Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755345AbYAOJEp (ORCPT ); Tue, 15 Jan 2008 04:04:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752248AbYAOJEc (ORCPT ); Tue, 15 Jan 2008 04:04:32 -0500 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:43627 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752064AbYAOJEb (ORCPT ); Tue, 15 Jan 2008 04:04:31 -0500 Date: Tue, 15 Jan 2008 18:03:38 +0900 From: KOSAKI Motohiro To: Peter Zijlstra Subject: Re: [RFC] mmaped copy too slow? Cc: kosaki.motohiro@jp.fujitsu.com, Rik van Riel , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton In-Reply-To: <1200387478.15103.21.camel@twins> References: <20080115115318.1191.KOSAKI.MOTOHIRO@jp.fujitsu.com> <1200387478.15103.21.camel@twins> Message-Id: <20080115180130.119A.KOSAKI.MOTOHIRO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.42 [ja] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 847 Lines: 27 Hi Peter, > > > While being able to deal with used-once mappings in page reclaim > > > could be a good idea, this would require us to be able to determine > > > the difference between a page that was accessed once since it was > > > faulted in and a page that got accessed several times. > > > > it makes sense that read ahead hit assume used-once mapping, may be. > > I will try it. > > I once had a patch that made read-ahead give feedback into page reclaim, > but people didn't like it. Could you please tell me your mail subject or URL? I hope know why people didn't like. thanks - kosaki -- 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/