From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261205AbUL1Ljt (ORCPT ); Tue, 28 Dec 2004 06:39:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261768AbUL1Ljt (ORCPT ); Tue, 28 Dec 2004 06:39:49 -0500 Received: from outpost.ds9a.nl ([213.244.168.210]:26314 "EHLO outpost.ds9a.nl") by vger.kernel.org with ESMTP id S261205AbUL1Ljr (ORCPT ); Tue, 28 Dec 2004 06:39:47 -0500 Date: Tue, 28 Dec 2004 12:39:47 +0100 From: bert hubert To: Gildas LE NADAN Cc: linux-kernel@vger.kernel.org Subject: Re: unkillable processes using samba, xfs and lvm2 snapshots (k 2.6.10) Message-ID: <20041228113946.GA10807@outpost.ds9a.nl> Mail-Followup-To: bert hubert , Gildas LE NADAN , linux-kernel@vger.kernel.org References: <41D14251.4030704@inha.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41D14251.4030704@inha.fr> User-Agent: Mutt/1.3.28i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 28, 2004 at 12:24:01PM +0100, Gildas LE NADAN wrote: > I experience hangs on samba processes on a filer using xfs over lvm2 as > data partitions, when there is active snapshots of the xfs partitions. A trick is to enable alt-sysrq and press alt-sysrq-t (I think) which spams your syslog with backtraces of all processes currently running, including the ones stuck in 'D' state (ps aux | grep " D "). If you isolate these backtraces and send them to this list, they will enable developers to help you. Make sure you add 'includes backtrace' in your Subject. > Testings showed that the result was the same, whether the snapshots were > mounted or not : smbd processes are locked and unkillable while the > machine is normaly working otherwise, except software reboot is > impossible and hardware reset is needed. For maximum usefulness, make your setup as simple as possible and reproduce. Good luck - I personally can't help you in any real way, except to help you get the debugging information that is needed. -- http://www.PowerDNS.com Open source, database driven DNS Software http://lartc.org Linux Advanced Routing & Traffic Control HOWTO