linux-kernel - Re: [PATCH][RFC] 4K stacks default, not a debug thing any more...?

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Message-ID: <20070719105232.GF29728@v2.random>
Date:	Thu, 19 Jul 2007 12:52:32 +0200
From:	Andrea Arcangeli <andrea@...e.de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Matt Mackall <mpm@...enic.com>,
	Rene Herman <rene.herman@...il.com>,
	Ray Lee <ray-lk@...rabbit.org>, Bodo Eggert <7eggert@....de>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Jesper Juhl <jesper.juhl@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	William Lee Irwin III <wli@...omorphy.com>,
	David Chinner <dgc@....com>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [PATCH][RFC] 4K stacks default, not a debug thing any more...?

On Thu, Jul 19, 2007 at 10:23:59AM +0100, Alan Cox wrote:
> Still don't follow. How is "exceeds stack space but less likely to be
> noticed" safer.

Statistically speaking it clearly is. The reason is probably that the
irq theoretical issue happens only on large boxes with lots of
reentrant irqs. Not all irqs are reentrant, not all systems runs lots
of irqs at the same time etc..
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