linux-kernel - Re: [PATCH v2 08/15] slab: use __GFP_COMP flag for allocating slab pages

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Message-ID: <00000141c7d1fae0-ff132cb2-5485-4b8f-9b22-d4da27068681-000000@email.amazonses.com>
Date:	Thu, 17 Oct 2013 19:08:49 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>
cc:	Pekka Enberg <penberg@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	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 08/15] slab: use __GFP_COMP flag for allocating slab
 pages

On Wed, 16 Oct 2013, Joonsoo Kim wrote:

> If we use 'struct page' of first page as 'struct slab', there is no
> advantage not to use __GFP_COMP. So use __GFP_COMP flag for all the cases.

Yes this is going to make the allocators behave in the same way. We could
actually put some of the page allocator related functionality in
slab_common.c

Acked-by: Christoph Lameter <cl@...ux.com>
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