From owner-freebsd-fs@FreeBSD.ORG  Wed Jun 11 17:55:50 2014
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: freebsd-fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id BA86FCF2
 for <freebsd-fs@freebsd.org>; Wed, 11 Jun 2014 17:55:50 +0000 (UTC)
Received: from bigwig.baldwin.cx (bigwig.baldwin.cx [IPv6:2001:470:1f11:75::1])
 (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 93800226B
 for <freebsd-fs@freebsd.org>; Wed, 11 Jun 2014 17:55:50 +0000 (UTC)
Received: from jhbbsd.localnet (unknown [209.249.190.124])
 by bigwig.baldwin.cx (Postfix) with ESMTPSA id 7BA09B9C4;
 Wed, 11 Jun 2014 13:55:49 -0400 (EDT)
From: John Baldwin <jhb@freebsd.org>
To: freebsd-fs@freebsd.org
Subject: Re: ZFS import panic (kgdb backtrace attached)
Date: Wed, 11 Jun 2014 12:52:02 -0400
User-Agent: KMail/1.13.5 (FreeBSD/8.4-CBSD-20140415; KDE/4.5.5; amd64; ; )
References: <CAD2Ti29gKmED34S5z6NEUnaGOsx8m2uPEJiPWPZLcebJ6PD-mw@mail.gmail.com>
 <201406101158.08599.jhb@freebsd.org>
 <CAD2Ti29vpDa2rwE5_opwV9BFmmEx62UzdgHt-tX8RoWxy2wjMw@mail.gmail.com>
In-Reply-To: <CAD2Ti29vpDa2rwE5_opwV9BFmmEx62UzdgHt-tX8RoWxy2wjMw@mail.gmail.com>
MIME-Version: 1.0
Content-Type: Text/Plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <201406111252.02544.jhb@freebsd.org>
X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.7
 (bigwig.baldwin.cx); Wed, 11 Jun 2014 13:55:49 -0400 (EDT)
Cc: grarpamp <grarpamp@gmail.com>
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.18
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: Wed, 11 Jun 2014 17:55:50 -0000

On Tuesday, June 10, 2014 2:00:37 pm grarpamp wrote:
> On Tue, Jun 10, 2014 at 11:58 AM, John Baldwin <jhb@freebsd.org> wrote:
> > Can you do 'frame 7' and 'p *rt' and 'p *rt->rt_ops'?
> 
> (kgdb) frame 7
> #7  0xc13cb9f4 in range_tree_vacate (rt=0xc83dc000, func=0, arg=0x0)
>     at 
/.../src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/range_tree.c:364
> 364                     rt->rt_ops->rtop_vacate(rt, rt->rt_arg);
> (kgdb) p *rt
> $1 = {rt_root = {avl_root = 0xd6900780, avl_compar = 0xc13cb890
> <range_tree_seg_compare>, avl_offset = 0, avl_numnodes = 1, avl_size =
> 48},
>   rt_space = 4294967296, rt_ops = 0x1, rt_arg = 0x0, rt_histogram = {0
> <repeats 64 times>}, rt_lock = 0xc8309000}
> (kgdb) p *rt->rt_ops
> Cannot access memory at address 0x1

Humm, that is the source of the actual fault.  I've no idea why that would
be set to 1 however.  Unfortunately you need someone more familiar with ZFS to 
look at this further.

-- 
John Baldwin