linux-kernel - Re: [PATCH -mm] slub: fix cpu hotplug offline/online path

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Message-ID: <Pine.LNX.4.64.0710091149221.32730@schroedinger.engr.sgi.com>
Date:	Tue, 9 Oct 2007 11:50:19 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	Akinobu Mita <akinobu.mita@...il.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH -mm] slub: fix cpu hotplug offline/online path

On Tue, 9 Oct 2007, Pekka Enberg wrote:

> Hi Christoph,
> 
> On 10/9/07, Christoph Lameter <clameter@....com> wrote:
> > Could you check if a per cpu structure has already been allocated and then
> > simply skip the call to init? Otherwise we end up with lots of per cpu
> > structures for cpus that will never show up.
> 
> Does it matter? How?

Our system come by default with the possibility of 1k cpus. However, a 
small system may only have 8 cpus.
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