From owner-freebsd-alpha@FreeBSD.ORG Mon Feb 13 18:19:27 2006 Return-Path: X-Original-To: freebsd-alpha@freebsd.org Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B81FD16A42C for ; Mon, 13 Feb 2006 18:19:27 +0000 (GMT) (envelope-from jhb@freebsd.org) Received: from speedfactory.net (mail6.speedfactory.net [66.23.216.219]) by mx1.FreeBSD.org (Postfix) with ESMTP id 477BA43D70 for ; Mon, 13 Feb 2006 18:19:11 +0000 (GMT) (envelope-from jhb@freebsd.org) Received: from server.baldwin.cx (unverified [66.23.211.162]) by speedfactory.net (SurgeMail 3.5b3) with ESMTP id 8364900 for multiple; Mon, 13 Feb 2006 13:18:19 -0500 Received: from localhost (john@localhost [127.0.0.1]) by server.baldwin.cx (8.13.4/8.13.4) with ESMTP id k1DIIkik050977; Mon, 13 Feb 2006 13:18:56 -0500 (EST) (envelope-from jhb@freebsd.org) From: John Baldwin To: freebsd-alpha@freebsd.org Date: Mon, 13 Feb 2006 13:09:54 -0500 User-Agent: KMail/1.9.1 References: <87u0b35fwp.wl%rand@meridian-enviro.com> In-Reply-To: <87u0b35fwp.wl%rand@meridian-enviro.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200602131309.55865.jhb@freebsd.org> X-Virus-Scanned: ClamAV 0.87.1/1286/Mon Feb 13 06:41:56 2006 on server.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-0.7 required=4.2 tests=ALL_TRUSTED,AWL, PERCENT_RANDOM autolearn=ham version=3.1.0 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on server.baldwin.cx X-Server: High Performance Mail Server - http://surgemail.com r=1653887525 Cc: Subject: Re: SMP problem on UP2000+ X-BeenThere: freebsd-alpha@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the Alpha List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 13 Feb 2006 18:19:27 -0000 On Monday 13 February 2006 12:26, Douglas K. Rand wrote: > I have a UP2000+ system from Microway with two 833 MHz CPUs, and it > keeps freezing up on me when I run it with a SMP kernel. The hangs > always seem to come at times of high disk IO, such as nightly backups > or heavy MySQL usage or buildworlds. (The system does my cacti > resource graphing.) I've got a debug kernel installed, but I can > never break into the kernel nor do I ever get a core dump. I've > experienced this problem with both 6.0 and 6_RELENG. > > I'm coming up on 4 days of uptime with a kernel that doesn't have SMP > which is easily four times that of a kernel with SMP. > > I was running a gmirror of two 75 GB SCSI disks on the onboard > controller, and to simply see if it was a factor I destroyed the > mirror and am now only using one disk. I had hangs both with and with > gmirror. > > Here are the messgaes I get on the console, when I get them. Sometimes > the system simply hangs. > > panic: lockmgr: thread 0xfffffc007d9c4d20, not exclusive lock holder > 0xfffffc007d9d5260 unlocking cpuid = 1 Have you tried disabling debug.mpsafevfs? Set it to 0 in the loader. -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org