linux-kernel - A patch to arch/i386/kernel/irq.c to help get backtraces of (near) stack overflow situations

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Message-ID: <49707BA9.1040102@Calva.COM>
Date:	Fri, 16 Jan 2009 13:20:57 +0100
From:	John Hughes <john@...va.COM>
To:	linux-kernel@...r.kernel.org
Subject: A patch to arch/i386/kernel/irq.c to help get backtraces of (near)
 stack overflow situations

I'm working on a system that is using a bit too much stack to work 
reliably with 4K stacks (OpenSSI with DRBD for the root filesystem 
replication) and I find that the CONFIG_DEBUG_STACKOVERFLOW stuff works 
rather poorly - often the stack dump will cause a stack overflow itself.

Here's a little patch to irq.c to make stack overflow dumps use a 
separate stack.

It's based on 2.6.12 'cos that's how out of date I am.  :-)

Maybe it'll be of use to someone.

Please CC john@...va.com with any comments, I'm not subscribed to the list.

View attachment "arch-i386-kernel-irq.c-overflow.patch" of type "text/x-patch" (3319 bytes)