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From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Paul Menage <menage@google.com>,
	Pavel Emelianov <xemul@openvz.org>,
	Hugh Dickins <hugh@veritas.com>,
	Sudhir Kumar <skumar@linux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@valinux.co.jp>,
	lizf@cn.fujitsu.com, linux-kernel@vger.kernel.org,
	taka@valinux.co.jp, linux-mm@kvack.org,
	David Rientjes <rientjes@google.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH] Move memory controller allocations to their own slabs
Date: Tue, 11 Mar 2008 10:15:40 +0530	[thread overview]
Message-ID: <47D60E74.6080109@linux.vnet.ibm.com> (raw)
In-Reply-To: <20080310214100.d7fe7904.akpm@linux-foundation.org>

Andrew Morton wrote:
> On Tue, 11 Mar 2008 10:01:49 +0530 Balbir Singh <balbir@linux.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?
> 
> 

When I say order of 2, I meant with kmalloc. They are rounded of to 64, 128 byte
boundary. I wanted to pack these objects more closely.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL

  reply	other threads:[~2008-03-11  4:45 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-11  4:31 Balbir Singh
2008-03-11  4:41 ` Andrew Morton
2008-03-11  4:45   ` Balbir Singh [this message]
2008-03-11  4:45 ` KAMEZAWA Hiroyuki
2008-03-11  4:46   ` Balbir Singh
2008-03-11  5:00 ` + KOSAKI Motohiro
2008-03-11  5:07   ` + Balbir Singh

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