Date: Thu, 17 Jan 2013 06:35:28 -0700 From: Ian Lepore <ian@FreeBSD.org> To: Sami Halabi <sodynet1@gmail.com> Cc: freebsd-hackers@FreeBSD.org, "freebsd-stable@freebsd.org" <freebsd-stable@FreeBSD.org> Subject: Re: Failsafe on kernel panic Message-ID: <1358429728.32417.193.camel@revolution.hippie.lan> In-Reply-To: <CAEW%2Bogb4Zj6F-usbYyCbw9yHx-DaigT2G07HTXsqT1MvY=K2Eg@mail.gmail.com> References: <CAEW%2BogYvJih5nEpFWPDjfRWxeURQYp=KM=WckmKB_VB=CxEUbQ@mail.gmail.com> <201301161513.27016.jhb@freebsd.org> <CAEW%2BogbQ3WD3ekVZ0GCgsd3UbL1YHzra-=jKEo6-1t11OMYkFg@mail.gmail.com> <1358392725.32417.179.camel@revolution.hippie.lan> <CAEW%2BogaTKTdG=dvZfR1=E3t5v_X98bXTrGWrzp=pNexUa3aYPg@mail.gmail.com> <CAEW%2Bogb4Zj6F-usbYyCbw9yHx-DaigT2G07HTXsqT1MvY=K2Eg@mail.gmail.com>
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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 <sodynet1@gmail.com> wrote: > > > Its only a kernel option? There is no flag to pass to the loader? > > > > SAMI <> 17 2013 05:18, "Ian Lepore" <ian@freebsd.org>: > > > > 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 <jhb@freebsd.org> 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"
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