On Wed, Dec 02, 2020 at 04:42:32PM +0800, Huang Ying wrote: > Now, NUMA balancing can only optimize the page placement among the > NUMA nodes if the default memory policy is used. Because the memory > policy specified explicitly should take precedence. But this seems > too strict in some situations. For example, on a system with 4 NUMA > nodes, if the memory of an application is bound to the node 0 and 1, > NUMA balancing can potentially migrate the pages between the node 0 > and 1 to reduce cross-node accessing without breaking the explicit > memory binding policy. > Ok, I think this part is ok and while the test case is somewhat superficial, it at least demonstrated that the NUMA balancing overhead did not offset any potential benefit Acked-by: Mel Gorman <mgorman@xxxxxxx> -- Mel Gorman SUSE Labs
