From owner-freebsd-current@freebsd.org Sat Feb 20 12:48:02 2016 Return-Path: Delivered-To: freebsd-current@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 BACF3AAE232 for ; Sat, 20 Feb 2016 12:48:02 +0000 (UTC) (envelope-from ler@lerctr.org) Received: from thebighonker.lerctr.org (thebighonker.lerctr.org [IPv6:2001:470:1f0f:3ad:223:7dff:fe9e:6e8a]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "thebighonker.lerctr.org", Issuer "COMODO RSA Domain Validation Secure Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9CC56AF5 for ; Sat, 20 Feb 2016 12:48:02 +0000 (UTC) (envelope-from ler@lerctr.org) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lerctr.org; s=lerami; h=Message-ID:Subject:To:From:Date:Content-Transfer-Encoding: Content-Type:MIME-Version; bh=UszteKBugJBvrDdMCX8Ji/Snzsjd7hoazRSO9Wp9xII=; b=Mys9AZxcAnTFUnhjtfjWrYK5+oCmuwmO8l1OeDSL1QLMm4+dpuC+H+cLFNJWRwcosNFkHAHC71 IoC04mHMgRtHx6dqHvnX8VGQgCFPK9+UK1hvMOmsfPHvi/8UxcJT3fjFKGfJxara4vesJZ1d2YCUg rTE6aIDDJO0rWamClrBs=; Received: from thebighonker.lerctr.org ([2001:470:1f0f:3ad:223:7dff:fe9e:6e8a]:54899 helo=webmail.lerctr.org) by thebighonker.lerctr.org with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.86 (FreeBSD)) (envelope-from ) id 1aX6x7-000ILL-Pj for freebsd-current@freebsd.org; Sat, 20 Feb 2016 06:48:01 -0600 Received: from 2605:6000:ec17:200:20a8:2140:b873:6ca9 by webmail.lerctr.org with HTTP (HTTP/1.1 POST); Sat, 20 Feb 2016 06:48:01 -0600 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Sat, 20 Feb 2016 06:48:01 -0600 From: Larry Rosenman To: Freebsd current Subject: LOR: ZFS/syncer: on mount of msdosfs Message-ID: X-Sender: ler@lerctr.org User-Agent: Roundcube Webmail/1.1.4 X-Spam-Score: -1.0 (-) X-LERCTR-Spam-Score: -1.0 (-) X-Spam-Report: SpamScore (-1.0/5.0) ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 X-LERCTR-Spam-Report: SpamScore (-1.0/5.0) ALL_TRUSTED=-1, SHORTCIRCUIT=-0.0001 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 20 Feb 2016 12:48:02 -0000 Is this a known LOR: lock order reversal: 1st 0xfffff801d20ea5f0 zfs (zfs) @ /usr/src/sys/kern/vfs_mount.c:1222 2nd 0xfffff801d2fe6418 syncer (syncer) @ /usr/src/sys/kern/vfs_subr.c:2618 stack backtrace: #0 0xffffffff80a7f810 at witness_debugger+0x70 #1 0xffffffff80a7f711 at witness_checkorder+0xe71 #2 0xffffffff809fe5cb at __lockmgr_args+0xd3b #3 0xffffffff80ac525c at vop_stdlock+0x3c #4 0xffffffff80fbd640 at VOP_LOCK1_APV+0x100 #5 0xffffffff80ae5f2a at _vn_lock+0x9a #6 0xffffffff80ad6c38 at vputx+0x208 #7 0xffffffff80aceaf0 at dounmount+0x410 #8 0xffffffff80ace64d at sys_unmount+0x35d #9 0xffffffff80e6e15b at amd64_syscall+0x2db #10 0xffffffff80e4dd4b at Xfast_syscall+0xfb lock order reversal: 1st 0xfffff801d20ea5f0 zfs (zfs) @ /usr/src/sys/kern/vfs_mount.c:1222 2nd 0xfffff801d2fe65f0 devfs (devfs) @ /usr/src/sys/fs/msdosfs/msdosfs_vfsops.c:994 stack backtrace: #0 0xffffffff80a7f810 at witness_debugger+0x70 #1 0xffffffff80a7f711 at witness_checkorder+0xe71 #2 0xffffffff809fe5cb at __lockmgr_args+0xd3b #3 0xffffffff80ac525c at vop_stdlock+0x3c #4 0xffffffff80fbd640 at VOP_LOCK1_APV+0x100 #5 0xffffffff80ae5f2a at _vn_lock+0x9a #6 0xffffffff809075a3 at msdosfs_sync+0x193 #7 0xffffffff80acebc9 at dounmount+0x4e9 #8 0xffffffff80ace64d at sys_unmount+0x35d #9 0xffffffff80e6e15b at amd64_syscall+0x2db #10 0xffffffff80e4dd4b at Xfast_syscall+0xfb $ uname -a FreeBSD lrosenman-dell 11.0-CURRENT FreeBSD 11.0-CURRENT #1 r295833M: Sat Feb 20 06:13:34 CST 2016 root@lrosenman-dell:/usr/obj/usr/src/sys/GENERIC amd64 $ -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 214-642-9640 E-Mail: ler@lerctr.org US Mail: 7011 W Parmer Ln, Apt 1115, Austin, TX 78729-6961