From owner-freebsd-current@FreeBSD.ORG  Fri Nov 13 08:10:50 2009
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 19805106568B
	for <freebsd-current@freebsd.org>; Fri, 13 Nov 2009 08:10:50 +0000 (UTC)
	(envelope-from avg@icyb.net.ua)
Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140])
	by mx1.freebsd.org (Postfix) with ESMTP id 560718FC08
	for <freebsd-current@freebsd.org>; Fri, 13 Nov 2009 08:10:49 +0000 (UTC)
Received: from porto.topspin.kiev.ua (porto-e.starpoint.kiev.ua
	[212.40.38.100])
	by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id KAA23056;
	Fri, 13 Nov 2009 10:10:47 +0200 (EET) (envelope-from avg@icyb.net.ua)
Received: from localhost.topspin.kiev.ua ([127.0.0.1])
	by porto.topspin.kiev.ua with esmtp (Exim 4.34 (FreeBSD))
	id 1N8rF1-000Gfx-6I; Fri, 13 Nov 2009 10:10:47 +0200
Message-ID: <4AFD1468.5040909@icyb.net.ua>
Date: Fri, 13 Nov 2009 10:10:16 +0200
From: Andriy Gapon <avg@icyb.net.ua>
User-Agent: Thunderbird 2.0.0.23 (X11/20090823)
MIME-Version: 1.0
To: "S.N.Grigoriev" <serguey-grigoriev@yandex.ru>
References: <1031257439203@webmail57.yandex.ru>
	<20091105184925.16b55c43@ernst.jennejohn.org>
	<31221257446063@webmail71.yandex.ru>
	<20091106101943.5a763f43@ernst.jennejohn.org>
	<41361257585651@webmail39.yandex.ru>
	<20091107115256.3df62bc3@ernst.jennejohn.org>
	<1257618758.1511.14.camel@RabbitsDen>
	<6511257846119@webmail85.yandex.ru>
	<20091110105856.1270038e@ernst.jennejohn.org>
	<1257864452.46072.25.camel@RabbitsDen>
	<20091110162205.48abcffe@ernst.jennejohn.org>
	<4AF99D53.9030005@icyb.net.ua> <hdc73v$4rt$1@ger.gmane.org>
	<941257966918@webmail42.yandex.ru> <4AFC0F6A.3000501@icyb.net.ua>
	<36041258043646@webmail59.yandex.ru>
In-Reply-To: <36041258043646@webmail59.yandex.ru>
X-Enigmail-Version: 0.96.0
Content-Type: text/plain; charset=KOI8-U
Content-Transfer-Encoding: 7bit
Cc: freebsd-current@freebsd.org
Subject: Re: 8.0RC2 amd64 - kernel panic running make buildworld
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 13 Nov 2009 08:10:50 -0000

on 12/11/2009 18:34 S.N.Grigoriev said the following:
> 
> 12.11.09, 15:36, "Andriy Gapon" <avg@icyb.net.ua>
> wrote:
> 
>> Serguey,
>> are you sure that setting vm.pmap.pg_ps_enabled=0 doesn't help you?
>> I know that already asked you this once.
>> But, could you please try again with vm.pmap.pg_ps_enabled=0 and hw.mca.enabled=1
>> and see what kind of behavior you get?
>> I am curious what would happen, would it be the same kind of machine check condition.
> 
> Andriy,
> 
> I've done the world compilation with 'vm.pmap.pg_ps_enabled=0'.
> The first attempt has finished with silent reboot. The second one has
> been captured by the debugger:
> 
> panic: backgroundwritedone: lost buffer
> cpuid = 0
> KDB: enter: panic
> [thread pid 3 tid 100014 ]
> Stopped at breakpoint+0x5: leave
> 

This is a really weird panic.
Looks like perhaps there are multiple problems with your system.  I wouldn't
rule out a real hardware problem.  Not sure what can be done.

-- 
Andriy Gapon