From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx193.postini.com [74.125.245.193]) by kanga.kvack.org (Postfix) with SMTP id B24E06B004F for ; Mon, 26 Dec 2011 03:27:43 -0500 (EST) Received: from m2.gw.fujitsu.co.jp (unknown [10.0.50.72]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 091FD3EE0C3 for ; Mon, 26 Dec 2011 17:27:42 +0900 (JST) Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id D9AD545DF57 for ; Mon, 26 Dec 2011 17:27:41 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (s2.gw.fujitsu.co.jp [10.0.50.92]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id C125A45DF55 for ; Mon, 26 Dec 2011 17:27:41 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id AC3291DB803C for ; Mon, 26 Dec 2011 17:27:41 +0900 (JST) Received: from m105.s.css.fujitsu.com (m105.s.css.fujitsu.com [10.240.81.145]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 5C9D91DB8040 for ; Mon, 26 Dec 2011 17:27:41 +0900 (JST) Date: Mon, 26 Dec 2011 17:26:26 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [PATCH 1/4] pagemap: avoid splitting thp when reading /proc/pid/pagemap Message-Id: <20111226172626.49792a03.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <1324506228-18327-2-git-send-email-n-horiguchi@ah.jp.nec.com> References: <1324506228-18327-1-git-send-email-n-horiguchi@ah.jp.nec.com> <1324506228-18327-2-git-send-email-n-horiguchi@ah.jp.nec.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Naoya Horiguchi Cc: linux-mm@kvack.org, Andrew Morton , David Rientjes , Andi Kleen , Wu Fengguang , Andrea Arcangeli , KOSAKI Motohiro , linux-kernel@vger.kernel.org On Wed, 21 Dec 2011 17:23:45 -0500 Naoya Horiguchi wrote: > Thp split is not necessary if we explicitly check whether pmds are > mapping thps or not. This patch introduces the check and the code > to generate pagemap entries for pmds mapping thps, which results in > less performance impact of pagemap on thp. > > Signed-off-by: Naoya Horiguchi > Reviewed-by: Andi Kleen > > Changes since v1: > - move pfn declaration to the beginning of pagemap_pte_range() > --- Reviewed-by: KAMEZAWA Hiroyuki -- 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