From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HAXX3-0003aO-7d for user-mode-linux-devel@lists.sourceforge.net; Fri, 26 Jan 2007 12:18:45 -0800 Received: from slartibartfast.pa.net ([66.59.111.182]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1HAXX1-0008Gs-Mg for user-mode-linux-devel@lists.sourceforge.net; Fri, 26 Jan 2007 12:18:45 -0800 Date: Fri, 26 Jan 2007 15:16:54 -0500 (EST) From: William Stearns In-Reply-To: <20070126151328.GA4436@ccure.user-mode-linux.org> Message-ID: References: <20070126151328.GA4436@ccure.user-mode-linux.org> MIME-Version: 1.0 Subject: Re: [uml-devel] Possible hostfs uml kernel data corruption with missing host directory (fc6, 2.6.20-rc5-git3 on opteron) Reply-To: William Stearns List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: Jeff Dike Cc: William Stearns , ML-uml-devel Good morning, Jeff, all, On Fri, 26 Jan 2007, Jeff Dike wrote: > On Fri, Jan 26, 2007 at 04:07:05AM -0500, William Stearns wrote: >> After bisecting the difference between the two root filesystems, >> the critical change was a line in /etc/fstab: >> >> none /mirrors hostfs defaults,/home/mirrors 0 0 >> >> Woah. > > Hmmm. > > Can you enable all of the memory debugging options under Kernel > Hacking and try this again? The slab debugging may trap it closer to > the actual bug. You got it: [wstearns@ford kernels]$ diff -bd -U 0 <(sort config-2.6.20-rc5-git3-1 ) <(sort config-2.6.20-rc5-git3-debugging-2 ) -# CONFIG_DEBUG_LIST is not set +CONFIG_DEBUG_LIST=y -# CONFIG_DEBUG_MUTEXES is not set -# CONFIG_DEBUG_RT_MUTEXES is not set -# CONFIG_DEBUG_RWSEMS is not set -# CONFIG_DEBUG_SLAB is not set +CONFIG_DEBUG_MUTEXES=y +CONFIG_DEBUG_PI_LIST=y +CONFIG_DEBUG_RT_MUTEXES=y +CONFIG_DEBUG_RWSEMS=y +CONFIG_DEBUG_SLAB_LEAK=y +CONFIG_DEBUG_SLAB=y -# CONFIG_DEBUG_SPINLOCK_SLEEP is not set -# CONFIG_DEBUG_VM is not set +CONFIG_DEBUG_SPINLOCK_SLEEP=y +CONFIG_DEBUG_VM=y But no additional debugging messages showed up; just a similar kernel panic at bringing up networking. If you want to take a look, I've placed the root filesystem and the new debug-enabled kernel at http://ford.stearns.org/uml/ , along with the command used to invoke. Cheers, - Bill --------------------------------------------------------------------------- "My PID is Inigo Montoya. You kill -9 my parent process. Prepare to vi." - TVmisGuided on Slashdot -------------------------------------------------------------------------- William Stearns (wstearns@pobox.com). Mason, Buildkernel, freedups, p0f, rsync-backup, ssh-keyinstall, dns-check, more at: http://www.stearns.org -------------------------------------------------------------------------- ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel