linux-kernel - Re: [PATCH] Move memory controller allocations to their own slabs

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Message-Id: <20080310214100.d7fe7904.akpm@linux-foundation.org>
Date:	Mon, 10 Mar 2008 21:41:00 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Balbir Singh <balbir@...ux.vnet.ibm.com>
Cc:	Paul Menage <menage@...gle.com>,
	Pavel Emelianov <xemul@...nvz.org>,
	Hugh Dickins <hugh@...itas.com>,
	Sudhir Kumar <skumar@...ux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	linux-mm@...ck.org, David Rientjes <rientjes@...gle.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH] Move memory controller allocations to their own slabs

On Tue, 11 Mar 2008 10:01:49 +0530 Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:

> 
> 
> Move the memory controller data structures page_cgroup and
> mem_cgroup_per_zone to their own slab caches. It saves space on the system,
> allocations are not necessarily pushed to order of 2 and should provide
> performance benefits.

eh?  Those structures are tiny.  Which slab allocator has gone and used an
order-2 allocation and for which structure did it (stupidly) do this?


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