Jack Cheung f6e34be773
mm: Add total_unmovable_pages global variable ...
Vmalloc will exit if the amount it needs to allocate is
greater than totalram_pages. Vmalloc cannot allocate
from the movable zone, so pages in the movable zone should
not be counted.
This change adds a new global variable: total_unmovable_pages.
It is calculated in init.c, based on totalram_pages minus
the pages in the movable zone. Vmalloc now looks at this new
global instead of totalram_pages.
total_unmovable_pages can be modified during memory_hotplug.
If the zone you are offlining/onlining is unmovable, then
you modify it similar to totalram_pages. If the zone is
movable, then no change is needed.
Change-Id: Ie55c41051e9ad4b921eb04ecbb4798a8bd2344d6
Signed-off-by: Jack Cheung <jackc@codeaurora.org >
(cherry picked from commit 59f9f1c9ae463a3d4499cd9353619f8b1993371b)
Conflicts:
arch/arm/mm/init.c
mm/memory_hotplug.c
mm/page_alloc.c
mm/vmalloc.c
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