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Re: do_IRQ stack overflow on 32-bit CentOS 4

To: Orion Poplawski <orion@xxxxxxxxxxxxx>
Subject: Re: do_IRQ stack overflow on 32-bit CentOS 4
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Tue, 30 Jun 2009 12:52:44 -0500
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <loom.20090630T165732-116@xxxxxxxxxxxxxx>
References: <loom.20090630T165732-116@xxxxxxxxxxxxxx>
User-agent: Thunderbird 2.0.0.22 (Macintosh/20090605)
Orion Poplawski wrote:
> Just hit a:
> 
> do_IRQ: stack overflow: 452
> 
> on 32-bit CentOS 4 machine with xfs-kmod-0.4-2.el4.  Is there anything that 
> can
> be done to minimize this risk?  Running xfs over md raid5 array, exporting via
> nfs.  More kernel dump messages are posted at:
> 
> http://bugs.centos.org/view.php?id=3136

get an x86_64 machine ;)

The stack overflow message is misleading; it means you have 452 -left-

unfortunately on some kernels, simply printing that message actually
consumes what's left, and more.  See http://lkml.org/lkml/2007/8/29/245

This was fixed in 2.6.18-108.el5 and beyond.

Upstream has some xfs stack size fixes; this may eventually make it to a
centos near you.

-Eric

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