On Fri, 22 Jul 2016 10:57:48 +0800 Xishi Qiu <qiuxishi@xxxxxxxxxx> wrote: > Memory offline could happen on both movable zone and non-movable zone. > We can offline the whole node if the zone is movable zone, and if the > zone is non-movable zone, we cannot offline the whole node, because > some kernel memory can't be migrated. > > So if we offline a node with movable zone, use prefer mempolicy to alloc > new page from the next node instead of the current node or other remote > nodes, because re-migrate is a waste of time and the distance of the > remote nodes is often very large. > > Also use GFP_HIGHUSER_MOVABLE to alloc new page if the zone is movable > zone. This conflicts pretty significantly with your "mem-hotplug: use different mempolicy in alloc_migrate_target()". Does it replace "mem-hotplug: use different mempolicy in alloc_migrate_target()" and your "mem-hotplug: use GFP_HIGHUSER_MOVABLE in, alloc_migrate_target()", or what? -- 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>