linux-kernel - Re: [PATCH] mm: disallow direct reclaim page writeback

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Message-ID: <20100414133229.134264f0@lxorguk.ukuu.org.uk>
Date:	Wed, 14 Apr 2010 13:32:29 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Chris Mason <chris.mason@...cle.com>, Mel Gorman <mel@....ul.ie>,
	Dave Chinner <david@...morbit.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH] mm: disallow direct reclaim page writeback

> 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
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