From owner-freebsd-bugs@freebsd.org Tue Feb 16 13:56:11 2016 Return-Path: Delivered-To: freebsd-bugs@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 B7000AAA858 for ; Tue, 16 Feb 2016 13:56:11 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 9CA331807 for ; Tue, 16 Feb 2016 13:56:11 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id u1GDuBf5039413 for ; Tue, 16 Feb 2016 13:56:11 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 205725] Lock order reversal in gfs_file_create during zfs unmount Date: Tue, 16 Feb 2016 13:56:11 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.0-CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: will@sundivenetworks.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Feb 2016 13:56:11 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D205725 Will Green changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |will@sundivenetworks.com --- Comment #4 from Will Green --- I have seen a similar LOR with GFS when using a file-backed ZFS pool on FreeBSD-11.0-CURRENT-amd64-20160206-r295345.=20 It's easy to reproduce: # dd bs=3D1m count=3D256 if=3D/dev/zero of=3D/tmp/disk1 256+0 records in 256+0 records out 268435456 bytes transferred in 0.266620 secs (1006810670 bytes/sec) # zpool create testpool /tmp/disk1 # zpool destroy testpool Feb 16 13:53:06 fbsd11 ZFS: vdev state changed, pool_guid=3D598835106833283= 5963 vdev_guid=3D14151074118185943762 Feb 16 13:53:14 fbsd11 kernel: lock order reversal: Feb 16 13:53:14 fbsd11 kernel: 1st 0xfffff800370c05f0 zfs (zfs) @ /usr/src/sys/kern/vfs_mount.c:1222 Feb 16 13:53:14 fbsd11 kernel: 2nd 0xfffff8007238b240 zfs_gfs (zfs_gfs) @ /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c:494 Feb 16 13:53:14 fbsd11 kernel: stack backtrace: Feb 16 13:53:14 fbsd11 kernel: #0 0xffffffff80a7fc60 at witness_debugger+0x= 70 Feb 16 13:53:14 fbsd11 kernel: #1 0xffffffff80a7fb61 at witness_checkorder+0xe71 Feb 16 13:53:14 fbsd11 kernel: #2 0xffffffff809ff22b at __lockmgr_args+0xd3b Feb 16 13:53:14 fbsd11 kernel: #3 0xffffffff80ac64fc at vop_stdlock+0x3c Feb 16 13:53:14 fbsd11 kernel: #4 0xffffffff80fbdb00 at VOP_LOCK1_APV+0x100 Feb 16 13:53:14 fbsd11 kernel: #5 0xffffffff80ae71ba at _vn_lock+0x9a Feb 16 13:53:14 fbsd11 kernel: #6 0xffffffff820a2b13 at gfs_file_create+0x73 Feb 16 13:53:14 fbsd11 kernel: #7 0xffffffff820a2bbd at gfs_dir_create+0x1d Feb 16 13:53:14 fbsd11 kernel: #8 0xffffffff8216bf57 at zfsctl_mknode_snapdir+0x47 Feb 16 13:53:14 fbsd11 kernel: #9 0xffffffff820a3135 at gfs_dir_lookup+0x185 Feb 16 13:53:14 fbsd11 kernel: #10 0xffffffff820a361d at gfs_vop_lookup+0x1d Feb 16 13:53:14 fbsd11 kernel: #11 0xffffffff8216af75 at zfsctl_root_lookup+0xf5 Feb 16 13:53:14 fbsd11 kernel: #12 0xffffffff8216be13 at zfsctl_umount_snapshots+0x83 Feb 16 13:53:14 fbsd11 kernel: #13 0xffffffff82184cfb at zfs_umount+0x7b Feb 16 13:53:14 fbsd11 kernel: #14 0xffffffff80acfeb0 at dounmount+0x530 Feb 16 13:53:14 fbsd11 kernel: #15 0xffffffff80acf8ed at sys_unmount+0x35d Feb 16 13:53:14 fbsd11 kernel: #16 0xffffffff80e6f15b at amd64_syscall+0x2db Feb 16 13:53:14 fbsd11 kernel: #17 0xffffffff80e4ed5b at Xfast_syscall+0xfb --=20 You are receiving this mail because: You are the assignee for the bug.=