From owner-freebsd-current@FreeBSD.ORG Tue Aug 16 04:05:20 2011 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 26E25106566C; Tue, 16 Aug 2011 04:05:20 +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 F240A8FC12; Tue, 16 Aug 2011 04:05:19 +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 p7G45J7v058575; Tue, 16 Aug 2011 04:05:19 GMT (envelope-from jwd@freefall.freebsd.org) Received: (from jwd@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id p7G45JxW058574; Tue, 16 Aug 2011 04:05:19 GMT (envelope-from jwd) Date: Tue, 16 Aug 2011 04:05:19 +0000 From: John To: freebsd-fs@freebsd.org Message-ID: <20110816040519.GA49864@FreeBSD.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.2.3i Cc: freebsd-current@freebsd.org Subject: Three LOR with latest -current 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, 16 Aug 2011 04:05:20 -0000 Hi folks, I'm seeing 3 lock order reversals with an up-to-date -current system. Stock system, GENERIC kernel. Let me know if this isn't enough information. Just booting the system and the dmesg. Thanks, John lock order reversal: 1st 0xfffffe0289627db8 ufs (ufs) @ /usr/src.2011-08-14_10.53pm_EDT/sys/ufs/ffs/ffs_snapshot.c:425 2nd 0xffffff9f0db49778 bufwait (bufwait) @ /usr/src.2011-08-14_10.53pm_EDT/sys/kern/vfs_bio.c:2658 3rd 0xfffffe00404a8098 ufs (ufs) @ /usr/src.2011-08-14_10.53pm_EDT/sys/ufs/ffs/ffs_snapshot.c:546 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+0xdc6 ffs_lock() at ffs_lock+0x8c VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b _vn_lock() at _vn_lock+0x47 ffs_snapshot() at ffs_snapshot+0x1c31 ffs_mount() at ffs_mount+0xa24 vfs_donmount() at vfs_donmount+0xddc nmount() at nmount+0x63 syscallenter() at syscallenter+0x1aa syscall() at syscall+0x4c Xfast_syscall() at Xfast_syscall+0xdd --- syscall (378, FreeBSD ELF64, nmount), rip = 0x800abde1c, rsp = 0x7fffffffd968, rbp = 0x801008130 --- lock order reversal: 1st 0xffffff9f0db49778 bufwait (bufwait) @ /usr/src.2011-08-14_10.53pm_EDT/sys/kern/vfs_bio.c:2658 2nd 0xfffffe004034dcb0 snaplk (snaplk) @ /usr/src.2011-08-14_10.53pm_EDT/sys/ufs/ffs/ffs_snapshot.c:818 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+0xdc6 ffs_lock() at ffs_lock+0x8c VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b _vn_lock() at _vn_lock+0x47 ffs_snapshot() at ffs_snapshot+0x1b0c ffs_mount() at ffs_mount+0xa24 vfs_donmount() at vfs_donmount+0xddc nmount() at nmount+0x63 syscallenter() at syscallenter+0x1aa syscall() at syscall+0x4c Xfast_syscall() at Xfast_syscall+0xdd --- syscall (378, FreeBSD ELF64, nmount), rip = 0x800abde1c, rsp = 0x7fffffffd968, rbp = 0x801008130 --- lock order reversal: 1st 0xfffffe004034dcb0 snaplk (snaplk) @ /usr/src.2011-08-14_10.53pm_EDT/sys/kern/vfs_vnops.c:301 2nd 0xfffffe0289627db8 ufs (ufs) @ /usr/src.2011-08-14_10.53pm_EDT/sys/ufs/ffs/ffs_snapshot.c:1620 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+0xdc6 ffs_snapremove() at ffs_snapremove+0xe7 ffs_truncate() at ffs_truncate+0x302 ufs_inactive() at ufs_inactive+0x260 vinactive() at vinactive+0x72 vputx() at vputx+0x386 vn_close() at vn_close+0x118 vn_closefile() at vn_closefile+0x5a _fdrop() at _fdrop+0x23 closef() at closef+0x5c kern_close() at kern_close+0x121 syscallenter() at syscallenter+0x1aa syscall() at syscall+0x4c Xfast_syscall() at Xfast_syscall+0xdd --- syscall (6, FreeBSD ELF64, close), rip = 0x800b5e2bc, rsp = 0x7fffffffd968, rbp = 0 ---