linux-kernel - Re: [PATCH 4/4] slub: deactivate freelist of kmem_cache_cpu all at once in deactivate

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Message-ID: <alpine.DEB.2.00.1206081403380.28466@router.home>
Date:	Fri, 8 Jun 2012 14:04:49 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Joonsoo Kim <js1304@...il.com>
cc:	Pekka Enberg <penberg@...nel.org>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 4/4] slub: deactivate freelist of kmem_cache_cpu all at
 once in deactivate_slab()

On Sat, 9 Jun 2012, Joonsoo Kim wrote:

> Current implementation of deactivate_slab() which deactivate
> freelist of kmem_cache_cpu one by one is inefficient.
> This patch changes it to deactivate freelist all at once.
> But, there is no overall performance benefit,
> because deactivate_slab() is invoked infrequently.

Hmm, deactivate freelist can race with slab_free. Need to look at this in
detail.


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