From owner-freebsd-fs@FreeBSD.ORG Wed Jul 6 00:51:34 2011 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 524B0106566B; Wed, 6 Jul 2011 00:51:34 +0000 (UTC) (envelope-from jwd@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 38DA78FC1B; Wed, 6 Jul 2011 00:51:34 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id p660pYZV069625; Wed, 6 Jul 2011 00:51:34 GMT (envelope-from jwd@freefall.freebsd.org) Received: (from jwd@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id p660pYl7069624; Wed, 6 Jul 2011 00:51:34 GMT (envelope-from jwd) Date: Wed, 6 Jul 2011 00:51:34 +0000 From: John To: freebsd-current@freebsd.org, freebsd-fs@freebsd.org Message-ID: <20110706005134.GA60868@FreeBSD.org> References: <20110618043100.GA40745@FreeBSD.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110618043100.GA40745@FreeBSD.org> User-Agent: Mutt/1.4.2.3i Cc: Subject: Re: LOR: vfs_lookup.c:501 ffs_vnops.c:261 vfs_subr.c:2134 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 06 Jul 2011 00:51:34 -0000 Hi Folks, I just updated this particular systems to current as of this evening (2011-07-05 7:22pm EDT) and am still seeing this LOR. lock order reversal: 1st 0xfffffe003c893818 ufs (ufs) @ /usr/src.2011-07-05_7.22pm_EDT/sys/kern/vfs_lookup.c:501 2nd 0xffffff9f0c7eeef8 bufwait (bufwait) @ /usr/src.2011-07-05_7.22pm_EDT/sys/ufs/ffs/ffs_vnops.c:261 3rd 0xfffffe003c8689f8 ufs (ufs) @ /usr/src.2011-07-05_7.22pm_EDT/sys/kern/vfs_subr.c:2134 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a kdb_backtrace() at kdb_backtrace+0x37 _witness_debugger() at _witness_debugger+0x2e witness_checkorder() at witness_checkorder+0x807 __lockmgr_args() at __lockmgr_args+0xd42 ffs_lock() at ffs_lock+0x8c VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b _vn_lock() at _vn_lock+0x47 vget() at vget+0x7b vfs_hash_get() at vfs_hash_get+0xd5 ffs_vgetf() at ffs_vgetf+0x48 softdep_sync_buf() at softdep_sync_buf+0x568 ffs_syncvnode() at ffs_syncvnode+0x293 ffs_truncate() at ffs_truncate+0x4c4 ufs_direnter() at ufs_direnter+0x6ed ufs_makeinode() at ufs_makeinode+0x250 VOP_CREATE_APV() at VOP_CREATE_APV+0x8d vn_open_cred() at vn_open_cred+0x46a kern_openat() at kern_openat+0x17f syscallenter() at syscallenter+0x1aa syscall() at syscall+0x4c Xfast_syscall() at Xfast_syscall+0xdd --- syscall (5, FreeBSD ELF64, open), rip = 0x800936b9c, rsp = 0x7fffffffdac8, rbp = 0 --- Cross-posting to -fs for more visibility. Thoughts welcome. -John ----- John's Original Message ----- > Hi folks, > > I'm seeing the following LOR in dmesg after my latest update this evening. > > # uname -a > FreeBSD zfscarp3p 9.0-CURRENT FreeBSD 9.0-CURRENT #0: Fri Jun 17 22:36:45 EDT 2011 root@zfscarp3p/usr/obj/usr/src.2011-06-17_9.36pm_EDT/sys/GENERIC amd6 > > WARNING: WITNESS option enabled, expect reduced performance. > Trying to mount root from ufs:/dev/da56s1a [rw]... > lock order reversal: > 1st 0xfffffe003d2f9278 ufs (ufs) @ /usr/src.2011-06-17_9.36pm_EDT/sys/kern/vfs_lookup.c:501 > 2nd 0xffffff9f0c7f0e58 bufwait (bufwait) @ /usr/src.2011-06-17_9.36pm_EDT/sys/ufs/ffs/ffs_vnops.c:261 > 3rd 0xfffffe003d371278 ufs (ufs) @ /usr/src.2011-06-17_9.36pm_EDT/sys/kern/vfs_subr.c:2134 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a > kdb_backtrace() at kdb_backtrace+0x37 > _witness_debugger() at _witness_debugger+0x2e > witness_checkorder() at witness_checkorder+0x807 > __lockmgr_args() at __lockmgr_args+0xd42 > ffs_lock() at ffs_lock+0x8c > VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b > _vn_lock() at _vn_lock+0x47 > vget() at vget+0x7b > vfs_hash_get() at vfs_hash_get+0xd5 > ffs_vgetf() at ffs_vgetf+0x48 > softdep_sync_buf() at softdep_sync_buf+0x56a > ffs_syncvnode() at ffs_syncvnode+0x293 > ffs_truncate() at ffs_truncate+0x4c4 > ufs_direnter() at ufs_direnter+0x6ed > ufs_makeinode() at ufs_makeinode+0x250 > VOP_CREATE_APV() at VOP_CREATE_APV+0x8d > vn_open_cred() at vn_open_cred+0x46a > kern_openat() at kern_openat+0x17f > syscallenter() at syscallenter+0x1aa > syscall() at syscall+0x4c > Xfast_syscall() at Xfast_syscall+0xdd > --- syscall (5, FreeBSD ELF64, open), rip = 0x800936b7c, rsp = 0x7fffffffdac8, rbp = 0 --- > bce1: Gigabit link up! > > Only seems to happen once at boot time. > > Thanks, > John