Commit da415663 authored Aug 06, 2020 by Wei Yang Committed by Linus Torvalds Aug 07, 2020

mm/page_alloc: fallbacks at most has 3 elements



MIGRAGE_TYPES is used to be the mark of end and there are at most 3
elements for the one dimension array.

Reduce to 3 to save little memory.

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: http://lkml.kernel.org/r/20200625231022.18784-1-richard.weiyang@linux.alibaba.com


Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 9e15afa5

mm/page_alloc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2268,7 +2268,7 @@ struct page __rmqueue_smallest(struct zone zone, unsigned int order,
		* This array describes the order lists are fallen back to when
		* the free lists for the desirable migrate type are depleted
		*/
		static int fallbacks[MIGRATE_TYPES][4] = {
		static int fallbacks[MIGRATE_TYPES][3] = {
		[MIGRATE_UNMOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE, MIGRATE_TYPES },
		[MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_TYPES },
		[MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE, MIGRATE_MOVABLE, MIGRATE_TYPES },

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