From owner-freebsd-stable@FreeBSD.ORG Wed Feb 11 16:39:09 2009 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 31DE3106566B for ; Wed, 11 Feb 2009 16:39:09 +0000 (UTC) (envelope-from gerrit@pmp.uni-hannover.de) Received: from mrelay1.uni-hannover.de (mrelay1.uni-hannover.de [130.75.2.106]) by mx1.freebsd.org (Postfix) with ESMTP id 9A61C8FC08 for ; Wed, 11 Feb 2009 16:39:08 +0000 (UTC) (envelope-from gerrit@pmp.uni-hannover.de) Received: from www.pmp.uni-hannover.de (www.pmp.uni-hannover.de [130.75.117.2]) by mrelay1.uni-hannover.de (8.14.2/8.14.2) with ESMTP id n1BGBBZg010686 for ; Wed, 11 Feb 2009 17:11:12 +0100 Received: from pmp.uni-hannover.de (arc.pmp.uni-hannover.de [130.75.117.1]) by www.pmp.uni-hannover.de (Postfix) with SMTP id EA3764F for ; Wed, 11 Feb 2009 17:11:10 +0100 (CET) Date: Wed, 11 Feb 2009 17:11:10 +0100 From: Gerrit =?ISO-8859-1?Q?K=FChn?= To: freebsd-stable@freebsd.org Message-Id: <20090211171110.a8217734.gerrit@pmp.uni-hannover.de> Organization: Albert-Einstein-Institut (MPI =?ISO-8859-1?Q?f=FCr?= Gravitationsphysik & IGP =?ISO-8859-1?Q?Universit=E4t?= Hannover) X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.11; i386-portbld-freebsd7.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-PMX-Version: 5.5.2.363555, Antispam-Engine: 2.6.1.350677, Antispam-Data: 2009.2.11.152513 Subject: zfs crashes with nfs and snapshots 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: Wed, 11 Feb 2009 16:39:09 -0000 Hi folks, I just saw one of my FreeBSD servers (7.0-stable of June 2008) crash while trying to access the .zfs snapshot directory via a nfs client machine. The server got a page fault caused by the nfsd process. It wasn't even able to dump the kernel image anymore. Resetting the machine it first appeared to come back fine, but shortly before the login prompt the nfsd let it crash hard again the same way as before. Then I booted single user, fscked the ufs partitions by hand and had to re-import the zpool with -f. After that I did another reboot, whereupon everything was fine again. As I need that machine I'm a bit unwilling to try accessing the snapshot directory again via nfs right now. :-) So here are some questions before I do anything else: - Did anyone else already see this behaviour? - Is there something wrong with accessing the snapshot directory via nfs? - Does zfs stability profit from an update to a recent -stable? Any answers or further thoughts/hints on this are very welcome. cu Gerrit