Introduce two helpers, is_migrate_highatomic() and is_migrate_highatomic_page(). Simplify the code, no functional changes. Signed-off-by: Xishi Qiu <qiuxishi@xxxxxxxxxx> --- include/linux/mmzone.h | 5 +++++ mm/page_alloc.c | 14 ++++++-------- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 8e02b37..8124440 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -66,6 +66,11 @@ enum { /* In mm/page_alloc.c; keep in sync also with show_migration_types() there */ extern char * const migratetype_names[MIGRATE_TYPES]; +#define is_migrate_highatomic(migratetype) \ + (migratetype == MIGRATE_HIGHATOMIC) +#define is_migrate_highatomic_page(_page) \ + (get_pageblock_migratetype(_page) == MIGRATE_HIGHATOMIC) + #ifdef CONFIG_CMA # define is_migrate_cma(migratetype) unlikely((migratetype) == MIGRATE_CMA) # define is_migrate_cma_page(_page) (get_pageblock_migratetype(_page) == MIGRATE_CMA) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 9f9623d..40d79a6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2040,8 +2040,8 @@ static void reserve_highatomic_pageblock(struct page *page, struct zone *zone, /* Yoink! */ mt = get_pageblock_migratetype(page); - if (mt != MIGRATE_HIGHATOMIC && - !is_migrate_isolate(mt) && !is_migrate_cma(mt)) { + if (!is_migrate_highatomic(mt) && !is_migrate_isolate(mt) + && !is_migrate_cma(mt)) { zone->nr_reserved_highatomic += pageblock_nr_pages; set_pageblock_migratetype(page, MIGRATE_HIGHATOMIC); move_freepages_block(zone, page, MIGRATE_HIGHATOMIC); @@ -2098,8 +2098,7 @@ static bool unreserve_highatomic_pageblock(const struct alloc_context *ac, * from highatomic to ac->migratetype. So we should * adjust the count once. */ - if (get_pageblock_migratetype(page) == - MIGRATE_HIGHATOMIC) { + if (is_migrate_highatomic_page(page)) { /* * It should never happen but changes to * locking could inadvertently allow a per-cpu @@ -2156,8 +2155,7 @@ static bool unreserve_highatomic_pageblock(const struct alloc_context *ac, page = list_first_entry(&area->free_list[fallback_mt], struct page, lru); - if (can_steal && - get_pageblock_migratetype(page) != MIGRATE_HIGHATOMIC) + if (can_steal && !is_migrate_highatomic_page(page)) steal_suitable_fallback(zone, page, start_migratetype); /* Remove the page from the freelists */ @@ -2494,7 +2492,7 @@ void free_hot_cold_page(struct page *page, bool cold) /* * We only track unmovable, reclaimable and movable on pcp lists. * Free ISOLATE pages back to the allocator because they are being - * offlined but treat RESERVE as movable pages so we can get those + * offlined but treat HIGHATOMIC as movable pages so we can get those * areas back if necessary. Otherwise, we may have to free * excessively into the page allocator */ @@ -2605,7 +2603,7 @@ int __isolate_free_page(struct page *page, unsigned int order) for (; page < endpage; page += pageblock_nr_pages) { int mt = get_pageblock_migratetype(page); if (!is_migrate_isolate(mt) && !is_migrate_cma(mt) - && mt != MIGRATE_HIGHATOMIC) + && !is_migrate_highatomic(mt)) set_pageblock_migratetype(page, MIGRATE_MOVABLE); } -- 1.8.3.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>