linux-kernel - Re: [RFC][-mm] Add an owner to the mm

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Date:	Tue,  1 Apr 2008 15:03:30 +0900 (JST)
From:	yamamoto@...inux.co.jp (YAMAMOTO Takashi)
To:	balbir@...ux.vnet.ibm.com
Cc:	menage@...gle.com, xemul@...nvz.org, hugh@...itas.com,
	skumar@...ux.vnet.ibm.com, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	linux-mm@...ck.org, rientjes@...gle.com, akpm@...ux-foundation.org,
	kamezawa.hiroyu@...fujitsu.com
Subject: Re: [RFC][-mm] Add an owner to the mm_struct (v3)

> This patch removes the mem_cgroup member from mm_struct and instead adds
> an owner. This approach was suggested by Paul Menage. The advantage of
> this approach is that, once the mm->owner is known, using the subsystem
> id, the cgroup can be determined. It also allows several control groups
> that are virtually grouped by mm_struct, to exist independent of the memory
> controller i.e., without adding mem_cgroup's for each controller,
> to mm_struct.
> 
> A new config option CONFIG_MM_OWNER is added and the memory resource
> controller selects this config option.
> 
> NOTE: This patch was developed on top of 2.6.25-rc5-mm1 and is applied on top
> of the memory-controller-move-to-own-slab patch (which is already present
> in the Andrew's patchset).
> 
> I am indebted to Paul Menage for the several reviews of this patchset
> and helping me make it lighter and simpler.
> 
> This patch was tested on a powerpc box, by running a task under the memory
> resource controller and moving it across groups at a constant interval.
> 
> Signed-off-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
> ---

changing mm->owner without notifying controllers makes it difficult to use.
can you provide a notification mechanism?

YAMAMOTO Takashi
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