From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sd0109e.au.ibm.com (d23rh905.au.ibm.com [202.81.18.225]) by e23smtp03.au.ibm.com (8.13.1/8.13.1) with ESMTP id mB24YBsd029415 for ; Tue, 2 Dec 2008 15:34:11 +1100 Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by sd0109e.au.ibm.com (8.13.8/8.13.8/NCO v9.1) with ESMTP id mB24ZZUg310134 for ; Tue, 2 Dec 2008 15:35:35 +1100 Received: from d23av03.au.ibm.com (loopback [127.0.0.1]) by d23av03.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id mB24ZZTw030460 for ; Tue, 2 Dec 2008 15:35:35 +1100 Date: Tue, 2 Dec 2008 10:05:31 +0530 From: Balbir Singh Subject: Re: [mmotm][PATCH 1/4] replacement-for-memcg-simple-migration-handling.patch Message-ID: <20081202043531.GB28197@balbir.in.ibm.com> Reply-To: balbir@linux.vnet.ibm.com References: <20081202131723.806f1724.kamezawa.hiroyu@jp.fujitsu.com> <20081202131840.6d797997.kamezawa.hiroyu@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20081202131840.6d797997.kamezawa.hiroyu@jp.fujitsu.com> Sender: owner-linux-mm@kvack.org Return-Path: To: KAMEZAWA Hiroyuki Cc: "akpm@linux-foundation.org" , "hugh@veritas.com" , "linux-mm@kvack.org" , "nishimura@mxp.nes.nec.co.jp" List-ID: * KAMEZAWA Hiroyuki [2008-12-02 13:18:40]: > From: KAMEZAWA Hiroyuki > > Now, management of "charge" under page migration is done under following > manner. (Assume migrate page contents from oldpage to newpage) > > before > - "newpage" is charged before migration. > at success. > - "oldpage" is uncharged at somewhere(unmap, radix-tree-replace) > at failure > - "newpage" is uncharged. > - "oldpage" is charged if necessary (*1) > > But (*1) is not reliable....because of GFP_ATOMIC. > Kamezawa, You did share page migration test cases with me, but I would really like to see a page migration test scenario or rather a set of test scenarios for the memory controller. Sudhir has added some LTP test cases, but for now I would be satisfied with Documentation updates for testing the various memory controller features (sort of build a regression set of cases in documented form and automate it later). I can start with what I have, I would request you to update the migration cases and any other case you have. -- Balbir -- 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