From owner-freebsd-hackers@FreeBSD.ORG Thu Jan 17 13:35:33 2013 Return-Path: Delivered-To: freebsd-hackers@FreeBSD.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 708FBD69; Thu, 17 Jan 2013 13:35:33 +0000 (UTC) (envelope-from ian@FreeBSD.org) Received: from duck.symmetricom.us (duck.symmetricom.us [206.168.13.214]) by mx1.freebsd.org (Postfix) with ESMTP id 2FF1DE56; Thu, 17 Jan 2013 13:35:32 +0000 (UTC) Received: from damnhippie.dyndns.org (daffy.symmetricom.us [206.168.13.218]) by duck.symmetricom.us (8.14.5/8.14.5) with ESMTP id r0HDZWVB090566; Thu, 17 Jan 2013 06:35:32 -0700 (MST) (envelope-from ian@FreeBSD.org) Received: from [172.22.42.240] (revolution.hippie.lan [172.22.42.240]) by damnhippie.dyndns.org (8.14.3/8.14.3) with ESMTP id r0HDZSLB006318; Thu, 17 Jan 2013 06:35:29 -0700 (MST) (envelope-from ian@FreeBSD.org) Subject: Re: Failsafe on kernel panic From: Ian Lepore To: Sami Halabi In-Reply-To: References: <201301161513.27016.jhb@freebsd.org> <1358392725.32417.179.camel@revolution.hippie.lan> Content-Type: text/plain; charset="iso-2022-jp" Date: Thu, 17 Jan 2013 06:35:28 -0700 Message-ID: <1358429728.32417.193.camel@revolution.hippie.lan> Mime-Version: 1.0 X-Mailer: Evolution 2.32.1 FreeBSD GNOME Team Port Content-Transfer-Encoding: 7bit Cc: freebsd-hackers@FreeBSD.org, "freebsd-stable@freebsd.org" X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jan 2013 13:35:33 -0000 On Thu, 2013-01-17 at 08:38 +0200, Sami Halabi wrote: > btw: i don't see any options in my kernel config for KBD / Unatteneded , th > eonly thing that mention its > is: device ukbd > > Sami I think if you don't have any kdb options turned on, then a panic should automatically store a crashdump to swap, then reboot the machine. If that's not working, perhaps it locks up trying to store the dump? If the hardware has a watchdog timer, enabling that might be the best way to ensure a reboot on any kind of crash or hang. -- Ian > On Thu, Jan 17, 2013 at 6:45 AM, Sami Halabi wrote: > > > Its only a kernel option? There is no flag to pass to the loader? > > > > SAMI <> 17 2013 05:18, "Ian Lepore" : > > > > On Wed, 2013-01-16 at 23:27 +0200, Sami Halabi wrote: > >> > Thank you for your response, very helpful. > >> > one question - how do i configure auto-reboot once kernel panic occurs? > >> > > >> > Sami > >> > > >> > >> From src/sys/conf/NOTES, this may be what you're looking for... > >> > >> # > >> # Don't enter the debugger for a panic. Intended for unattended operation > >> # where you may want to enter the debugger from the console, but still > >> want > >> # the machine to recover from a panic. > >> # > >> options KDB_UNATTENDED > >> > >> But I think it only has meaning if you have option KDB in effect, > >> otherwise it should just reboot itself after a 15 second pause. > >> > >> -- Ian > >> > >> > >> > >> > >> > >> > >> > > >> > On Wed, Jan 16, 2013 at 10:13 PM, John Baldwin wrote: > >> > > >> > > On Wednesday, January 16, 2013 2:25:33 pm Sami Halabi wrote: > >> > > > Hi everyone, > >> > > > I have a production box, in which I want to install new kernel > >> without > >> > > any > >> > > > remotd kvn. > >> > > > my problem is its 2 hours away, and if a kernel panic occurs I got a > >> > > > problem. > >> > > > I woner if I can seg failsafe script to load the old kernel in case > >> of > >> > > > psnic. > >> > > > >> > > man nextboot (if you are using UFS) > >> > > > >> > > -- > >> > > John Baldwin > >> > > > >> > > >> > > >> > > >> > >> > >> > > > -- > Sami Halabi > Information Systems Engineer > NMS Projects Expert > FreeBSD SysAdmin Expert > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"