From owner-freebsd-stable@FreeBSD.ORG Thu Oct 5 04:51:47 2006 Return-Path: X-Original-To: stable@freebsd.org Delivered-To: freebsd-stable@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6406F16A416 for ; Thu, 5 Oct 2006 04:51:47 +0000 (UTC) (envelope-from pho@holm.cc) Received: from relay03.pair.com (relay03.pair.com [209.68.5.17]) by mx1.FreeBSD.org (Postfix) with SMTP id 8C9E043D46 for ; Thu, 5 Oct 2006 04:51:46 +0000 (GMT) (envelope-from pho@holm.cc) Received: (qmail 82601 invoked from network); 5 Oct 2006 04:51:44 -0000 Received: from unknown (HELO peter.osted.lan) (unknown) by unknown with SMTP; 5 Oct 2006 04:51:44 -0000 X-pair-Authenticated: 80.165.155.106 Received: from peter.osted.lan (localhost.osted.lan [127.0.0.1]) by peter.osted.lan (8.13.6/8.13.6) with ESMTP id k954phgv081874; Thu, 5 Oct 2006 06:51:43 +0200 (CEST) (envelope-from pho@peter.osted.lan) Received: (from pho@localhost) by peter.osted.lan (8.13.6/8.13.6/Submit) id k954phSp081873; Thu, 5 Oct 2006 06:51:43 +0200 (CEST) (envelope-from pho) Date: Thu, 5 Oct 2006 06:51:42 +0200 From: Peter Holm To: Kris Kennaway Message-ID: <20061005045142.GA81766@peter.osted.lan> References: <20060922190328.GA64849@xor.obsecurity.org> <555B84D2-520F-44D6-84D6-CF9CE7EE47C7@khera.org> <20060922203654.GA65693@xor.obsecurity.org> <847DD3A5-D5DD-4D3E-B755-64B13D1DA506@khera.org> <20061003084315.GA89654@deviant.kiev.zoral.com.ua> <20061004140808.GD89654@deviant.kiev.zoral.com.ua> <20061004163944.GA35412@xor.obsecurity.org> <20061004194148.GA37672@xor.obsecurity.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061004194148.GA37672@xor.obsecurity.org> User-Agent: Mutt/1.4.2.1i Cc: Kostik Belousov , Vivek Khera , stable@freebsd.org Subject: Re: ffs snapshot lockup 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, 05 Oct 2006 04:51:47 -0000 On Wed, Oct 04, 2006 at 03:41:48PM -0400, Kris Kennaway wrote: > On Wed, Oct 04, 2006 at 01:06:37PM -0400, Vivek Khera wrote: > > > > On Oct 4, 2006, at 12:39 PM, Kris Kennaway wrote: > > > > >>> > > >>>The only thing I think was running at the time would be a large file > > >>>copy from a remote system to this one using rsync. > > >> > > >>As I understand, you got the panic. Then, you shall post the panic > > >>message. > > >>If you have core file, then running kgdb on the core may show > > >>required > > >>information. > > >>(it shall be on the console exactly before en > > >>and backtrace (using the bt command of ddb) of the paniced thread. > > > > > >YOu can also do 'show msgbuf' from DDB. > > > > > > > i ran kgdb on the vmcore file. since the dump was generated by > > calling doadump from DDB, the backtrace was showing the call stack of > > that. > > > > from what i read in the output from kgdb, it seems that something > > locked the kernel and we broke to debugger from the watchdog timeout > > (I enable software watchdog). > > Hmm, be careful with that - if you set the timeout too low (and note > that for some workloads O(minutes) may even be too low) then you'll > get a lot of false positives. > Oh, yes. I've using this with success: watchdogd -t 3600 -e 'ls /tmp /dev > /dev/null; true' -s 60 - Peter > Kris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.5 (FreeBSD) > > iD8DBQFFJA58Wry0BWjoQKURAr5dAKDf4YLcBJU9owRw6N1L3FcgJkvOOgCfRQkq > bd8+tGZVB28bkYBN6KL7iO0= > =B7Vl > -----END PGP SIGNATURE-----