From owner-freebsd-bugs@FreeBSD.ORG Mon Jul 20 21:30:05 2009 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 B07CF1065673 for ; Mon, 20 Jul 2009 21:30:05 +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 6D14A8FC0C for ; Mon, 20 Jul 2009 21:30:05 +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 n6KLU5tk085403 for ; Mon, 20 Jul 2009 21:30:05 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.3/8.14.3/Submit) id n6KLU52a085402; Mon, 20 Jul 2009 21:30:05 GMT (envelope-from gnats) Resent-Date: Mon, 20 Jul 2009 21:30:05 GMT Resent-Message-Id: <200907202130.n6KLU52a085402@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, Rene Ladan Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BB0AE1065673 for ; Mon, 20 Jul 2009 21:20:43 +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 A9D168FC1B for ; Mon, 20 Jul 2009 21:20:43 +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 n6KLKhkw086257 for ; Mon, 20 Jul 2009 21:20:43 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.3/8.14.3/Submit) id n6KLKhG2086256; Mon, 20 Jul 2009 21:20:43 GMT (envelope-from nobody) Message-Id: <200907202120.n6KLKhG2086256@www.freebsd.org> Date: Mon, 20 Jul 2009 21:20:43 GMT From: Rene Ladan To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: kern/136944: [lor] bufwait/snaplk (fsync) 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: Mon, 20 Jul 2009 21:30:05 -0000 >Number: 136944 >Category: kern >Synopsis: [lor] bufwait/snaplk (fsync) >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: Mon Jul 20 21:30:05 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Rene Ladan >Release: 8.0-BETA2 amd64 >Organization: >Environment: FreeBSD self.rene-ladan.nl 8.0-BETA2 FreeBSD 8.0-BETA2 #0: Wed Jul 15 21:48:41 UTC 2009 root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 >Description: lock order reversal: 1st 0xffffff8029490410 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2558 2nd 0xffffff0078f4a130 snaplk (snaplk) @ /usr/src/sys/ufs/ffs/ffs_snapshot.c:2223 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a _witness_debugger() at _witness_debugger+0x2e witness_checkorder() at witness_checkorder+0x81e __lockmgr_args() at __lockmgr_args+0xcf3 ffs_copyonwrite() at ffs_copyonwrite+0x189 ffs_geom_strategy() at ffs_geom_strategy+0x1b5 bufwrite() at bufwrite+0x106 ffs_update() at ffs_update+0x1bd ffs_fsync() at ffs_fsync+0x43 fsync() at fsync+0x148 syscall() at syscall+0x1af Xfast_syscall() at Xfast_syscall+0xe1 --- syscall (95, FreeBSD ELF64, fsync), rip = 0x80084cd0c, rsp = 0x7fffffffdcb8, rbp = 0x1 --- >How-To-Repeat: GENERIC kernel, only devfs and UFS2 filesystems mounted via /dev/ad* (/ , /var, /tmp, /usr) >Fix: >Release-Note: >Audit-Trail: >Unformatted: