From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx139.postini.com [74.125.245.139]) by kanga.kvack.org (Postfix) with SMTP id 432B16B005C for ; Mon, 19 Dec 2011 15:48:06 -0500 (EST) Received: by yhgm50 with SMTP id m50so3077660yhg.14 for ; Mon, 19 Dec 2011 12:48:05 -0800 (PST) Message-ID: <4EEFA308.2090608@gmail.com> Date: Mon, 19 Dec 2011 15:48:08 -0500 From: KOSAKI Motohiro MIME-Version: 1.0 Subject: Re: [RFC][PATCH 2/3] pagemap: export KPF_THP References: <1324319919-31720-1-git-send-email-n-horiguchi@ah.jp.nec.com> <1324319919-31720-3-git-send-email-n-horiguchi@ah.jp.nec.com> <4EEF8F85.9010408@gmail.com> <4EEF9E04.1040007@ah.jp.nec.com> In-Reply-To: <4EEF9E04.1040007@ah.jp.nec.com> Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Naoya Horiguchi Cc: linux-mm@kvack.org, Andi Kleen , Wu Fengguang , Andrea Arcangeli , KOSAKI Motohiro , KAMEZAWA Hiroyuki , linux-kernel@vger.kernel.org >> The detail of transparent hugepage are hidden by design. We hope it >> keep 'transparent'. >> Until any explain why we should expose KPF_THP, we don't agree it. > > The reason why I want to know physical address of thp is testing. > I'm working on memory error recovery and writing test code to confirm > that memory recovery really works when an error occurs on thps. > There I need to locate thps on the physical memory. I'm sorry, I simply don't understand what you say. Why do you think memory recovery and thp are related feature? > > IMO, transparency in thp means that we need no manual setup to use > it (as a contrast with hugetlbfs,) so it seems to me that exporting > pageflag of thp does not break the design of thp. > > Anyway, I should have written the purpose in the patch description. > Thanks for the comment. > > Naoya -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org