From owner-freebsd-fs@FreeBSD.ORG Mon Apr 8 05:19:05 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 0F011353 for ; Mon, 8 Apr 2013 05:19:05 +0000 (UTC) (envelope-from quartz@sneakertech.com) Received: from relay02.pair.com (relay02.pair.com [209.68.5.16]) by mx1.freebsd.org (Postfix) with SMTP id A8E25169 for ; Mon, 8 Apr 2013 05:19:04 +0000 (UTC) Received: (qmail 29471 invoked by uid 0); 8 Apr 2013 05:12:21 -0000 Received: from 173.48.104.62 (HELO ?10.2.2.1?) (173.48.104.62) by relay02.pair.com with SMTP; 8 Apr 2013 05:12:21 -0000 X-pair-Authenticated: 173.48.104.62 Message-ID: <516251B4.7050809@sneakertech.com> Date: Mon, 08 Apr 2013 01:12:20 -0400 From: Quartz User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: "Lawrence K. Chen, P.Eng." Subject: Re: ZFS: Failed pool causes system to hang References: <1964862508.3535448.1365199766508.JavaMail.root@k-state.edu> In-Reply-To: <1964862508.3535448.1365199766508.JavaMail.root@k-state.edu> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: FreeBSD FS X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Apr 2013 05:19:05 -0000 > So, this thread seems to just stop....and can't see if it was > resolved or not. It wasn't. Jeremy Chadwick was the only one who really responded, but besides confirming it wasn't specific to my hardware, there wasn't a lot he could do. He suggested I email some of the kernel folks directly and/or open a PR about it. (I'm planning on doing both, but haven't had time over the weekend). > Anyways, my input would be did you want long enough to see if the > system will boot before declaring it hung? > I've had my system crash at bad times, which has resulted in the > appearance that the boot is hung...but its busy churning away.... > It seemed hung at trying to mount root It might not have been clear from the back and forth, but my issue isn't a "boot hang" per se, but that "reboots also hang". The zfs subsystem hangs so thoroughly it blocks all io on all disks and prevents the reboot/halt/shutdown procedure from taking the machine down gracefully. Once I press the physical front-panel reboot button the machine comes up immediately (sans the offending pool). And yes I've waited over half an hour and it never recovers. My discussion with Jeremy indicated that the infinite wait is an "expected failure" in the sense that zfs would not be come back to life given the circumstances. ______________________________________ it has a certain smooth-brained appeal