From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx179.postini.com [74.125.245.179]) by kanga.kvack.org (Postfix) with SMTP id 10FBF6B0032 for ; Mon, 9 Sep 2013 15:53:42 -0400 (EDT) Received: from /spool/local by e38.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 9 Sep 2013 13:53:41 -0600 Received: from d03relay01.boulder.ibm.com (d03relay01.boulder.ibm.com [9.17.195.226]) by d03dlp02.boulder.ibm.com (Postfix) with ESMTP id BCF143E40026 for ; Mon, 9 Sep 2013 13:53:38 -0600 (MDT) Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by d03relay01.boulder.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r89JrcXK365454 for ; Mon, 9 Sep 2013 13:53:38 -0600 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r89Jrc02013236 for ; Mon, 9 Sep 2013 13:53:38 -0600 Date: Mon, 9 Sep 2013 14:53:35 -0500 From: Seth Jennings Subject: Re: [RFC PATCH 2/4] mm: use mapcount for identifying zbud pages Message-ID: <20130909195335.GF4701@variantweb.net> References: <1377852176-30970-1-git-send-email-k.kozlowski@samsung.com> <1377852176-30970-3-git-send-email-k.kozlowski@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1377852176-30970-3-git-send-email-k.kozlowski@samsung.com> Sender: owner-linux-mm@kvack.org List-ID: To: Krzysztof Kozlowski Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton , Bob Liu , Mel Gorman , Bartlomiej Zolnierkiewicz , Marek Szyprowski , Kyungmin Park , Dave Hansen , Minchan Kim On Fri, Aug 30, 2013 at 10:42:54AM +0200, Krzysztof Kozlowski wrote: > Currently zbud pages do not have any flags set so it is not possible to > identify them during migration or compaction. > > Implement PageZbud() by comparing page->_mapcount to -127 to distinguish > pages allocated by zbud. Just like PageBuddy() is implemented. > > Signed-off-by: Krzysztof Kozlowski Reviewed-by: Seth Jennings > --- > include/linux/mm.h | 23 +++++++++++++++++++++++ > mm/zbud.c | 4 ++++ > 2 files changed, 27 insertions(+) -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755583Ab3IITxp (ORCPT ); Mon, 9 Sep 2013 15:53:45 -0400 Received: from e31.co.us.ibm.com ([32.97.110.149]:34498 "EHLO e31.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754333Ab3IITxo (ORCPT ); Mon, 9 Sep 2013 15:53:44 -0400 Date: Mon, 9 Sep 2013 14:53:35 -0500 From: Seth Jennings To: Krzysztof Kozlowski Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton , Bob Liu , Mel Gorman , Bartlomiej Zolnierkiewicz , Marek Szyprowski , Kyungmin Park , Dave Hansen , Minchan Kim Subject: Re: [RFC PATCH 2/4] mm: use mapcount for identifying zbud pages Message-ID: <20130909195335.GF4701@variantweb.net> References: <1377852176-30970-1-git-send-email-k.kozlowski@samsung.com> <1377852176-30970-3-git-send-email-k.kozlowski@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1377852176-30970-3-git-send-email-k.kozlowski@samsung.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13090919-8236-0000-0000-0000019952D3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 30, 2013 at 10:42:54AM +0200, Krzysztof Kozlowski wrote: > Currently zbud pages do not have any flags set so it is not possible to > identify them during migration or compaction. > > Implement PageZbud() by comparing page->_mapcount to -127 to distinguish > pages allocated by zbud. Just like PageBuddy() is implemented. > > Signed-off-by: Krzysztof Kozlowski Reviewed-by: Seth Jennings > --- > include/linux/mm.h | 23 +++++++++++++++++++++++ > mm/zbud.c | 4 ++++ > 2 files changed, 27 insertions(+)