linux-kernel - [PATCH 0/3] cgroup id and scanning without cgroup

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Message-Id: <20081201145907.e6d63d61.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Mon, 1 Dec 2008 14:59:07 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"linux-mm@...ck.org" <linux-mm@...ck.org>
Cc:	"lizf@...fujitsu.com" <lizf@...fujitsu.com>,
	"menage@...gle.com" <menage@...gle.com>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: [PATCH 0/3] cgroup id and scanning without cgroup_lock

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,
-Kame

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