From owner-freebsd-questions@FreeBSD.ORG Fri May 16 16:18:19 2008 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 016C1106566C for ; Fri, 16 May 2008 16:18:19 +0000 (UTC) (envelope-from cjk32@cam.ac.uk) Received: from ppsw-1.csi.cam.ac.uk (ppsw-1.csi.cam.ac.uk [131.111.8.131]) by mx1.freebsd.org (Postfix) with ESMTP id BBE008FC15 for ; Fri, 16 May 2008 16:18:18 +0000 (UTC) (envelope-from cjk32@cam.ac.uk) X-Cam-SpamDetails: Not scanned X-Cam-AntiVirus: No virus found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from gw.cjkey.org.uk ([88.97.163.222]:1323 helo=[192.168.2.186]) by ppsw-1.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.151]:465) with esmtpsa (PLAIN:cjk32) (TLSv1:DHE-RSA-AES256-SHA:256) id 1Jx2dL-0001pm-3X (Exim 4.67) for questions@freebsd.org (return-path ); Fri, 16 May 2008 17:18:15 +0100 Message-ID: <482DB3C6.5010200@cam.ac.uk> Date: Fri, 16 May 2008 17:18:14 +0100 From: Christopher Key User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) MIME-Version: 1.0 To: questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Subject: FreeBSD 6.3 Panic X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 May 2008 16:18:19 -0000 Hello, I've recently started getting kernel panics with a FreeBSD 6.3 machine, using a minimal i386 custom kernel. I don't believe it's a hardware issue as they always seem to coincide with a crash on SqueezeCenter, apparently during heavy usage of the MySQL backend. I'm unable to get a crash dump. After the panic, all I get in the console is, Fatal trap 12: page fault while in kernel mode cpuid = 1; apic id = 01 fault virtual address = 0x5c05df fault code = supervisor read, page not present instruction pointer = 0x20:0xc05bc0a0 stack pointer = 0x28:0xe8c178e0 frame pointer = 0x28:0xe8c178ec code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 50243 (perl) trap number = 12 panic: page fault cpuid = 1 Uptime: 1d20h16m14s Dumping 2021 MB (6 chunks) chunk 0: 1MB (142 pages) ... ok chunk 1: 2021MB (517262 pages) and it then sits apparently indefinitely with no disk activity, and needs a hard reboot. At startup, no dump is found, Checking for core dump on /dev/mirror/gm0s1b... savecore: no dumps found I have "dumpdev=AUTO" in my rc.conf, which gives the message, kernel dumps on /dev/mirror/gm0s1b swapon: adding /dev/mirror/gm0s1b as swap device Is using a gmirrored swap partition for a dump device supported? Can anyone suggest what I should be doing to try to get a crash dump successfully to further diagnose this? Is there anything else relevant I should post? Regards, Chris