From owner-freebsd-fs@FreeBSD.ORG Wed Jan 11 23:58:59 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5C192106564A for ; Wed, 11 Jan 2012 23:58:59 +0000 (UTC) (envelope-from spork@bway.net) Received: from xena.bway.net (xena.bway.net [216.220.96.26]) by mx1.freebsd.org (Postfix) with ESMTP id 1251E8FC08 for ; Wed, 11 Jan 2012 23:58:58 +0000 (UTC) Received: (qmail 78327 invoked by uid 0); 11 Jan 2012 23:58:58 -0000 Received: from smtp.bway.net (216.220.96.25) by xena.bway.net with (DHE-RSA-AES256-SHA encrypted) SMTP; 11 Jan 2012 23:58:58 -0000 Received: (qmail 78318 invoked by uid 90); 11 Jan 2012 23:58:57 -0000 Received: from unknown (HELO ?10.3.2.40?) (spork@96.57.144.66) by smtp.bway.net with (AES128-SHA encrypted) SMTP; 11 Jan 2012 23:58:57 -0000 Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii From: Charles Sprickman In-Reply-To: <20120111224340.72f28ef4@fabiankeil.de> Date: Wed, 11 Jan 2012 18:58:57 -0500 Content-Transfer-Encoding: 7bit Message-Id: References: <20120111154722.000036e4@unknown> <20120111210708.1168781e@fabiankeil.de> <20120111204041.GA47175@icarus.home.lan> <20120111224340.72f28ef4@fabiankeil.de> To: Fabian Keil X-Mailer: Apple Mail (2.1084) Cc: freebsd-fs@freebsd.org Subject: Re: Unplugging disk under ZFS yield panic X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Jan 2012 23:58:59 -0000 On Jan 11, 2012, at 4:43 PM, Fabian Keil wrote: > Jeremy Chadwick wrote: > >> On Wed, Jan 11, 2012 at 09:07:08PM +0100, Fabian Keil wrote: >>> Gergely CZUCZY wrote: >>> >>>> I'd like to ask, whether it is normal behaviour when we're unplugging a >>>> disk under a ZFS system then on the first write a kernel panic happened. >>> >>> Sounds familiar. I currently have two PRs open for >>> reproducible kernel panics after a vdev gets lost: >>> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/162010 >>> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/162036 >>> >>> Note that the pool layouts are different, though. >> >> Is this problem truly ZFS-specific? I'd been tracking this problem for >> years, and was told it was fixed: > > I'm not saying that my problems are ZFS-specific. > The backtraces mainly contain geom functions and no ZFS code, > so ZFS might be the victim here. Is there any relation between this issue and the "log_sysevent: type 19 is not implemented" problem that happens on device insertion/removal on 8.2? http://lists.freebsd.org/pipermail/freebsd-fs/2011-June/011855.html I still see that one on 8.2-STABLE from around 6/2011. I initially thought it was triggered by device failure or removal (even with proper hotplug support), but I got hit by it last night when inserting a new drive in a chassis that supports ahci/sata hotplug. IIRC it's not a ZFS issue, ZFS just gets more spammy (well, extremely spammy to the point the system can't do much else) about reporting an issue with a device going away or being inserted. Charles > >> http://wiki.freebsd.org/BugBusting/Commonly_reported_issues >> >> * Panic occurs when a mounted device (USB, SATA, local image file, >> etc.) is removed >> >> Workaround: Be sure to umount all filesystems before removing the >> physical device >> Partial fix: Committed to CURRENT (8.0) on/prior to 2008/02/21 >> >> There is ongoing work to fully fix this problem, ETA 2009/02 > > This is a different problem. It was even easier to reproduce > and at least I haven't seen it since the fixes went in. > > Fabian