Date: Thu, 17 Jan 2013 16:14:21 +0200 From: Sami Halabi <sodynet1@gmail.com> To: Ian Lepore <ian@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Failsafe on kernel panic Message-ID: <CAEW%2BogY_SK-D0eQf-jqX3RSxpXZbVK_OmRUh=Ff2yO%2BjigNT_A@mail.gmail.com> In-Reply-To: <1358429728.32417.193.camel@revolution.hippie.lan> 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> <1358429728.32417.193.camel@revolution.hippie.lan>
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Hi, Upon panic no auto restart occurs. How do I know/activate these watchdogs? Sami =D7=91=D7=AA=D7=90=D7=A8=D7=99=D7=9A 17 =D7=91=D7=99=D7=A0=D7=95 2013 15:35= , =D7=9E=D7=90=D7=AA "Ian Lepore" <ian@freebsd.org>: > 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 sti= ll > > >> 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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