Avi Kivity wrote: > The kvm mmu synchronizes shadow ptes using the mmu lock, however the cpu > will happily ignore the lock when setting the accessed bit. This can cause > the accessed bit to be lost. Luckily this only results in incorrect page > selection for swap. > Atomic operation is heavy and slow, it hurts performance. Incorrect page selection for swap also hurts performance. I think there are very rare competitions happened and cause the accessed bit to be lost. Since there is no incorrect result when the accessed bit is lost. Is this problem over concern? Lai -- 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
