RE: [Xen-users] Watchdog support in XEN?

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> Many physical PCs have a hardware watchdog. This is a good 
> way of getting up and running again if you somehow have a bug 
> that causes a deadlock.
> If you run linux in DomU you will have to use a software 
> watchdog. The kernel provides such a software watchdog. But 
> could there be scenarios where the DomU domain will lockup 
> without the software watchdog goes off?
> Interrupts?
> 
> So my question does XEN provide a "hardware" watchdog that 
> the user domains can use?
> It might be safer that the counter and trigger resides in the 
> XEN domain than in the user domains.

It doesn't today, but could easily be added. A better approach might be
to do some more sophisticated higher-level liveness monitoring in
domain0, then use the tools to reboot the domain.

Ian

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