From owner-freebsd-fs@FreeBSD.ORG  Mon Jul  8 18:39:04 2013
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
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 F2F6D7F7;
 Mon,  8 Jul 2013 18:39:03 +0000 (UTC)
 (envelope-from bofh@terranova.net)
Received: from tog.net (tog.net [216.89.226.5])
 by mx1.freebsd.org (Postfix) with ESMTP id D1A0C11A0;
 Mon,  8 Jul 2013 18:39:03 +0000 (UTC)
Received: from [IPv6:2605:5a00:ffff::face] (unknown
 [IPv6:2605:5a00:ffff::face])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by tog.net (Postfix) with ESMTPSA id 3bpwRP3JKbz6NN;
 Mon,  8 Jul 2013 14:38:57 -0400 (EDT)
Message-ID: <51DB0730.1010200@terranova.net>
Date: Mon, 08 Jul 2013 14:38:40 -0400
From: Travis Mikalson <bofh@terranova.net>
Organization: TerraNovaNet Internet Services
User-Agent: Thunderbird 2.0.0.24 (Windows/20100228)
MIME-Version: 1.0
To: freebsd-fs@freebsd.org
Subject: Re: Report: ZFS deadlock in 9-STABLE
References: <51D45401.5050801@terranova.net> <51D47A5F.3030501@delphij.net>
In-Reply-To: <51D47A5F.3030501@delphij.net>
X-Enigmail-Version: 0.96.0
OpenPGP: url=http://www.terranova.net/pgp/bofh
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: kib@freebsd.org, d@delphij.net
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 08 Jul 2013 18:39:04 -0000

Xin Li wrote:
> Hi,
> 
> Sorry for the top posting but I am quite convinced that this is a
> known issue that we have seen with our customer.  Please try applying
> this patch [1] and please report back if that fixes your problem.
> 
> Note that if you would like to provide more help, we would appreciate
> that you test Konstantin's patch as well, at:
> 
> http://lists.freebsd.org/pipermail/freebsd-hackers/2013-May/042876.html
> 
> [1] See attachment; the commit is
> https://github.com/trueos/trueos/commit/f678ae7c7f72fba577b00e3d0c237c4f297575c6

As of ~12 hours ago I am running that system with your patch (which
seems to have incorporated Konstantin's patch already) and if it was
effective I will not have anything to report back for at least 20 days.
No news will be good news in this case.

If I make it to 20+ days without a livelock, that will be a pretty good
indication that this helped if not fixed it and I will report back at
that time. Thus far this year I've not gone longer than 15 days without
a livelock.

Thank you again!