From owner-freebsd-stable@FreeBSD.ORG Thu Apr 10 21:14:15 2008 Return-Path: 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 24D79106566B for ; Thu, 10 Apr 2008 21:14:15 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from speedfactory.net (mail.speedfactory.net [66.23.216.219]) by mx1.freebsd.org (Postfix) with ESMTP id 974498FC19 for ; Thu, 10 Apr 2008 21:14:14 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from server.baldwin.cx (unverified [66.23.211.162]) by speedfactory.net (SurgeMail 3.8s) with ESMTP id 238656134-1834499 for multiple; Thu, 10 Apr 2008 17:13:13 -0400 Received: from localhost.corp.yahoo.com (john@localhost [127.0.0.1]) (authenticated bits=0) by server.baldwin.cx (8.14.2/8.14.2) with ESMTP id m3ALE4c7085613; Thu, 10 Apr 2008 17:14:07 -0400 (EDT) (envelope-from jhb@freebsd.org) From: John Baldwin To: freebsd-stable@freebsd.org Date: Thu, 10 Apr 2008 16:51:24 -0400 User-Agent: KMail/1.9.7 References: <77E81AD6-FBCC-4D30-A5CB-A9B918D4793F@ish.com.au> <200804080959.46961.jhb@freebsd.org> <3DDEAB7E-F6FF-48C6-A19E-E6D96D365D8E@ish.com.au> In-Reply-To: <3DDEAB7E-F6FF-48C6-A19E-E6D96D365D8E@ish.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200804101651.24852.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-2.0.2 (server.baldwin.cx [127.0.0.1]); Thu, 10 Apr 2008 17:14:10 -0400 (EDT) X-Virus-Scanned: ClamAV 0.91.2/6697/Thu Apr 10 11:05:46 2008 on server.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-4.4 required=4.2 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.1.3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on server.baldwin.cx Cc: bzeeb+freebsd+lor@zabbadoz.net, Jurgen Weber Subject: Re: LOR sleepq/scrlock X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Apr 2008 21:14:15 -0000 On Tuesday 08 April 2008 07:46:41 pm Aristedes Maniatis wrote: > > On 08/04/2008, at 11:59 PM, John Baldwin wrote: > > On Tuesday 08 April 2008 04:06:24 am Aristedes Maniatis wrote: > >> FreeBSD dash.ish.com.au 7.0-RELEASE FreeBSD 7.0-RELEASE #10 > >> i386 with PAE (5Gb RAM) > >> > >> > >> We've had fairly reproducible freezes. After several hours of stress > >> testing or even overnight not doing anything, everything locks up > >> including the console. > >> > >> We then installed a debugging kernel (without INVARIANTS since that > >> prevented the kernel from compiling at all) and obtained this LOR > >> when > >> it froze: > >> > >> LOR: > >> 1st 0x807d3d90 sleepq chain (sleepq chain) @/usr/src/sys/kern/ > >> subr_sleepqueue.c:773 > >> 2nd 0x807c8110 scrlock (scrlock) @/usr/src/sys/dev/syscons/syscons.c: > >> 2526 > >> > >> I have taken photographs of the KDB output following this but have > >> not > >> transcribed it until someone says that it will be useful to them. I > >> could put it up as slightly fuzzy screen photographs on our web site. > > > > The stack trace info would be useful. A photo would be fine. > > > > -- > > John Baldwin > > > Sorry for the quality, these were the best I could do with the camera > I had: > > http://www.ish.com.au/s/LOR/1.jpg > http://www.ish.com.au/s/LOR/2.jpg > http://www.ish.com.au/s/LOR/3.jpg (this overlaps with [2]) These are all garbage in kuickshow. :( > Do you have any hunch about what driver/system might be causing this? > Could it be related to the use of PAE? Because if so, I'd be happy to > leave this server accessible somewhere for FreeBSD developers to work > with and go replace it with a new 64bit system tomorrow for our > production use. Not PAE. If there was a panic or printf inside the kernel sleep queue code itself then you might get this LOR as a side effect, but the real problem would be the original panic or printf. -- John Baldwin