On Mon, Jul 04, 2016 at 04:30:08PM -0300, Marcelo Tosatti wrote: > On Mon, Jul 04, 2016 at 01:01:42PM +0200, Paolo Bonzini wrote: > > Can bad things happen if a guest using the TSC deadline timer is > > migrated? The guest doesn't re-calibrate the TSC after migration, and > > the TSC frequency can and will change unless your data center is > > perfectly homogeneous. > > It can fire earlier if the destination runs at a higher frequency. > It will fire past the configured time if the destination runs at a slower frequency. > > Suppose the first case is worse. > > Should convert the expiration time to nanoseconds i suppose, and then > convert back on the destination. This won't make any difference if the guest sets up a new timer after migration (but using the old TSC frequency), will it? -- Eduardo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
