Re: How to compile kernel so it automatically reboots upon a crash instead of generating stack trace and then hang.

thanks everyone for the information.

can it be presumed that boot option panic=<x> would always reboot the machine
upon a crash/null pointer dereference if it is not stuck in a
deadlock? also, is there any
place in kernel where, if desired, the panic time can be hardcoded and compiled
for my specific test kernel.

intention is to look for a way to make a regular PC with linux OS
behave close to a
customized hardware appliance through software only mechanism. that
way it becomes
much easier to send just software to the users, which they can load on any
PC without requiring them to have additional hardware inserted into it.

please CC me on replies.

thanks
PK

On Wed, Mar 12, 2008 at 5:40 AM, Bart Van Assche
<bart.vanassche@xxxxxxxxx> wrote:
On Wed, Mar 12, 2008 at 6:04 AM, Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx> wrote:

On Mar 11 2008 23:52, Prakhar Krishna wrote:
>
>[I did search the mailing lists archives and the Web but did not find an answer,
> apololgies if this is duplicate question]
>
>i need my linux box to automatically reboot if it ever runs into a
>kernel panic/crash etc.

panic=<timeout> boot parameter, as per
Documentation/kernel-parameters.txt.

The best solution in this case is a hardware watchdog. Hardware
watchdogs are present on some server motherboards, most embedded x86
CPU boards and also in PowerPC CPU's. The Linux kernel supports some
hardware watchdogs, see also Device Drivers/Watchdog Timer Support in
the Linux kernel config.

The nmi_watchdog=<timeout> parameter might be interesting too. See
also Documentation/nmi_watchdog.txt.

Bart.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Relevant Pages

  • Re: SBS Server crash Unexpected - Error ID 6008
    ... If so, start in Safe Mode, delete all page files and reboot, then recreate your pagefile and reboot one more time ... Hard ware vendor has check hardware log, Raid Controller Log, but no hardware ... Loading Kernel Symbols ... in paging file or disk controller error. ...
    (microsoft.public.windows.server.sbs)
  • Re: How to reboot the computer on the driver???
    ... You will be using documented calls, the kernel only ... I guess I'm trying to understand how a user can use the hardware ... Windows 2k/XP/2k3 Filesystem and Driver Consulting ... > that is any possible to reboot the computer in the driver???? ...
    (microsoft.public.development.device.drivers)
  • Re: spontaneous reboots with latest 2.6.16 RC-s
    ... Could be kernel or X or hardware, ... This reboot is not reproducible at will, ... E.g. "24 hours of mplayer fullscreen"? ...
    (Linux-Kernel)
  • Re: Diagnosing occassional random reboots
    ... reboot. ... the symptoms do sound like hardware. ... I think hardware is far more likely to be a the problem than the kernel version. ... To UNSUBSCRIBE, email to debian-user-REQUEST@xxxxxxxxxxxxxxxx with a subject of "unsubscribe". ...
    (Debian-User)
  • Re: linux kernel without users
    ... system within the linux kernel, taking ideas from Coyotos (and little ... Then you might as well start wondering if you really need an operating system. ... lay it right on the hardware. ...
    (comp.os.linux.misc)