From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 15 Jan 2008 18:03:38 +0900 From: KOSAKI Motohiro Subject: Re: [RFC] mmaped copy too slow? 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 Sender: owner-linux-mm@kvack.org Return-Path: To: Peter Zijlstra Cc: kosaki.motohiro@jp.fujitsu.com, Rik van Riel , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton List-ID: 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, 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