linux-kernel - Re: [PATCH] slub: try to get cpu partial slab even if we get enough objects for cpu freelist

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Message-ID: <000001392af5ab4e-41dbbbe4-5808-484b-900a-6f4eba102376-000000@email.amazonses.com>
Date:	Wed, 15 Aug 2012 15:45:07 +0000
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, David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH] slub: try to get cpu partial slab even if we get enough
 objects for cpu freelist

On Thu, 16 Aug 2012, Joonsoo Kim wrote:

> s->cpu_partial determine the maximum number of objects kept
> in the per cpu partial lists of a processor. Currently, it is used for
> not only per cpu partial list but also cpu freelist. Therefore
> get_partial_node() doesn't work properly according to our first intention.

The "cpu freelist" in slub is the number of free objects in a specific
page. There is nothing that s->cpu_partial can do about that.

Maybe I do not understand you correctly. Could you explain this in some
more detail?
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