Re: watchdog?

["Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost>]

On Mon, Jun 17, 2013 at 10:28:43AM +0900, Masao Uebayashi wrote:
> What do people do to detect hard hang-up and forcibly reboot the system?
> 
> My understanding is that x86 has no standard way to do this, right?
> 
> I'm considering to implement something similar to Linux's "NMI
> watchdog", but before doing that, I want to make sure I'm in the right
> direction ...

There is an ACPI spec (or two) for watchdog hardware, but AFAIK they are
not widely implemented.

LAPIC-counter-triggered NMI is going to be a lot easier to come by.
Also, NMI can get you into ddb, if you want.