jmmv 76512a9d94 Synchronize the clock periodically in vmt(4).
Add periodic clock synchronization to vmt(4) so that the guest clock
remains synchronized even when the host is suspended (which is a very
typical situation in a laptop).

Do this by default once per minute, but provide a sysctl to tune this
value (machdep.vmt0.clock_sync.period).

Sent to tech-kern@ for review and addressed a couple of issues.
2013-03-16 01:26:52 +00:00
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