Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932711AbVKBOOi (ORCPT ); Wed, 2 Nov 2005 09:14:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932712AbVKBOOi (ORCPT ); Wed, 2 Nov 2005 09:14:38 -0500 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:39141 "EHLO fgwmail6.fujitsu.co.jp") by vger.kernel.org with ESMTP id S932711AbVKBOOh (ORCPT ); Wed, 2 Nov 2005 09:14:37 -0500 Message-ID: <4368C926.2040102@jp.fujitsu.com> Date: Wed, 02 Nov 2005 23:11:50 +0900 From: Kamezawa Hiroyuki User-Agent: Mozilla Thunderbird 1.0.6 (Windows/20050716) X-Accept-Language: ja, en-us, en MIME-Version: 1.0 To: clameter@engr.sgi.com CC: Hirokazu Takahashi , rob@landley.net, akpm@osdl.org, torvalds@osdl.org, kravetz@us.ibm.com, raybry@mpdtxmail.amd.com, linux-kernel@vger.kernel.org, lee.schermerhorn@hp.com, haveblue@us.ibm.com, magnus.damm@gmail.com, pj@sgi.com, marcelo.tosatti@cyclades.com Subject: Re: [PATCH 0/5] Swap Migration V5: Overview References: <20051102.143047.35521963.taka@valinux.co.jp> <20051102.212651.25143264.taka@valinux.co.jp> In-Reply-To: <20051102.212651.25143264.taka@valinux.co.jp> 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: 1279 Lines: 36 Hirokazu Takahashi wrote: > Hi Christoph, > I've read the archive of lhms-devel. > You're going to take in most of the original migration code > except for some tricks to migrate pages which are hard to move. > I think this is what you said the complexity, which you > want to remove forever. > > I have to explain that this complexity came from making the code > guarantee to be able to migrate any pages. So the code is designed: > - to migrate heavily accessed pages. > - to migrate pages without backing-store. > - to migrate pages without I/O's. > - to migrate pages of which status may be changed during the migration > correctly. > > This have to be implemented if the hotplug memory use it. yes. > It seems to become a reinvention of the wheel to me. > Christoph, I think you should make it clear the advantage of your code to the -mhp tree's. I think we can add migrate_page_to() easily to the -mhp tree's as Takahashi said. BTW, could you explain what is done and what is not in your patch set ? -- 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/