linux-kernel - Re: [PATCH 1/2] slab: commonize slab

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Message-ID: <alpine.LFD.2.02.1210241158190.13035@tux.localdomain>
Date:	Wed, 24 Oct 2012 11:58:33 +0300 (EEST)
From:	Pekka Enberg <penberg@...nel.org>
To:	Glauber Costa <glommer@...allels.com>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Christoph Lameter <cl@...ux.com>,
	David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH 1/2] slab: commonize slab_cache field in struct page

On Mon, 22 Oct 2012, Glauber Costa wrote:
> Right now, slab and slub have fields in struct page to derive which
> cache a page belongs to, but they do it slightly differently.
> 
> slab uses a field called slab_cache, that lives in the third double
> word. slub, uses a field called "slab", living outside of the
> doublewords area.
> 
> Ideally, we could use the same field for this. Since slub heavily makes
> use of the doubleword region, there isn't really much room to move
> slub's slab_cache field around. Since slab does not have such strict
> placement restrictions, we can move it outside the doubleword area.
> 
> The naming used by slab, "slab_cache", is less confusing, and it is
> preferred over slub's generic "slab".
> 
> Signed-off-by: Glauber Costa <glommer@...allels.com>
> CC: Christoph Lameter <cl@...ux.com>
> CC: Pekka Enberg <penberg@...nel.org>
> CC: David Rientjes <rientjes@...gle.com>

Applied, thanks!
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