linux-kernel - Re: [PATCH v2 01/10] slab: add unlikely macro to help compiler

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Message-ID: <alpine.DEB.2.10.1405070921280.12543@gentwo.org>
Date:	Wed, 7 May 2014 09:21:40 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>
cc:	Pekka Enberg <penberg@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <js1304@...il.com>
Subject: Re: [PATCH v2 01/10] slab: add unlikely macro to help compiler

On Wed, 7 May 2014, Joonsoo Kim wrote:

> slab_should_failslab() is called on every allocation, so to optimize it
> is reasonable. We normally don't allocate from kmem_cache. It is just
> used when new kmem_cache is created, so it's very rare case. Therefore,
> add unlikely macro to help compiler optimization.

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