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Date:      Tue, 19 Dec 1995 03:42:52 -0500 (EST)
From:      Peter Dufault <dufault@hda.com>
To:        davidg@Root.COM
Cc:        gibbs@freefall.freebsd.org, m.sapsed@bangor.ac.uk, hm@hcs.de, freebsd-bugs@freebsd.org
Subject:   Re: Problem with FreeBSD 2.1.0-RELEASE
Message-ID:  <199512190842.DAA19622@hda.com>
In-Reply-To: <199512190342.TAA02913@corbin.Root.COM> from "David Greenman" at Dec 18, 95 07:42:33 pm

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> >> Fatal trap 12: page fault while in kernel mode
> >> Fault virtual address              = 0x60
> >> Fault code                         = supervisor read, page not present
> ...
> >> Stopped at _incore+0x48: cmpl %esi, 0x48(%ebx)
> >

...

> 
>    This is a "can't happen" panic.

I don't think so.  The offset to the b_lblkno was 72 (0x48) and
the fault address was 0x60, so the bp in %ebx was 0x24 at the check
for NULL.

--
Peter Dufault               Real Time Machine Control and Simulation
HD Associates, Inc.         Voice: 508 433 6936
dufault@hda.com             Fax:   508 433 5267



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