Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755521AbaGDHyk (ORCPT ); Fri, 4 Jul 2014 03:54:40 -0400 Received: from lgeamrelo01.lge.com ([156.147.1.125]:43431 "EHLO lgeamrelo01.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755286AbaGDHxC (ORCPT ); Fri, 4 Jul 2014 03:53:02 -0400 X-Original-SENDERIP: 10.177.220.145 X-Original-MAILFROM: iamjoonsoo.kim@lge.com From: Joonsoo Kim To: Andrew Morton Cc: "Kirill A. Shutemov" , Rik van Riel , Peter Zijlstra , Mel Gorman , Johannes Weiner , Minchan Kim , Yasuaki Ishimatsu , Zhang Yanfei , "Srivatsa S. Bhat" , Tang Chen , Naoya Horiguchi , Bartlomiej Zolnierkiewicz , Wen Congyang , Marek Szyprowski , Michal Nazarewicz , Laura Abbott , Heesub Shin , "Aneesh Kumar K.V" , Ritesh Harjani , t.stanislaws@samsung.com, Gioh Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Joonsoo Kim Subject: [PATCH 08/10] mm/page_alloc: use get_onbuddy_migratetype() to get buddy list type Date: Fri, 4 Jul 2014 16:57:53 +0900 Message-Id: <1404460675-24456-9-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1404460675-24456-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1404460675-24456-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When isolating free page, what we want to know is which list the page is linked. If it is linked in isolate migratetype buddy list, we can skip watermark check and freepage counting. And if it is linked in CMA migratetype buddy list, we need to fixup freepage counting. For this purpose, get_onbuddy_migratetype() is more fit and cheap than get_pageblock_migratetype(). So use it. Signed-off-by: Joonsoo Kim --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e1c4c3e..d9fb8bb 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1597,7 +1597,7 @@ static int __isolate_free_page(struct page *page, unsigned int order) BUG_ON(!PageBuddy(page)); zone = page_zone(page); - mt = get_pageblock_migratetype(page); + mt = get_onbuddy_migratetype(page); if (!is_migrate_isolate(mt)) { /* Obey watermarks as if the page was being allocated */ -- 1.7.9.5 -- 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/