From owner-freebsd-stable@FreeBSD.ORG Mon May 11 10:53:02 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 C20FB1065670 for ; Mon, 11 May 2009 10:53:02 +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 374978FC0C for ; Mon, 11 May 2009 10:53:01 +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 n4BAWm8V001396 for ; Mon, 11 May 2009 12:32:49 +0200 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 0D45F4F for ; Mon, 11 May 2009 12:32:48 +0200 (CEST) Date: Mon, 11 May 2009 12:32:47 +0200 From: Gerrit =?ISO-8859-1?Q?K=FChn?= To: freebsd-stable@freebsd.org Message-Id: <20090511123247.b22c0127.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: 2009.5.11.101926 Subject: zfs: dataset is busy 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: Mon, 11 May 2009 10:53:03 -0000 Hi all, I have several machines here that do automatic snapshotting via RSEs snapshot-tool (sysutils/freebsd-snapshot). I use a homemade script to incrementally transfer daily snapshots to a backup server. This runs fine with machines running 7.0-STABLE of Jun 08. However, I have one box with 7.1-PRERELEASE from Sep 08 showing the following error after some time (when trying to rotate the snapshots via the freebsd-snapshot tool): cannot destroy 'tank/www@daily.6': dataset is busy I fact I cannot do anything to the snapshot, neither destroy nor export (not even with "-f"), it is always "busy". The only chance to get away from this I found is to reboot the machine. After a reboot it is fine for some weeks, but then comes back with the same problem. Has anyone seen this before? Is there a fix or workaround available? Are there any improvements I could take profit of by upgrading to 7.2-stable? Right now the machine is in this state, so I could get some more information from it (if anyone tells me what to do :-). cu Gerrit