linux-kernel - [PATCH] memcg: towards I/O aware memcg v5

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Message-Id: <20100820185552.426ff12e.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 20 Aug 2010 18:55:52 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	linux-mm@...ck.org
Cc:	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	gthelen@...gle.com, m-ikeda@...jp.nec.com,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kamezawa.hiroyuki@...il.com
Subject: [PATCH] memcg: towards I/O aware memcg v5

This is v5.

Sorry for delaying...but I had time for resetting myself and..several
changes are added. I think this version is simpler than v4.

Major changes from v4 is 
 a) added kernel/cgroup.c hooks again. (for b)
 b) make RCU aware. previous version seems dangerous in an extreme case.

Then, codes are updated. Most of changes are related to RCU.

Patch brief view:
 1. add hooks to kernel/cgroup.c for ID management.
 2. use ID-array in memcg.
 3. record ID to page_cgroup rather than pointer.
 4. make update_file_mapped to be RCU aware routine instead of spinlock.
 5. make update_file_mapped as general-purpose function.

Thanks,
-Kame

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