Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760096AbZDJXM4 (ORCPT ); Fri, 10 Apr 2009 19:12:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753634AbZDJXMr (ORCPT ); Fri, 10 Apr 2009 19:12:47 -0400 Received: from e5.ny.us.ibm.com ([32.97.182.145]:58403 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751758AbZDJXMq (ORCPT ); Fri, 10 Apr 2009 19:12:46 -0400 Date: Fri, 10 Apr 2009 16:12:45 -0700 From: "Paul E. McKenney" To: Tetsuo Handa Cc: viro@ZenIV.linux.org.uk, linux-kernel@vger.kernel.org, hugh@veritas.com, jmorris@namei.org, akpm@linux-foundation.org Subject: Re: [2.6.30-rc1] RCU detected CPU 1 stall Message-ID: <20090410231245.GF6719@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <200904080057.n380vZAH051872@www262.sakura.ne.jp> <20090410142203.GA6719@linux.vnet.ibm.com> <20090410150353.GL26366@ZenIV.linux.org.uk> <20090410153229.GB6719@linux.vnet.ibm.com> <200904110608.IED21123.FQOVMtSOOHFFLJ@I-love.SAKURA.ne.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200904110608.IED21123.FQOVMtSOOHFFLJ@I-love.SAKURA.ne.jp> User-Agent: Mutt/1.5.15+20070412 (2007-04-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2063 Lines: 50 On Sat, Apr 11, 2009 at 06:08:54AM +0900, Tetsuo Handa wrote: > Hello. > > Paul E. McKenney wrote: > > Tetsuo, how many tasks did you have on this machine? > I didn't count how many tasks were running on this machine. > But the number of tasks should be very low, for this happened during > the boot stage of Debian Sarge. > > 30 seconds ago from the first stalled message > > [ 41.415158] INFO: RCU detected CPU 1 stall (t=4294902646/2500 jiffies) > [ 41.417332] Pid: 3487, comm: khelper Tainted: G W 2.6.30-rc1 #1 > [ 41.417332] Call Trace: > > the system was doing > > [ 10.555521] kjournald starting. Commit interval 5 seconds > [ 10.556727] EXT3 FS on sdb1, internal journal > [ 10.556727] EXT3-fs: recovery complete. > [ 10.557585] EXT3-fs: mounted filesystem with writeback data mode. > /dev/sdb1 on /usr/src/all type ext3 (rw,noatime,nodiratime) > Detecting hardware: agpgart pcnet32 piix BusLogic ide_scsi > Skipping unavailable/built-in agpgart module. > pcnet32 disabled in configuration. > Skipping unavailable/built-in piix module. > Skipping unavailable/built-in BusLogic module. > Skipping unavailable/built-in ide_scsi module. > Running 0dns-down to make sure resolv.conf is ok...done. > Setting up networking...done. > Starting hotplug subsystem: > pci > ignoring pci display device 00:0f.0 > [ 16.727603] ------------[ cut here ]------------ > [ 16.729910] WARNING: at security/security.c:217 security_vm_enough_memory+0xa0/0xb0() > > > Though I too find it hard to believe that there were enough to chew up > > two minutes. Maybe the list got corrupted so that it has a loop? > > I powered off the machine after two minutes, for I thought the loop > was infinite. Is this reproducible? If so, any chance you could try bisecting? Thanx, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/