From owner-freebsd-hackers@FreeBSD.ORG  Mon Sep 24 09:33:15 2007
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 4598E16A419
	for <freebsd-hackers@freebsd.org>; Mon, 24 Sep 2007 09:33:15 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Received: from weak.local (hub.freebsd.org [IPv6:2001:4f8:fff6::36])
	by mx1.freebsd.org (Postfix) with ESMTP id 3F91613C448;
	Mon, 24 Sep 2007 09:33:12 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Message-ID: <46F78459.4060607@FreeBSD.org>
Date: Mon, 24 Sep 2007 11:33:13 +0200
From: Kris Kennaway <kris@FreeBSD.org>
User-Agent: Thunderbird 2.0.0.6 (Macintosh/20070728)
MIME-Version: 1.0
To: Borja Marcos <BORJAMAR@SARENET.ES>
References: <c53be070709211526j2178ebb7ia6ea39e1a5df303c@mail.gmail.com>
	<FADD8244-DE07-4AA7-8EF0-C49257D4746B@SARENET.ES>
In-Reply-To: <FADD8244-DE07-4AA7-8EF0-C49257D4746B@SARENET.ES>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org, Benjie Chen <benjie@addgene.org>
Subject: Re: Kernel panic on PowerEdge 1950 under certain stress load
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 24 Sep 2007 09:33:15 -0000

Borja Marcos wrote:
> 
> On 22 Sep 2007, at 00:26, Benjie Chen wrote:
> 
>> FreeBSD 6.2 on PowerEdge 1950, RAID1 setup with mfi driver (PERC5i). 4GB
>> RAM. I am currently running i386, and not amd64, due to various reasons.
>>
>> Kernel panic is at 0xC066C731, which from nm shows it's in mtx_lock_spin
>>  c066c7b4 T _mtx_lock_spin
>>  c066c85c T _mtx_unlock_sleep
>>
>> So this could mean that independent stress tests will not result in 
>> panic if
>> there aren't enough concurrency to cause the problem.
> 
> I don't have the exact IP address involved, but we experienced 
> consistent panics in two heavily loaded mail servers (same hardware 
> models, Dell Powereedge) runnning Postfix and FreeBSD 6.2.
> 
> Suspecting an issue with the IP stack and smp I tried to set 
> "debug.mpsafenet=0" and the problems are gone. Of course I've lost some 
> performance, but the systems have been solid for some weeks so far.

What number is the PR with the details?

Kris