From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [PATCH] 2.2.17pre7 VM enhancement Re: I/O performance on 2.4.0-test2 References: <396B8A38.D7FF17B5@norran.net> From: "Juan J. Quintela" In-Reply-To: Roger Larsson's message of "Tue, 11 Jul 2000 22:57:28 +0200" Date: 12 Jul 2000 00:49:40 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linux-mm@kvack.org Return-Path: To: Roger Larsson Cc: "linux-kernel@vger.rutgers.edu" , "linux-mm@kvack.org" List-ID: >>>>> "roger" == Roger Larsson writes: Hi roger> Problem is that you have to age all pages, at some point the newly read roger> pages will be older than the almost never reused ones. The almost never reused pages is ok for them to go to swap, they are good candidates, i.e. candidates to go to swap: 1- unused pages 2- almost unused pages roger> Note: You can not avoid ageing all pages. If not an easy attack would be roger> to reread some pages over and over... (they would never go away...) I wast to age all the pages. That is not an attack, how do you differentiate a program that touches its pages from that. It is ok to do that. Later, Juan. -- In theory, practice and theory are the same, but in practice they are different -- Larry McVoy -- 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.eu.org/Linux-MM/