> I would expect a processor to fetch the zero page cachelines from the l3 > cache from other sockets avoiding memory transactions altogether. The zero > page is likely in use somewhere so no typically no memory accesses should > occur in a system. It depends on how effectively the workload uses the caches. If something is a cache pig of the L3 cache, then even shareable cache lines may need to be refetched regularly. But if your workloads spends a significant part of its time reading from zero page read only data there is something wrong with the workload. I would do some data profiling first to really prove that is the case. -Andi -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>