On Tue, 19 Jul 2016, Xishi Qiu wrote: > Memory offline could happen on both movable zone and non-movable zone, and we > can offline the whole node if the zone is movable_zone(the node only has one > movable_zone), and if the zone is normal_zone, we cannot offline the whole > node, > because some kernel memory can't be migrated. > > So how about change alloc_migrate_target() to alloc memory from the next node > with GFP_HIGHUSER_MOVABLE, if the offline zone is movable_zone. >
I think sharing alloc_migrate_target as a migration callback may not be worth it; CMA and memory offline are distinct usecases and probably deserve their own callbacks.
