On Wed, Jul 09, 2014 at 09:13:07AM +0100, Mel Gorman wrote: > The purpose of numa_zonelist_order=zone is to preserve lower zones > for use with 32-bit devices. If locality is preferred then the > numa_zonelist_order=node policy should be used. Unfortunately, the fair > zone allocation policy overrides this by skipping zones on remote nodes > until the lower one is found. While this makes sense from a page aging > and performance perspective, it breaks the expected zonelist policy. This > patch restores the expected behaviour for zone-list ordering. > > Signed-off-by: Mel Gorman <mgorman@xxxxxxx> 32-bit NUMA? :-) Anyway, this change also cuts down the fair pass overhead on bigger NUMA machines, so I'm all for it. Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> -- 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>