From owner-freebsd-stable@FreeBSD.ORG  Mon Jan 28 14:45:24 2008
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 5360416A417;
	Mon, 28 Jan 2008 14:45:24 +0000 (UTC)
	(envelope-from petefrench@ticketswitch.com)
Received: from angel.ticketswitch.com (angel.ticketswitch.com
	[IPv6:2002:57e0:1d4e::1])
	by mx1.freebsd.org (Postfix) with ESMTP id 158F013C447;
	Mon, 28 Jan 2008 14:45:24 +0000 (UTC)
	(envelope-from petefrench@ticketswitch.com)
Received: from [10.50.50.2] (helo=smaug.rattatosk)
	by angel.ticketswitch.com with esmtps (TLSv1:AES256-SHA:256)
	(Exim 4.68 (FreeBSD)) (envelope-from <petefrench@ticketswitch.com>)
	id 1JJVEh-000NRJ-1W; Mon, 28 Jan 2008 14:45:23 +0000
Received: from dilbert.rattatosk ([10.50.50.6] helo=dilbert.ticketswitch.com)
	by smaug.rattatosk with esmtp (Exim 4.68 (FreeBSD))
	(envelope-from <petefrench@ticketswitch.com>)
	id 1JJVEg-0006dw-Va; Mon, 28 Jan 2008 14:45:22 +0000
Received: from petefrench by dilbert.ticketswitch.com with local (Exim 4.68
	(FreeBSD)) (envelope-from <petefrench@ticketswitch.com>)
	id 1JJVEg-00048p-TW; Mon, 28 Jan 2008 14:45:22 +0000
To: jhb@freebsd.org
In-Reply-To: <200801250837.49793.jhb@freebsd.org>
Message-Id: <E1JJVEg-00048p-TW@dilbert.ticketswitch.com>
From: Pete French <petefrench@ticketswitch.com>
Date: Mon, 28 Jan 2008 14:45:22 +0000
Cc: freebsd-stable@freebsd.org
Subject: Re: panic: vm_fault: fault on nofualt entry, addr: 81423000
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 28 Jan 2008 14:45:24 -0000

> That isn't page-aligned which is unexpected, though it should still
> work fine.

I am wondering if the non page alignment is what is causing the
trouble here. I discovered my printfs were causing panics themselves, so
am re-doing a lot of my results as I have been generating some red herrings. 
I will have some more results to email you later, but it looks to me as
if the problem of the first table entry results in unmapping part of the
header, and hence access to the second tbale entry crashes. At least the
address reported in the panic is one I can see was unmapped just before the
panic.

I am doing a full compile against the latest stable and will actually see if I
can track this down in a lot more detail and send you the results,

cheers,

-pete.