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

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Date:	Thu, 19 Jul 2007 12:44:19 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Andrea Arcangeli <andrea@...e.de>
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...?

> I don't think they're necessarily bugs. IMHO the WARN_ON is better off
> at 7k level like it is today with the current STACK_WARN. 4k for a
> stack for common code really is small. I doubt you're going to find

You want the limit settable. On a production system you want to set the
limit to somewhere appropriate for the stack size used. When debugging
(eg to remove any last few bogus users of 8K stack space) you want to be
able to set it to just under 4K

Alan
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