linux-kernel - Re: [PATCH] slub: correctly bootstrap boot caches

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Message-ID: <0000013d02ab8230-de441d64-395f-4c87-89e7-3f2cd2209680-000000@email.amazonses.com>
Date:	Fri, 22 Feb 2013 16:10:27 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Glauber Costa <glommer@...allels.com>
cc:	linux-mm@...ck.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, Pekka Enberg <penberg@...nel.org>,
	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH] slub: correctly bootstrap boot caches

On Fri, 22 Feb 2013, Glauber Costa wrote:

> At this point, we are already slab_state == PARTIAL, while
> init_kmem_cache_nodes will only differentiate against slab_state == DOWN.

kmem_cache_node creation runs before PARTIAL and kmem_cache runs
after. So there would be 2 kmem_cache_node structures allocated. Ok so
that would use cpu slabs and therefore remove pages from the partial list.
Pushing that back using the flushing should fix this. But I thought there
was already code that went through the cpu slabs to address this?

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