From owner-freebsd-hackers@FreeBSD.ORG Thu Aug 17 12:08:08 2006 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 16EA716A4DA for ; Thu, 17 Aug 2006 12:08:08 +0000 (UTC) (envelope-from anderson@centtech.com) Received: from mh1.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id B9B7943D45 for ; Thu, 17 Aug 2006 12:08:07 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh1.centtech.com (8.13.1/8.13.1) with ESMTP id k7HC86DR063528 for ; Thu, 17 Aug 2006 07:08:07 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <44E45C3F.6060901@centtech.com> Date: Thu, 17 Aug 2006 07:08:31 -0500 From: Eric Anderson User-Agent: Thunderbird 1.5.0.5 (X11/20060802) MIME-Version: 1.0 To: FreeBSD Hackers Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.87.1/1674/Thu Aug 17 01:40:13 2006 on mh1.centtech.com X-Virus-Status: Clean Subject: 6-STABLE snapshot (background fsck) lock-up X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Aug 2006 12:08:08 -0000 I've seen this several times now, but this time I got a dump. Basically, the system comes up after unclean shutdown, throws a bunch of filesystems into the background fsck list, and begins 60 seconds later. After some amount of time, the system will lock up, presumably hung waiting on locks. Here's some info: lock type bufwait: EXCL (count 1) by thread 0xffffff0128812980 (pid 804) lock type getblk: EXCL (count 1) by thread 0xffffff0128812980 (pid 804)Locked vnodes 0xffffff01c5c9f000: tag ufs, type VREG usecount 1, writecount 0, refcount 13656 mountedhere 0 flags (VV_SYSTEM) v_object 0xffffff01b09542a0 ref 0 pages 1691637 lock type snaplk: EXCL (count 1) by thread 0xffffff0128812980 (pid 804) ino 4, on dev label/vol4 How can I use kgdb to get more debugging information from this? Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------