From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f41.google.com (mail-pa0-f41.google.com [209.85.220.41]) by kanga.kvack.org (Postfix) with ESMTP id 1A6116B0257 for ; Mon, 14 Mar 2016 03:32:11 -0400 (EDT) Received: by mail-pa0-f41.google.com with SMTP id tt10so151738058pab.3 for ; Mon, 14 Mar 2016 00:32:11 -0700 (PDT) Received: from mail-pa0-x243.google.com (mail-pa0-x243.google.com. [2607:f8b0:400e:c03::243]) by mx.google.com with ESMTPS id a5si1462915pat.63.2016.03.14.00.32.10 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 14 Mar 2016 00:32:10 -0700 (PDT) Received: by mail-pa0-x243.google.com with SMTP id q6so14031985pav.0 for ; Mon, 14 Mar 2016 00:32:10 -0700 (PDT) From: js1304@gmail.com Subject: [PATCH 5/6] mm/page_owner: add zone range overlapping check Date: Mon, 14 Mar 2016 16:31:36 +0900 Message-Id: <1457940697-2278-6-git-send-email-iamjoonsoo.kim@lge.com> In-Reply-To: <1457940697-2278-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1457940697-2278-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Rik van Riel , Johannes Weiner , Mel Gorman , Laura Abbott , Minchan Kim , Marek Szyprowski , Michal Nazarewicz , "Aneesh Kumar K.V" , Vlastimil Babka , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Rafael J. Wysocki" , Joonsoo Kim From: Joonsoo Kim There is a system that node's pfn are overlapped like as following. -----pfn--------> N0 N1 N2 N0 N1 N2 Therefore, we need to care this overlapping when iterating pfn range. There are one place in page_owner.c that iterates pfn range and it doesn't consider this overlapping. Add it. Without this patch, above system could over count early allocated page number before page_owner is activated. Signed-off-by: Joonsoo Kim --- mm/page_owner.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/page_owner.c b/mm/page_owner.c index ac3d8d1..438768c 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -301,6 +301,9 @@ static void init_pages_in_zone(pg_data_t *pgdat, struct zone *zone) page = pfn_to_page(pfn); + if (page_zone(page) != zone) + continue; + /* * We are safe to check buddy flag and order, because * this is init stage and only single thread runs. -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org