From owner-freebsd-bugs@FreeBSD.ORG Thu Nov 6 08:20:02 2008 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0B2101065679 for ; Thu, 6 Nov 2008 08:20:02 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id DC0FC8FC1B for ; Thu, 6 Nov 2008 08:20:01 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id mA68K1Pp030634 for ; Thu, 6 Nov 2008 08:20:01 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.3/8.14.3/Submit) id mA68K1CK030633; Thu, 6 Nov 2008 08:20:01 GMT (envelope-from gnats) Resent-Date: Thu, 6 Nov 2008 08:20:01 GMT Resent-Message-Id: <200811060820.mA68K1CK030633@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Sun Chang-Ming Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B81D81065675 for ; Thu, 6 Nov 2008 08:19:42 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [IPv6:2001:4f8:fff6::21]) by mx1.freebsd.org (Postfix) with ESMTP id A6F088FC0C for ; Thu, 6 Nov 2008 08:19:42 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.14.3/8.14.3) with ESMTP id mA68JgRN050419 for ; Thu, 6 Nov 2008 08:19:42 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.3/8.14.3/Submit) id mA68Jgt7050418; Thu, 6 Nov 2008 08:19:42 GMT (envelope-from nobody) Message-Id: <200811060819.mA68Jgt7050418@www.freebsd.org> Date: Thu, 6 Nov 2008 08:19:42 GMT From: Sun Chang-Ming To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: kern/128633: lock order reversal in zfs X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 06 Nov 2008 08:20:02 -0000 >Number: 128633 >Category: kern >Synopsis: lock order reversal in zfs >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Nov 06 08:20:01 UTC 2008 >Closed-Date: >Last-Modified: >Originator: Sun Chang-Ming >Release: 8.0-CURRENT-200810 >Organization: Perfect World Co.,Ltd. >Environment: FreeBSD localhost.localdomain 8.0-CURRENT-200810 FreeBSD 8.0-CURRENT-200810 #0: Wed Oct 15 05:16:07 UTC 2008 root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 >Description: When I was booting my system,I saw some warnings of lock order reversal. Please see the attachment for details. >How-To-Repeat: I don't know >Fix: I don't know Patch attached with submission follows: Trying to mount root from zfs:upool lock order reversal: 1st 0xc3877000 vfslock (vfslock) @ /usr/src/sys/kern/vfs_subr.c:372 2nd 0xc373adf4 devfs (devfs) @ /usr/src/sys/kern/vfs_lookup.c:428 3rd 0xc3876d34 vfslock (vfslock) @ /usr/src/sys/kern/vfs_subr.c:372 KDB: stack backtrace: db_trace_self_wrapper(c0bc5e25,c3276828,c0838f75,4,c0bc17b5,...) at db_trace_self_wrapper+0x26 kdb_backtrace(4,c0bc17b5,c3876d34,c3523458,c3276880,...) at kdb_backtrace+0x29 _witness_debugger(c0bc86f3,c3876d34,c0bcef54,c3523458,c0bcf4f9,...) at _witness_debugger+0x25 witness_checkorder(c3876d34,1,c0bcf4f9,174,0,...) at witness_checkorder+0x800 __lockmgr_args(c3876d34,200100,c3876d50,0,0,...) at __lockmgr_args+0x237 vfs_busy(c3876d34,200,0,c373ae10,c109bc80,...) at vfs_busy+0x1bc vfs_mount_alloc(c373ad9c,c109bc80,c384e1a0,c3539700,c37bd960,...) at vfs_mount_alloc+0x74 vfs_donmount(c3574d20,4001,c3276b50,c385e540,6,...) at vfs_donmount+0x1262 kernel_mount(c37bdc50,4001,c387a100,ffffffff,c3276bc0) at kernel_mount+0x84 kernel_vmount(4001,c0bcf143,c3571320,c0bcf152,c0bbc3d6,...) at kernel_vmount+0x63 vfs_mountroot_try(c0bcf455,c0bbc3d6,c0bb4490,1,c0879450,...) at vfs_mountroot_try+0x132 vfs_mountroot(c0d10ad0,4,c0bbd72b,265,c3574d20,...) at vfs_mountroot+0x418 start_init(0,c3276d38,c0bbf107,322,c3572d0c,...) at start_init+0x65 fork_exit(c07c0b00,0,c3276d38) at fork_exit+0xb8 fork_trampoline() at fork_trampoline+0x8 --- trap 0, eip = 0, esp = 0xc3276d70, ebp = 0 --- lock order reversal: 1st 0xc373a8b8 zfs (zfs) @ /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c:1123 2nd 0xc3877000 vfslock (vfslock) @ /usr/src/sys/kern/vfs_subr.c:372 KDB: stack backtrace: db_trace_self_wrapper(c0bc5e25,c32768f4,c0838f75,4,c0bc17b5,...) at db_trace_self_wrapper+0x26 kdb_backtrace(4,c0bc17b5,c0bcf4f9,c3523458,c327694c,...) at kdb_backtrace+0x29 _witness_debugger(c0bc86da,c3877000,c0bcef54,c3523458,c0bcf4f9,...) at _witness_debugger+0x25 witness_checkorder(c3877000,1,c0bcf4f9,174,0,...) at witness_checkorder+0x800 __lockmgr_args(c3877000,200100,c387701c,0,0,...) at __lockmgr_args+0x237 vfs_busy(c3877000,0,0,1ac,c3276b24,...) at vfs_busy+0x1bc lookup(c3276b0c,c0bcec00,d4,bc,c353982c,...) at lookup+0x7bd namei(c3276b0c,c3276b24,c0838dbc,c0e51548,c0bcf29b,...) at namei+0x44b kern_unlinkat(c3574d20,ffffff9c,c0bcf29b,1,c3276c5c,...) at kern_unlinkat+0x46 kern_unlink(c3574d20,c0bcf29b,1,631,c0bbc3d6,...) at kern_unlink+0x27 vfs_mountroot_try(c0bcf455,c0bbc3d6,c0bb4490,1,c0879450,...) at vfs_mountroot_try+0x46e vfs_mountroot(c0d10ad0,4,c0bbd72b,265,c3574d20,...) at vfs_mountroot+0x418 start_init(0,c3276d38,c0bbf107,322,c3572d0c,...) at start_init+0x65 fork_exit(c07c0b00,0,c3276d38) at fork_exit+0xb8 fork_trampoline() at fork_trampoline+0x8 --- trap 0, eip = 0, esp = 0xc3276d70, ebp = 0 --- lock order reversal: 1st 0xc3578044 user map (user map) @ /usr/src/sys/vm/vm_map.c:3115 2nd 0xc373a6a0 zfs (zfs) @ /usr/src/sys/kern/vfs_subr.c:2049 KDB: stack backtrace: db_trace_self_wrapper(c0bc5e25,c327691c,c0838f75,4,c0bc17b5,...) at db_trace_self_wrapper+0x26 kdb_backtrace(4,c0bc17b5,c0bcf4f9,c3523660,c3276974,...) at kdb_backtrace+0x29 _witness_debugger(c0bc86da,c373a6a0,c109790d,c3523660,c0bcf4f9,...) at _witness_debugger+0x25 witness_checkorder(c373a6a0,1,c0bcf4f9,801,0,...) at witness_checkorder+0x800 __lockmgr_args(c373a6a0,200501,c373a6bc,0,0,...) at __lockmgr_args+0x237 vop_stdlock(c3276a78,c0bea9cd,c0bbc3d4,200501,c373a648,...) at vop_stdlock+0x62 VOP_LOCK1_APV(c109bd20,c3276a78,c0cdd0c0,c373a648,200501,...) at VOP_LOCK1_APV+0xa5 _vn_lock(c373a648,200501,c0bcf4f9,801,4,...) at _vn_lock+0x5e vget(c373a648,200501,c3574d20,4b4,0,...) at vget+0xc9 vnode_pager_lock(c1866c98,0,c0be7f93,127,c3276c18,...) at vnode_pager_lock+0x1e0 vm_fault(c3578000,80db000,2,8,80db020,...) at vm_fault+0x1df trap_pfault(5,0,c0bf7580,2f5,c3572d0c,...) at trap_pfault+0x118 trap(c3276d38) at trap+0x289 calltrap() at calltrap+0x6 --- trap 0xc, eip = 0x80480e5, esp = 0xbfbfeef0, ebp = 0xbfbfef10 --- >Release-Note: >Audit-Trail: >Unformatted: