From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f49.google.com (mail-wm0-f49.google.com [74.125.82.49]) by kanga.kvack.org (Postfix) with ESMTP id 1D7696B0005 for ; Mon, 21 Mar 2016 07:37:27 -0400 (EDT) Received: by mail-wm0-f49.google.com with SMTP id p65so118078212wmp.0 for ; Mon, 21 Mar 2016 04:37:27 -0700 (PDT) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id v80si4946454wmv.40.2016.03.21.04.37.25 for (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 21 Mar 2016 04:37:25 -0700 (PDT) Date: Mon, 21 Mar 2016 11:37:19 +0000 From: Mel Gorman Subject: Re: [PATCH 1/6] mm/page_alloc: fix same zone check in __pageblock_pfn_to_page() Message-ID: <20160321113719.GM28876@suse.de> References: <1457940697-2278-1-git-send-email-iamjoonsoo.kim@lge.com> <1457940697-2278-2-git-send-email-iamjoonsoo.kim@lge.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <1457940697-2278-2-git-send-email-iamjoonsoo.kim@lge.com> Sender: owner-linux-mm@kvack.org List-ID: To: js1304@gmail.com Cc: Andrew Morton , Rik van Riel , Johannes Weiner , 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 On Mon, Mar 14, 2016 at 04:31:32PM +0900, js1304@gmail.com wrote: > 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. > > In __pageblock_pfn_to_page(), there is a check for this but it's > not sufficient. This check cannot distinguish the case that zone id > is the same but node id is different. This patch fixes it. > I think you may be mixing up page_zone_id with page_zonenum. -- Mel Gorman SUSE Labs -- 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