From owner-freebsd-bugs@FreeBSD.ORG Fri May 14 16:50:06 2010 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 176571065675 for ; Fri, 14 May 2010 16:50:06 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (unknown [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id E55548FC14 for ; Fri, 14 May 2010 16:50:05 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id o4EGo56u084306 for ; Fri, 14 May 2010 16:50:05 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id o4EGo5qF084298; Fri, 14 May 2010 16:50:05 GMT (envelope-from gnats) Resent-Date: Fri, 14 May 2010 16:50:05 GMT Resent-Message-Id: <201005141650.o4EGo5qF084298@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, walter@pelissero.de Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 65E381065670 for ; Fri, 14 May 2010 16:43:04 +0000 (UTC) (envelope-from walter.pelissero@iesy.net) Received: from mail01.ish.de (mailout.ish.de [80.69.98.252]) by mx1.freebsd.org (Postfix) with ESMTP id EB2F98FC08 for ; Fri, 14 May 2010 16:43:03 +0000 (UTC) Received: from [95.222.206.96] (account walter.pelissero@iesy.net HELO zaphod.home.lan) by mail-fe-02.mail01.ish.de (CommuniGate Pro SMTP 5.2.18) with ESMTPSA id 349640998 for FreeBSD-gnats-submit@freebsd.org; Fri, 14 May 2010 18:41:53 +0200 Received: from zaphod.home.lan (localhost [127.0.0.1]) by zaphod.home.lan (8.14.4/8.14.4) with ESMTP id o4EGd4hf004916 for ; Fri, 14 May 2010 18:39:04 +0200 (CEST) (envelope-from wcp@zaphod.home.lan) Received: (from wcp@localhost) by zaphod.home.lan (8.14.4/8.14.4/Submit) id o4EGd38a004915; Fri, 14 May 2010 18:39:03 +0200 (CEST) (envelope-from wcp) Message-Id: <201005141639.o4EGd38a004915@zaphod.home.lan> Date: Fri, 14 May 2010 18:39:03 +0200 (CEST) From: "Walter C. Pelissero" To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Subject: kern/146590: MCA panics 7.3 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: walter@pelissero.de List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 May 2010 16:50:06 -0000 >Number: 146590 >Category: kern >Synopsis: MCA panics 7.3 >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri May 14 16:50:05 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Walter C. Pelissero >Release: FreeBSD 7.3-STABLE i386 >Organization: >Environment: System: FreeBSD zaphod.home.lan 7.3-STABLE FreeBSD 7.3-STABLE #0: Fri May 14 13:43:05 CEST 2010 root@zaphod.home.lan:/usr/src/sys/i386/compile/TIGER-MP i386 >Description: FreeBSD 7.3-STABLE on a Tyan Tiger MP (S2460) panics almost upon loading the kernel. The screen reads something like: real memory = [...] avail memory = [...] ACPI APIC Table: FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs cpu0 (BSP): APIC ID: 1 cpu1 (AP): APIC ID: 0 MCA: Bank 0, Status 0xf662a00000000833 MCA: Global Cap 0x0000000000000104, Status 0x0000000000000004 MCA: Vendor "AuthenticAMD", ID 0x681, APIC ID 1 MCA: CPU 0 UNCOR PCC OVER BUSLG Source DRD Memory MCA: Address 0xe4000 Fatal trap 28: machine check trap while in kernel mode cpuid = 0; apic id = 01 instruction pointer = 0x20:0xc06ebc03 stack pointer = 0x28:0xc0c20d1c frame pointer = 0x28:0xc0c20d44 doce segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, IOPL = 0 current process = 0 [thread pid 0 tid 0 ] Stopped at bios_sigsearch+0x93: leal 0(%ebx,%eax,1),xedx db> This machine had no problem at least until short before 7.3-RELEASE, so I'd rule out an actual hardware error. >How-To-Repeat: Boot a generic kernel on a Tyan Tiger MP (S2460). >Fix: Setting hw.mca.enabled=0 works around the problem. >Release-Note: >Audit-Trail: >Unformatted: