On 11/12/2014 09:07, zhanghailiang wrote: > User space (i.e. QEMU) should be able to check whether KVM > supports apic-v. User space will use this to decide whether enable > emulated MSR-based APIC (i.e. hyperv-vapic). Did you see an improvement in some workload? I think it's a Windows bug---it should prefer x2apic to hv-vapic if both are available. Paolo -- 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