linux-kernel - Re: [patch 07/10] SLUB: Avoid referencing kmem_cache structure in __slab

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Message-ID: <Pine.LNX.4.64.0710281512160.6766@sbz-30.cs.Helsinki.FI>
Date:	Sun, 28 Oct 2007 15:12:29 +0200 (EET)
From:	Pekka J Enberg <penberg@...helsinki.fi>
To:	Christoph Lameter <clameter@....com>
cc:	Matthew Wilcox <matthew@....cx>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [patch 07/10] SLUB: Avoid referencing kmem_cache structure in
 __slab_alloc

On Sat, 27 Oct 2007, Christoph Lameter wrote:
> There is the need to use the objects per slab in the first part of
> __slab_alloc() which is still pretty hot. Copy the number of objects
> per slab into the kmem_cache_cpu structure. That way we can get the
> value from a cache line that we already need to touch. This brings
> the kmem_cache_cpu structure up to 4 even words.

Reviewed-by: Pekka Enberg <penberg@...helsinki.fi>
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