linux-kernel - Re: [PATCH 6/9] slab: introduce alien

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Message-ID: <alpine.DEB.2.10.1402141245520.12887@nuc>
Date:	Fri, 14 Feb 2014 12:46:16 -0600 (CST)
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>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Joonsoo Kim <js1304@...il.com>
Subject: Re: [PATCH 6/9] slab: introduce alien_cache

On Fri, 14 Feb 2014, Joonsoo Kim wrote:

> Currently, we use array_cache for alien_cache. Although they are mostly
> similar, there is one difference, that is, need for spinlock.
> We don't need spinlock for array_cache itself, but to use array_cache for
> alien_cache, array_cache structure should have spinlock. This is needless
> overhead, so removing it would be better. This patch prepare it by
> introducing alien_cache and using it. In the following patch,
> we remove spinlock in array_cache.

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