diff options
| author | Yajun Deng <yajun.deng@linux.dev> | 2023-02-03 18:01:32 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-09 16:51:41 -0800 |
| commit | aa02d3c174abfc506058d3e43f471bc4280563d0 (patch) | |
| tree | 10d3ee81e4eafc4ba2110588b0994587c029b06f /mm/page_alloc.c | |
| parent | 601c3c29dbeb049862faa00917f2daf094a71028 (diff) | |
mm/page_alloc: reduce fallbacks to (MIGRATE_PCPTYPES - 1)
The commit 1dd214b8f21c ("mm: page_alloc: avoid merging non-fallbackable
pageblocks with others") has removed MIGRATE_CMA and MIGRATE_ISOLATE from
fallbacks list. so there is no need to add an element at the end of every
type.
Reduce fallbacks to (MIGRATE_PCPTYPES - 1).
Link: https://lkml.kernel.org/r/20230203100132.1627787-1-yajun.deng@linux.dev
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: David Hildenbrand <david@redhat.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Mike Rapoport <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 5ebce58026f1..21d820c42900 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2603,10 +2603,10 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order, * * The other migratetypes do not have fallbacks. */ -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 }, +static int fallbacks[MIGRATE_TYPES][MIGRATE_PCPTYPES - 1] = { + [MIGRATE_UNMOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE }, + [MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE }, + [MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE, MIGRATE_MOVABLE }, }; #ifdef CONFIG_CMA @@ -2865,11 +2865,8 @@ int find_suitable_fallback(struct free_area *area, unsigned int order, return -1; *can_steal = false; - for (i = 0;; i++) { + for (i = 0; i < MIGRATE_PCPTYPES - 1 ; i++) { fallback_mt = fallbacks[migratetype][i]; - if (fallback_mt == MIGRATE_TYPES) - break; - if (free_area_empty(area, fallback_mt)) continue; |