From owner-freebsd-fs@freebsd.org  Fri Sep 11 02:56:22 2015
Return-Path: <owner-freebsd-fs@freebsd.org>
Delivered-To: freebsd-fs@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6395FA02292
 for <freebsd-fs@mailman.ysv.freebsd.org>; Fri, 11 Sep 2015 02:56:22 +0000 (UTC)
 (envelope-from bdrewery@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
 [IPv6:2001:1900:2254:206c::16:87])
 by mx1.freebsd.org (Postfix) with ESMTP id 522521298
 for <freebsd-fs@freebsd.org>; Fri, 11 Sep 2015 02:56:22 +0000 (UTC)
 (envelope-from bdrewery@FreeBSD.org)
Received: from mail.xzibition.com (localhost [IPv6:::1])
 by freefall.freebsd.org (Postfix) with ESMTP id 4B4D31B62
 for <freebsd-fs@freebsd.org>; Fri, 11 Sep 2015 02:56:22 +0000 (UTC)
 (envelope-from bdrewery@FreeBSD.org)
Received: from mail.xzibition.com (localhost [172.31.3.2])
 by mail.xzibition.com (Postfix) with ESMTP id 06EE010B26
 for <freebsd-fs@freebsd.org>; Fri, 11 Sep 2015 02:56:22 +0000 (UTC)
X-Virus-Scanned: amavisd-new at mail.xzibition.com
Received: from mail.xzibition.com ([172.31.3.2])
 by mail.xzibition.com (mail.xzibition.com [172.31.3.2]) (amavisd-new,
 port 10026) with LMTP id eVam36w0sDF8 for <freebsd-fs@freebsd.org>;
 Fri, 11 Sep 2015 02:56:20 +0000 (UTC)
To: freebsd-fs@freebsd.org
DKIM-Filter: OpenDKIM Filter v2.9.2 mail.xzibition.com B84A410B1B
From: Bryan Drewery <bdrewery@FreeBSD.org>
Subject: ZFS LOR
Organization: FreeBSD
Message-ID: <55F242D1.1030408@FreeBSD.org>
Date: Thu, 10 Sep 2015 19:56:17 -0700
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0)
 Gecko/20100101 Thunderbird/38.2.0
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <https://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: <https://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 11 Sep 2015 02:56:22 -0000

On r287335.

> lock order reversal:
>  1st 0xfffff80866d28068 zfs (zfs) @ /usr/src/sys/kern/vfs_mount.c:1224
>  2nd 0xfffff806a3abca28 zfs_gfs (zfs_gfs) @ /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c:494
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe35557173c0
> witness_checkorder() at witness_checkorder+0xedc/frame 0xfffffe3555717440
> __lockmgr_args() at __lockmgr_args+0xad0/frame 0xfffffe3555717580
> vop_stdlock() at vop_stdlock+0x3c/frame 0xfffffe35557175a0
> VOP_LOCK1_APV() at VOP_LOCK1_APV+0x101/frame 0xfffffe35557175d0
> _vn_lock() at _vn_lock+0xc2/frame 0xfffffe3555717640
> gfs_file_create() at gfs_file_create+0x73/frame 0xfffffe3555717680
> gfs_dir_create() at gfs_dir_create+0x1d/frame 0xfffffe35557176c0
> zfsctl_mknode_snapdir() at zfsctl_mknode_snapdir+0x47/frame 0xfffffe3555717720
> gfs_dir_lookup() at gfs_dir_lookup+0x191/frame 0xfffffe35557177c0
> gfs_vop_lookup() at gfs_vop_lookup+0x1d/frame 0xfffffe35557177e0
> zfsctl_root_lookup() at zfsctl_root_lookup+0xf5/frame 0xfffffe3555717870
> zfsctl_umount_snapshots() at zfsctl_umount_snapshots+0x80/frame 0xfffffe35557178f0
> zfs_umount() at zfs_umount+0x7b/frame 0xfffffe3555717930
> dounmount() at dounmount+0x533/frame 0xfffffe35557179b0
> sys_unmount() at sys_unmount+0x3c0/frame 0xfffffe3555717ae0
> amd64_syscall() at amd64_syscall+0x282/frame 0xfffffe3555717bf0
> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe3555717bf0
> --- syscall (22, FreeBSD ELF64, sys_unmount), rip = 0x80193182a, rsp = 0x7fffffffb518, rbp = 0x7fffffffb570 ---


-- 
Regards,
Bryan Drewery