> So if a guest exits due to an external event it's easy to inspect the > state of that guest and avoid to schedule away when it was interrupted > in a spinlock held section. That guest/host shared state needs to be On a large system under high contention sleeping can perform surprisingly well. pthread mutexes have a tendency to beat kernel spinlocks there. So avoiding sleeping locks completely (that is what pv locks are essentially) is not necessarily that good. Your proposal is probably only a good idea on low contention and relatively small systems. -Andi -- ak@xxxxxxxxxxxxxxx -- Speaking for myself only. -- 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
