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Commit 422c5709 authored by Vinayak Menon's avatar Vinayak Menon Committed by Swathi Sridhar
Browse files

mm: make cma the first choice for movable request 



cma entertains only movable requests, so it is better to fill up
the cma regions first so that MIGRATE_MOVABLE regions remain
available to satisfy a steal by unmovable requests, thus
improving the chances of unmovable allocation successes during
low memory situtations.

Change-Id: I01904b86feb5307c17c17072ca9360cf0c17b408
Signed-off-by: default avatarVinayak Menon <vinmenon@codeaurora.org>
parent f1571343

mm/page_alloc.c

+5 −5
Original line number Diff line number Diff line
@@ -2450,14 +2450,14 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype) 
static __always_inline struct page *

__rmqueue(struct zone *zone, unsigned int order, int migratetype)

{

	struct page *page;

	struct page *page = NULL;



retry:

	page = __rmqueue_smallest(zone, order, migratetype);

	if (unlikely(!page)) {

	if (migratetype == MIGRATE_MOVABLE)

		page = __rmqueue_cma_fallback(zone, order);



	if (!page) {

		page = __rmqueue_smallest(zone, order, migratetype);

		if (!page && __rmqueue_fallback(zone, order, migratetype))

			goto retry;

	}