From owner-freebsd-net@FreeBSD.ORG  Mon Feb 19 18:24:17 2007
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
X-Original-To: freebsd-net@freebsd.org
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id C50CA16B693
	for <freebsd-net@freebsd.org>; Mon, 19 Feb 2007 18:24:16 +0000 (UTC)
	(envelope-from tarkhil@webmail.sub.ru)
Received: from mail.sub.ru (mail.sub.ru [88.212.205.2])
	by mx1.freebsd.org (Postfix) with SMTP id F412613C471
	for <freebsd-net@freebsd.org>; Mon, 19 Feb 2007 18:24:15 +0000 (UTC)
	(envelope-from tarkhil@webmail.sub.ru)
Received: (qmail 63856 invoked by uid 0); 19 Feb 2007 21:30:15 +0300
Received: from unknown (HELO ?85.192.19.9?) (tarkhil%sub.ru@85.192.19.9)
	by techno.sub.ru with SMTP; 19 Feb 2007 18:30:15 -0000
Message-ID: <45D9EB48.1040302@webmail.sub.ru>
Date: Mon, 19 Feb 2007 21:24:08 +0300
From: Alex Povolotsky <tarkhil@webmail.sub.ru>
User-Agent: Thunderbird 1.5.0.9 (X11/20070104)
MIME-Version: 1.0
To: Max Laier <max@love2party.net>
References: <45D9BADB.6010405@webmail.sub.ru>
	<200702191806.03621.max@love2party.net>
In-Reply-To: <200702191806.03621.max@love2party.net>
Content-Type: text/plain; charset=KOI8-R; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-net@freebsd.org
Subject: Re: mpd sometimes hangs the whole system?
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 19 Feb 2007 18:24:17 -0000

Max Laier wrote:
> [ Removing -stable from CC ]
>
> On Monday 19 February 2007 15:57, Alex Povolotsky wrote:
>   
>> mpd (fresh) on FreeBSD 6.1p12 sometimes hangs system, totally, to
>> reset. Tried two completely different boxes, so it cannot be a hardware
>> problem.
>>
>> I'm updating to 6.2 now, but have little hope. What can I turn on in
>> kernel to fix it or at least to make computer reboot?
>>     
>
> How do you figure it's mpd related?  Did you collect *any* debugging 
> information at all?  How about enabling DDB and WITNESS?  A "hanging" 
> system usually suggests a deadlock.  WITNESS should turn up possible 
> causes.  Also, could you check if setting debug.mpsafenet=0 in 
> loader.conf helps?
>
>   
Well, I'll try new kernel tomorrow; I've rebuild non-SMP kernel, so 
mpsafenet should not be of any use?

Alex.