On Tue, Jul 05, 2016 at 11:40:22PM +0200, Paolo Bonzini wrote: > > > On 05/07/2016 20:11, Eduardo Habkost wrote: > > In this case, if TSC scaling is not supported, is it preferable > > to have the TSC frequency suddenly changing without the guest > > being aware of it, or to run in tsc_always_catchup mode? QEMU 2.5 > > did the former, QEMU 2.6 does the latter. > > I suspect the former is better just because we don't know the exact > effect of tsc_always_catchup. Forget what I said. QEMU 2.6 checks for KVM_CAP_TSC_CONTROL before calling KVM_SET_TSC_KHZ. In this case, it will never trigger tsc_always_catchup, right? -- 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
