Messages in this thread | | | Date | Tue, 19 Jul 2016 12:05:13 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [PATCH 1/2] mem-hotplug: use GFP_HIGHUSER_MOVABLE in, alloc_migrate_target() |
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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.
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