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From: Andi Kleen <ak@suse.de>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Subject: Re: 2.6.16-rc6-mm2
Date: Tue, 13 Jun 2006 07:48:02 +0200
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       Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
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> You can't do this in general, because CPU hotplug will reset the
> affinity mask if the CPU is unplugged. I'd just say: don't do that.

Good point.
> 
> However you can get some similar functionality by putting stuff in
> task_struct.

Or better don't do it at all. per cpu data and sleeping just doesn't mix.

-Andi