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Date: Wed, 14 Apr 2010 13:32:29 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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Subject: Re: [PATCH] mm: disallow direct reclaim page writeback
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> The only part of the 4K stack code that's good is the separate
> interrupt stack, but that one should be just combined with a sane 8K 
> process stack.

The reality is that if you are blowing a 4K process stack you are
probably playing russian roulette on the current 8K x86-32 stack as well
because of the non IRQ split. So it needs fixing either way