Re: [PATCH 0/3] cgroup id and scanning without cgroup_lock

[Balbir Singh <balbir@linux.vnet.ibm.com>]

* KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2008-12-01 14:59:07]:

> This is a series of patches againse mmotm-Nov29
> (passed easy test)
> 
> Now, memcg supports hierarhcy. But walking cgroup tree in intellegent way
> with lock/unlock cgroup_mutex seems to have troubles rather than expected.
> And, I want to reduce the memory usage of swap_cgroup, which uses array of
> pointers.
> 
> This patch series provides
> 	- cgroup_id per cgroup object.
> 	- lookup struct cgroup by cgroup_id
> 	- scan all cgroup under tree by cgroup_id. without mutex.
> 	- css_tryget() function.
> 	- fixes semantics of notify_on_release. (I think this is valid fix.)
> 
> Many changes since v1. (But I wonder some more work may be neeeded.)
> 
> BTW, I know there are some amount of patches against memcg are posted recently.
> If necessary, I'll prepare Weekly-update queue again (Wednesday) and
> picks all patches to linux-mm in my queue.
>

Thanks for the offer, I've just come back from foss.in. I need to look
athe locking issue with cgroup_lock() reported and also review/test
the other patches. 

-- 
	Balbir

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