diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 36 |
1 files changed, 19 insertions, 17 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 40e29429e7b0..9ca626756927 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1032,11 +1032,9 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order, static int fallbacks[MIGRATE_TYPES][4] = { [MIGRATE_UNMOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE, MIGRATE_RESERVE }, [MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE, MIGRATE_MOVABLE, MIGRATE_RESERVE }, + [MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_RESERVE }, #ifdef CONFIG_CMA - [MIGRATE_MOVABLE] = { MIGRATE_CMA, MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_RESERVE }, [MIGRATE_CMA] = { MIGRATE_RESERVE }, /* Never used */ -#else - [MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_RESERVE }, #endif [MIGRATE_RESERVE] = { MIGRATE_RESERVE }, /* Never used */ #ifdef CONFIG_MEMORY_ISOLATION @@ -1044,6 +1042,17 @@ static int fallbacks[MIGRATE_TYPES][4] = { #endif }; +#ifdef CONFIG_CMA +static struct page *__rmqueue_cma_fallback(struct zone *zone, + unsigned int order) +{ + return __rmqueue_smallest(zone, order, MIGRATE_CMA); +} +#else +static inline struct page *__rmqueue_cma_fallback(struct zone *zone, + unsigned int order) { return NULL; } +#endif + /* * Move the free pages in a range to the free lists of the requested type. * Note that start_page and end_pages are not aligned on a pageblock @@ -1195,19 +1204,8 @@ __rmqueue_fallback(struct zone *zone, unsigned int order, int start_migratetype) struct page, lru); area->nr_free--; - if (!is_migrate_cma(migratetype)) { - try_to_steal_freepages(zone, page, - start_migratetype, - migratetype); - } else { - /* - * When borrowing from MIGRATE_CMA, we need to - * release the excess buddy pages to CMA - * itself, and we do not try to steal extra - * free pages. - */ - buddy_type = migratetype; - } + try_to_steal_freepages(zone, page, start_migratetype, + migratetype); /* Remove the page from the freelists */ list_del(&page->lru); @@ -1249,7 +1247,11 @@ retry_reserve: page = __rmqueue_smallest(zone, order, migratetype); if (unlikely(!page) && migratetype != MIGRATE_RESERVE) { - page = __rmqueue_fallback(zone, order, migratetype); + if (migratetype == MIGRATE_MOVABLE) + page = __rmqueue_cma_fallback(zone, order); + + if (!page) + page = __rmqueue_fallback(zone, order, migratetype); /* * Use MIGRATE_RESERVE rather than fail an allocation. goto |