On 10/08/2009 06:34 PM, Gleb Natapov wrote:
So suppose I have simple watchdog device that required to be poked every second, otherwise it resets a computer. On migration we have to migrate time elapsed since last poke, but if device doesn't expose it to software in any way you are saying we can recreate is some other way?
The time is exposed (you can measure it by poking the device and measuring the time till reset) and will be described in the spec (otherwise users will be surprised when their machine resets).
You don't have to migrate all exposed state, just exposed state that the guest may rely on.
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