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Commitda41566

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weiyang-linuxtorvalds
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mm/page_alloc: fallbacks at most has 3 elements
MIGRAGE_TYPES is used to be the mark of end and there are at most 3elements 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.comSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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‎mm/page_alloc.c‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2268,7 +2268,7 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order,
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* This array describes the order lists are fallen back to when
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* the free lists for the desirable migrate type are depleted
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*/
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staticintfallbacks[MIGRATE_TYPES][4]= {
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staticintfallbacks[MIGRATE_TYPES][3]= {
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[MIGRATE_UNMOVABLE]= {MIGRATE_RECLAIMABLE,MIGRATE_MOVABLE,MIGRATE_TYPES },
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[MIGRATE_MOVABLE]= {MIGRATE_RECLAIMABLE,MIGRATE_UNMOVABLE,MIGRATE_TYPES },
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[MIGRATE_RECLAIMABLE]= {MIGRATE_UNMOVABLE,MIGRATE_MOVABLE,MIGRATE_TYPES },

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