Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753989Ab3FOLHb (ORCPT ); Sat, 15 Jun 2013 07:07:31 -0400 Received: from mail-pb0-f51.google.com ([209.85.160.51]:47058 "EHLO mail-pb0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754088Ab3FOLFr (ORCPT ); Sat, 15 Jun 2013 07:05:47 -0400 Message-ID: <51BC4A83.50302@gmail.com> Date: Sat, 15 Jun 2013 19:05:39 +0800 From: Zhang Yanfei User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120607 Thunderbird/10.0.5 MIME-Version: 1.0 To: Andrew Morton CC: Linux MM , "linux-kernel@vger.kernel.org" Subject: [PATCH] mm: Add unlikely for current_order test Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1132 Lines: 31 From: Zhang Yanfei 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 --- 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/