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Date: Thu, 29 May 2008 01:01:08 +0200
From: Kris Kennaway <kris@FreeBSD.org>
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To: Greg Himes <greg@laaco.net>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Kernel Panic:  isp - page fault while in kernel mode
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Greg Himes wrote:
> 
> Hello All,
> 
> Last week, one half of my dual port Qlogic fibre channel interface
> started causing a page fault panic while probing the second port at boot 
> time.
> I was able to get the system back up by disabling the BIOS on the
> second port.  The system still sees the 2nd port, but politely
> displays a few errors, then continues on.
> 
> This all started after I powered the system down for maintenance.
> System is running FreeBSD 6.3-RELEASE i386
> 
> What is the proper way to help debug this problem?

See the developers handbook.

Kris

P.S. And don't do this, you're crippling your network:

> WARNING: MPSAFE network stack disabled, expect reduced performance.