From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx137.postini.com [74.125.245.137]) by kanga.kvack.org (Postfix) with SMTP id A48E06B004D for ; Tue, 10 Sep 2013 10:48:28 -0400 (EDT) Date: Tue, 10 Sep 2013 15:48:24 +0100 From: Mel Gorman Subject: Re: [PATCH 9/9] prepare to remove /proc/sys/vm/hugepages_treat_as_movable Message-ID: <20130910144823.GS22421@suse.de> References: <1376025702-14818-1-git-send-email-n-horiguchi@ah.jp.nec.com> <1376025702-14818-10-git-send-email-n-horiguchi@ah.jp.nec.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <1376025702-14818-10-git-send-email-n-horiguchi@ah.jp.nec.com> Sender: owner-linux-mm@kvack.org List-ID: To: Naoya Horiguchi Cc: Andrew Morton , linux-mm@kvack.org, Hugh Dickins , KOSAKI Motohiro , Andi Kleen , Hillf Danton , Michal Hocko , Rik van Riel , "Aneesh Kumar K.V" , Wanpeng Li , linux-kernel@vger.kernel.org, Naoya Horiguchi On Fri, Aug 09, 2013 at 01:21:42AM -0400, Naoya Horiguchi wrote: > Now we have extended hugepage migration and it's opened to many users > of page migration, which is a good reason to consider hugepage as movable. > So we can go to the direction to remove this parameter. In order to > allow userspace to prepare for the removal, let's leave this sysctl handler > as noop for a while. > Note that this assumes that users interested in memory hot-remove and hugepages are also willing to resize the hugepage pool on the target nodes before attempting the hot-remove operation. I guess that technically the necessary setup steps could be done from userspace or manually by the system administrator but it may not be obvious to the system administrator that the step is required. -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751647Ab3IJOsa (ORCPT ); Tue, 10 Sep 2013 10:48:30 -0400 Received: from cantor2.suse.de ([195.135.220.15]:47222 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751225Ab3IJOs2 (ORCPT ); Tue, 10 Sep 2013 10:48:28 -0400 Date: Tue, 10 Sep 2013 15:48:24 +0100 From: Mel Gorman To: Naoya Horiguchi Cc: Andrew Morton , linux-mm@kvack.org, Hugh Dickins , KOSAKI Motohiro , Andi Kleen , Hillf Danton , Michal Hocko , Rik van Riel , "Aneesh Kumar K.V" , Wanpeng Li , linux-kernel@vger.kernel.org, Naoya Horiguchi Subject: Re: [PATCH 9/9] prepare to remove /proc/sys/vm/hugepages_treat_as_movable Message-ID: <20130910144823.GS22421@suse.de> References: <1376025702-14818-1-git-send-email-n-horiguchi@ah.jp.nec.com> <1376025702-14818-10-git-send-email-n-horiguchi@ah.jp.nec.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <1376025702-14818-10-git-send-email-n-horiguchi@ah.jp.nec.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 09, 2013 at 01:21:42AM -0400, Naoya Horiguchi wrote: > Now we have extended hugepage migration and it's opened to many users > of page migration, which is a good reason to consider hugepage as movable. > So we can go to the direction to remove this parameter. In order to > allow userspace to prepare for the removal, let's leave this sysctl handler > as noop for a while. > Note that this assumes that users interested in memory hot-remove and hugepages are also willing to resize the hugepage pool on the target nodes before attempting the hot-remove operation. I guess that technically the necessary setup steps could be done from userspace or manually by the system administrator but it may not be obvious to the system administrator that the step is required. -- Mel Gorman SUSE Labs