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Date: Wed, 10 Oct 2007 10:39:32 -0700 (PDT)
From: Christoph Lameter <clameter@....com>
To: Akinobu Mita <akinobu.mita@...il.com>
cc: linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [PATCH -mm] slub: fix cpu hotplug offline/online path
On Wed, 10 Oct 2007, Akinobu Mita wrote:
> I couldn't use get_cpu_slab() for that check. But I reviced the patch to do
> what you said.
Why would get_cpu_slab not work?
> + if (per_cpu(kmem_cache_cpu_free, cpu)) {
> + /* Already initialized once */
> + return;
> + }
> +
kmem_cache_cpu_free is not only NULL if the cpu is not up yet but it is
also NULL if the per cpu pool of kmem_cache_cpu structures was
exhausted.
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