From owner-freebsd-current@FreeBSD.ORG Tue Mar 18 14:29:13 2008 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0E1BC106566C for ; Tue, 18 Mar 2008 14:29:13 +0000 (UTC) (envelope-from roberthuff@rcn.com) Received: from smtp02.lnh.mail.rcn.net (smtp02.lnh.mail.rcn.net [207.172.157.102]) by mx1.freebsd.org (Postfix) with ESMTP id A026D8FC1E for ; Tue, 18 Mar 2008 14:29:12 +0000 (UTC) (envelope-from roberthuff@rcn.com) Received: from mr08.lnh.mail.rcn.net ([207.172.157.28]) by smtp02.lnh.mail.rcn.net with ESMTP; 18 Mar 2008 10:00:54 -0400 Received: from smtp01.lnh.mail.rcn.net (smtp01.lnh.mail.rcn.net [207.172.4.11]) by mr08.lnh.mail.rcn.net (MOS 3.8.6-GA) with ESMTP id JUH02254; Tue, 18 Mar 2008 10:00:53 -0400 (EDT) Received: from 209-6-22-188.c3-0.smr-ubr1.sbo-smr.ma.cable.rcn.com (HELO jerusalem.litteratus.org.litteratus.org) ([209.6.22.188]) by smtp01.lnh.mail.rcn.net with ESMTP; 18 Mar 2008 10:01:33 -0500 From: Robert Huff MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <18399.51985.110882.166457@jerusalem.litteratus.org> Date: Tue, 18 Mar 2008 10:00:49 -0400 To: Alex Goncharov In-Reply-To: References: X-Mailer: VM 7.17 under 21.5 (beta28) "fuki" XEmacs Lucid X-Junkmail-Whitelist: YES (by domain whitelist at mr08.lnh.mail.rcn.net) Cc: freebsd-current@freebsd.org Subject: Seeing lock order reversal X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Tue, 18 Mar 2008 14:29:13 -0000 Alex Goncharov writes: > I am trying to source-upgrade one of my 7.0 systems to 8.0-CURRENT. I updated on Friday. > The very first 8.0 build (this morning) gave me the kernel that didn't > boot. Built it again, finishing about 15 minutes ago. This one > booted all right but I see this in `/var/log/messages': > > ================================================================================ > WARNING: WITNESS option enabled, expect reduced performance. > lock order reversal: > 1st 0xc4093e28 devfs (devfs) @ /mnt/wdx/freebsd/8.0/usr/src/sys/kern/vfs_subr.c:2064 > 2nd 0xc4172b54 devfsmount (devfsmount) @ /mnt/wdx/freebsd/8.0/usr/src/sys/fs/devfs/devfs_vnops.c:201 > KDB: stack backtrace: > db_trace_self_wrapper(c0af5d71,e2888bbc,c07a70de,c0af8353,c4172b54,...) at db_trace_self_wrapper+0x26 > kdb_backtrace(c0af8353,c4172b54,c0ae90df,c0ae90df,c0ae9120,...) at kdb_backtrace+0x29 > witness_checkorder(c4172b54,9,c0ae9120,c9,c7,...) at witness_checkorder+0x6de > _sx_xlock(c4172b54,0,c0ae9120,c9,c4172b54,...) at _sx_xlock+0x7d > devfs_allocv(c415db80,c4174000,e2888c28,c3e1ecc0,c0afe288,...) at devfs_allocv+0x144 > devfs_root(c4174000,2,c0c67378,c3e1ecc0,ca,...) at devfs_root+0x51 > set_rootvnode(c0c67360,0,c0afe288,5f4,c07e4aa0,...) at set_rootvnode+0x2b > vfs_mountroot(c0c15270,4,c0aed8e7,264,0,...) at vfs_mountroot+0x356 > start_init(0,e2888d38,c0aef370,30c,c3e1ccd0,...) at start_init+0x65 > fork_exit(c0737740,0,e2888d38) at fork_exit+0xb8 > fork_trampoline() at fork_trampoline+0x8 > --- trap 0, eip = 0, esp = 0xe2888d70, ebp = 0 --- > Trying to mount root from ufs:/dev/ad4s1a > lock order reversal: > 1st 0xc40939e8 ufs (ufs) @ /mnt/wdx/freebsd/8.0/usr/src/sys/kern/vfs_subr.c:2064 > 2nd 0xc4174000 vfslock (vfslock) @ /mnt/wdx/freebsd/8.0/usr/src/sys/kern/vfs_subr.c:364 > KDB: stack backtrace: > db_trace_self_wrapper(c0af5d71,e28889d8,c07a70de,c0af8353,c4174000,...) at db_trace_self_wrapper+0x26 > kdb_backtrace(c0af8353,c4174000,c0afe39a,c0afe39a,c0afe937,...) at kdb_backtrace+0x29 > witness_checkorder(c4174000,1,c0afe937,16c,e2888a18,...) at witness_checkorder+0x6de > _lockmgr_args(c4174000,20001,c4174030,0,ffffffff,...) at _lockmgr_args+0x1d5 > vfs_busy(c4174000,0,0,c3e1ecc0,e2888b58,...) at vfs_busy+0x1b0 > lookup(e2888b44,c0afe022,c6,bf,c3dee22c,...) at lookup+0x7bf > namei(e2888b44,c4174030,1c1,c0afe288,e2888b54,...) at namei+0x34b > kern_unlink(c3e1ecc0,c0afe6d9,1,62f,0,...) at kern_unlink+0x40 > vfs_mountroot_try(c0afe893,c0aec557,c0ae4ade,1,c07e4aa0,...) at vfs_mountroot_try+0x470 > vfs_mountroot(c0c15270,4,c0aed8e7,264,0,...) at vfs_mountroot+0x418 > start_init(0,e2888d38,c0aef370,30c,c3e1ccd0,...) at start_init+0x65 > fork_exit(c0737740,0,e2888d38) at fork_exit+0xb8 > fork_trampoline() at fork_trampoline+0x8 > --- trap 0, eip = 0, esp = 0xe2888d70, ebp = 0 --- > lock order reversal: > 1st 0xc3e22044 user map (user map) @ /mnt/wdx/freebsd/8.0/usr/src/sys/vm/vm_map.c:3111 > 2nd 0xc40937c8 ufs (ufs) @ /mnt/wdx/freebsd/8.0/usr/src/sys/kern/vfs_subr.c:2064 > KDB: stack backtrace: > db_trace_self_wrapper(c0af5d71,e28889c4,c07a70de,c0af8353,c40937c8,...) at db_trace_self_wrapper+0x26 > kdb_backtrace(c0af8353,c40937c8,c0aece96,c0aece96,c0afe937,...) at kdb_backtrace+0x29 > witness_checkorder(c40937c8,1,c0afe937,810,e28889e8,...) at witness_checkorder+0x6de > _lockmgr_args(c40937c8,30041,c40937f8,0,ffffffff,...) at _lockmgr_args+0x1d5 > ffs_lock(e2888a78,c075fc3d,c0c20554,30041,c4093770,...) at ffs_lock+0xa3 > VOP_LOCK1_APV(c0bcbec0,e2888a78,c0aec555,3,c40937f8,...) at VOP_LOCK1_APV+0xa5 > _vn_lock(c4093770,30041,c0afe937,810,0,...) at _vn_lock+0xf7 > vget(c4093770,30041,c3e1ecc0,4a9,c1460600,...) at vget+0x10b > vnode_pager_lock(c1460480,0,c0b157d5,127,e2888be8,...) at vnode_pager_lock+0x1ad > vm_fault(c3e22000,80cf000,2,8,80cf340,...) at vm_fault+0x1df > trap_pfault(5,0,c0b23bd2,2c4,c3e1ccd0,...) at trap_pfault+0x118 > trap(e2888d38) at trap+0x259 > calltrap() at calltrap+0x6 > --- trap 0xc, eip = 0x80480e5, esp = 0xbfbfeef0, ebp = 0xbfbfef10 --- I'm gettig both of these as well. It doesn't stop the system from booting, or _seem_ to affect operation ... but it would be nice if they would go away. Robert Huff