21 Nov 2008 16:49:13 +0800 Lai Jiangshan <laijs@...fujitsu.com> wrote:
>>
>>> current some cgroup struct are protected by RCU.
>>>
>>> struct protected by RCU:
>>> 	struct css_set, struct cgroup_subsys_state, struct cgroup
>>>
>>> pointer protected by RCU:
>>> 	struct task_struct.cgroups, struct css_set.subsys[*],
>>> 	struct cgroup_subsys_state.cgroup
>>> the last two pointers are readonly pointer!
>>>
>>> these patches are fix these structs, and pointers. And a faker:
>>> struct cgroup_subsys.root
>>>
>>> Not cleanup all yet.
>>>
>> These patches aren't sequence numbered.  In what order should they be
>> applied?
>>
>>
>>
>>
> 
> No order number, they are dependent(except 2 patches which have order number).

                            dependent --> independent

> 
> Lai.
> 
> 


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