From: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx> Since we have an unlikely for the "current_order >= pageblock_order / 2" test above, adding an unlikely for this "current_order >= pageblock_order" test seems more appropriate. Signed-off-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx> --- mm/page_alloc.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index c3edb62..1b6d7de 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1071,7 +1071,7 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype) rmv_page_order(page); /* Take ownership for orders >= pageblock_order */ - if (current_order >= pageblock_order && + if (unlikely(current_order >= pageblock_order) && !is_migrate_cma(migratetype)) change_pageblock_range(page, current_order, start_migratetype); -- 1.7.1 -- 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>