From owner-freebsd-fs@FreeBSD.ORG Sun Oct 8 17:01:59 2006 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4CC0916A403 for ; Sun, 8 Oct 2006 17:01:59 +0000 (UTC) (envelope-from scottl@samsco.org) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.FreeBSD.org (Postfix) with ESMTP id A420D43D49 for ; Sun, 8 Oct 2006 17:01:56 +0000 (GMT) (envelope-from scottl@samsco.org) Received: from [192.168.254.14] (imini.samsco.home [192.168.254.14]) (authenticated bits=0) by pooker.samsco.org (8.13.4/8.13.4) with ESMTP id k98H1lPM025130; Sun, 8 Oct 2006 11:01:52 -0600 (MDT) (envelope-from scottl@samsco.org) Message-ID: <45292EFA.4060903@samsco.org> Date: Sun, 08 Oct 2006 11:01:46 -0600 From: Scott Long User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7.7) Gecko/20050416 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Kris Kennaway References: <20061008152213.59247.qmail@web30307.mail.mud.yahoo.com> <20061008165823.GA2061@xor.obsecurity.org> In-Reply-To: <20061008165823.GA2061@xor.obsecurity.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.4 required=3.8 tests=ALL_TRUSTED autolearn=failed version=3.1.1 X-Spam-Checker-Version: SpamAssassin 3.1.1 (2006-03-10) on pooker.samsco.org Cc: freebsd-fs@freebsd.org Subject: Re: 2 bonnies can stop disk activity permanently X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Oct 2006 17:01:59 -0000 Kris Kennaway wrote: > On Sun, Oct 08, 2006 at 08:22:13AM -0700, R. B. Riddick wrote: > >>Hi! >> >>We (me and Veronica) mentioned, that starting 2 bonnie (ports/bench) processes on a UFS >>1. on a geom_bsd, geom_disk (like ad4 or da0) and geom_stripe (using ad4a, ..., ad10a) >>2. with different controllers areca and nVidia and different motherboards and >>3. with up to 8 SATA disks >>results in a permanently disk-dead system. >> >> >>Veronica's box had more than 700MB of free memory (according to top), when it happened. >> >>Heavy load (caused by blogbench, rawio, raidtest and dd) causes no problem, while bonnie gets stuck somewhere between putc phase and end of rewrite phase. >> >>The bonnie processes were blocked due to "nbufkv" (some VFS reason). >>Geom activity is impossible then (no file system activity happens). >>No syslog message can be seen on the console. > > > You forgot to even mention what version you're running ;-) > > Also show your kernel config file. Configure DDB per the chapter on > kernel debugging in the developers handbook, break to DDB from the > console or serial console, then show us what processes are running and > what are their backtraces. > > Kris No need for all of that information, the bug in vfs_bio.c is quite obvious. =-( Fixing it will take some thought, though. Scott