From owner-freebsd-current@FreeBSD.ORG Tue Nov 10 09:58:59 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BEE141065694 for ; Tue, 10 Nov 2009 09:58:59 +0000 (UTC) (envelope-from gary.jennejohn@freenet.de) Received: from mout7.freenet.de (mout7.freenet.de [IPv6:2001:748:100:40::2:9]) by mx1.freebsd.org (Postfix) with ESMTP id 5574A8FC0A for ; Tue, 10 Nov 2009 09:58:59 +0000 (UTC) Received: from [195.4.92.21] (helo=11.mx.freenet.de) by mout7.freenet.de with esmtpa (ID gary.jennejohn@freenet.de) (port 25) (Exim 4.69 #92) id 1N7nV3-0004aY-RS; Tue, 10 Nov 2009 10:58:57 +0100 Received: from t8597.t.pppool.de ([89.55.133.151]:37628 helo=ernst.jennejohn.org) by 11.mx.freenet.de with esmtpa (ID gary.jennejohn@freenet.de) (port 25) (Exim 4.69 #94) id 1N7nV3-000237-L3; Tue, 10 Nov 2009 10:58:57 +0100 Date: Tue, 10 Nov 2009 10:58:56 +0100 From: Gary Jennejohn To: S.N.Grigoriev Message-ID: <20091110105856.1270038e@ernst.jennejohn.org> In-Reply-To: <6511257846119@webmail85.yandex.ru> References: <1031257439203@webmail57.yandex.ru> <20091105184925.16b55c43@ernst.jennejohn.org> <31221257446063@webmail71.yandex.ru> <20091106101943.5a763f43@ernst.jennejohn.org> <41361257585651@webmail39.yandex.ru> <20091107115256.3df62bc3@ernst.jennejohn.org> <1257618758.1511.14.camel@RabbitsDen> <6511257846119@webmail85.yandex.ru> X-Mailer: Claws Mail 3.7.2 (GTK+ 2.16.2; amd64-portbld-freebsd8.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-current@freebsd.org, "Alexandre \"Sunny\" Kovalenko" Subject: Re: 8.0RC2 amd64 - kernel panic running make buildworld X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: gary.jennejohn@freenet.de List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Nov 2009 09:58:59 -0000 On Tue, 10 Nov 2009 12:41:59 +0300 S.N.Grigoriev wrote: > I followed your tips. The kernel configuration now contains options DDB > and KDB. The sysctl variable 'debug.debugger_on_panic' is set to '1'. > After the 'sysctl debug.kdb.panic=1' command the debugger prompt > appears. > To have a crash dump I should type 'panic' on the debugger prompt. > If I type 'reboot' instead, there are no crash dumps. Is that behaviour > correct? > In this case yes, because you forced the panic by setting the sysctl. > Another question: must all panics go to the bebugger prompt? > They should, if the kernel itself causes the panic. As Alexandre wrote, a hardware problem probably would not cause a kernel panic. I've seen panics like this myself and they were almost always caused by faulty memory. Running "make buildworld" really stresses the system and reveals hardware faults like that. > I still have neither crash dumps nor debugger prompt during > world/kernel compilations. Just reboots. > Are you in the console or running Xorg when it happens? --- Gary Jennejohn