Remove unlikely(order), because we are sure order is not zero if code reach here, also add if (page == NULL), only allocate page again if __rmqueue_smallest() failed or alloc_flags & ALLOC_HARDER == 0 Signed-off-by: yalin wang <yalin.wang2010@xxxxxxxxx> --- mm/page_alloc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 0d6f540..de82e2c 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2241,13 +2241,13 @@ struct page *buffered_rmqueue(struct zone *preferred_zone, spin_lock_irqsave(&zone->lock, flags); page = NULL; - if (unlikely(order) && (alloc_flags & ALLOC_HARDER)) { + if (alloc_flags & ALLOC_HARDER) { page = __rmqueue_smallest(zone, order, MIGRATE_HIGHATOMIC); if (page) trace_mm_page_alloc_zone_locked(page, order, migratetype); } - - page = __rmqueue(zone, order, migratetype, gfp_flags); + if (page == NULL) + page = __rmqueue(zone, order, migratetype, gfp_flags); spin_unlock(&zone->lock); if (!page) goto failed; -- 1.9.1 -- 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>