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Date: Thu, 20 Feb 2003 12:23:49 -0800
From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Linus Torvalds <torvalds@transmeta.com>
cc: Ingo Molnar <mingo@elte.hu>, Dave Hansen <haveblue@us.ibm.com>,
       Zwane Mwaikambo <zwane@holomorphy.com>, Chris Wedgwood <cw@f00f.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       William Lee Irwin III <wli@holomorphy.com>
Subject: Re: doublefault debugging (was Re: Linux v2.5.62 --- spontaneous	reboots)
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>> Ok, the 4kB stack definitely won't work in real life, but that's because 
>> we have some hopelessly bad stack users in the kernel. But the debugging 
>> part would be good to try (in fact, it might be a good idea to keep the 
>> 8kB stack, but with rather anal debugging. Just the "mcount" part should 
>> do that).
> 
> You also need IRQ stacks to get down to 4K. The wrong pattern of ten
> different IRQ handlers using a mere 200 bytes each will eventually
> happen and eventually kill you otherwise.

That's in Dave's patchset, and 4K stacks is a config option for now.

M.

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