[RFC] memory hotremove patch take 2 [09/10] (direct isolation for remove)

This patch is to isolate source page of migration ASAP in unmap_and_move(), when memory-hotremove. In old code, it uses just put_page(), and we expected that migrated source page is catched in __free_one_page() as isolated page. But, it is spooled in per_cpu_page and used soon for next

[RFC] memory hotremove patch take 2 [09/10] (direct isolation for remove)

This patch is to isolate source page of migration ASAP in unmap_and_move(), when memory-hotremove. In old code, it uses just put_page(), and we expected that migrated source page is catched in __free_one_page() as isolated page. But, it is spooled in per_cpu_page and used soon for next