On 06/29/2012 01:39 AM, Avi Kivity wrote: > But I still think it's the right thing since it simplifies the code. > Maybe we should add a prefetch() on write_count do mitigate the > overhead, if it starts showing up in profiles. > Long time ago, there was a discussion about dropping prefetch in the operation of list walking: http://lwn.net/Articles/444336/ IIRC, the conclusion is that it is better to let CPU prefetch memory by itself. Actually, when i developed lockless spte walking, i measure the performance if prefetch was used, but i did not see the improvement. -- 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
