Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964851AbVJUDWh (ORCPT ); Thu, 20 Oct 2005 23:22:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964852AbVJUDWh (ORCPT ); Thu, 20 Oct 2005 23:22:37 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:45715 "EHLO fgwmail5.fujitsu.co.jp") by vger.kernel.org with ESMTP id S964851AbVJUDWg (ORCPT ); Thu, 20 Oct 2005 23:22:36 -0400 Message-ID: <43585EDE.3090704@jp.fujitsu.com> Date: Fri, 21 Oct 2005 12:22:06 +0900 From: KAMEZAWA Hiroyuki User-Agent: Mozilla Thunderbird 1.0.7 (Windows/20050923) X-Accept-Language: ja, en-us, en MIME-Version: 1.0 To: mike kravetz CC: Andrew Morton , Christoph Lameter , linux-kernel@vger.kernel.org, linux-mm@kvack.org, magnus.damm@gmail.com, marcelo.tosatti@cyclades.com Subject: Re: [PATCH 0/4] Swap migration V3: Overview References: <20051020225935.19761.57434.sendpatchset@schroedinger.engr.sgi.com> <20051020160638.58b4d08d.akpm@osdl.org> <20051020234621.GL5490@w-mikek2.ibm.com> In-Reply-To: <20051020234621.GL5490@w-mikek2.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1183 Lines: 29 mike kravetz wrote: > On Thu, Oct 20, 2005 at 04:06:38PM -0700, Andrew Morton wrote: > Just to be clear, there are at least two distinct requirements for hotplug. > One only wants to remove a quantity of memory (location unimportant). The > other wants to remove a specific section of memory (location specific). I > think the first is easier to address. > The only difficulty to remove a quantity of memory is how to find where is easy to be removed. If this is fixed, I think it is easier to address. My own target is NUMA-node-hotplug. I want to make the possibility of hotplug *remove a specific section* be close to 100%. Considering NUMA node hotplug, if a process is memory location sensitve, it should be migrated before node is removed. So, process migration by hand before system's memory hotplug looks attractive to me. If we can implement memory migration before memory hotplug in good way, I think it's good. -- Kame - 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/