On 06/20/2011 08:13 PM, Jan Kiszka wrote:
> A watchdog has the advantage that is also detects lockups. > > In fact you could implement the panic device via the existing > watchdogs. Simply program the timer for the minimum interval and > *don't* service the interrupt. This would work for non-virt setups as > well as another way to issue a reset. If you manage to bring down the other guest CPUs fast enough. Otherwise, they may corrupt your crashdump before the host had a chance to collect all pieces. Synchronous signaling to the hypervisor is a bit safer.
You could NMI-IPI them. But I agree a synchronous signal is better (note it's not race-free itself).
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