linux-kernel - Re: [PATCH v2 00/15] slab: overload struct slab over struct page to reduce memory usage

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Message-ID: <525F8FA4.3000702@iki.fi>
Date:	Thu, 17 Oct 2013 09:20:04 +0200
From:	Pekka Enberg <penberg@....fi>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Pekka Enberg <penberg@...nel.org>,
	Christoph Lameter <cl@...ux.com>,
	Joonsoo Kim <js1304@...il.com>,
	David Rientjes <rientjes@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2 00/15] slab: overload struct slab over struct page
 to reduce memory usage

On 10/16/13 10:34 PM, Andrew Morton wrote:
> On Wed, 16 Oct 2013 17:43:57 +0900 Joonsoo Kim <iamjoonsoo.kim@....com> wrote:
>
>> There is two main topics in this patchset. One is to reduce memory usage
>> and the other is to change a management method of free objects of a slab.
>>
>> The SLAB allocate a struct slab for each slab. The size of this structure
>> except bufctl array is 40 bytes on 64 bits machine. We can reduce memory
>> waste and cache footprint if we overload struct slab over struct page.
> Seems a good idea from a quick look.

Indeed.

Christoph, I'd like to pick this up and queue for linux-next. Any
objections or comments to the patches?

                     Pekka
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