From: Wei Yang Date: Fri, 7 Aug 2020 06:25:58 +0000 (-0700) Subject: mm/page_alloc: fallbacks at most has 3 elements X-Git-Tag: microblaze-v5.10~98^2~10 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=da4156639985a9cdba9727d7f39b69a6b4268dad;p=linux-2.6-microblaze.git 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 Signed-off-by: Andrew Morton Reviewed-by: David Hildenbrand Link: http://lkml.kernel.org/r/20200625231022.18784-1-richard.weiyang@linux.alibaba.com Signed-off-by: Linus Torvalds --- diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 9a39009b1562..2e49b184233c 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -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 },