From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 29 Jul 2002 05:04:23 -0300 (BRT) From: Rik van Riel Subject: Re: [RFC] start_aggressive_readahead In-Reply-To: <3D44F01A.C7AAA1B4@zip.com.au> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: Scott Kaplan , Christoph Hellwig , linux-mm@kvack.org List-ID: On Mon, 29 Jul 2002, Andrew Morton wrote: > > Similarly, you would want to be very > > cautious about increasing the size of the read-ahead window of many pages > > at the end of the inactive list are being re-used. > > I tend to think that if pages at the tail of the LRU are being > referenced with any frequency we've goofed anyway. There are > many things apart from readahead which will allocate pages, yes? It would be a useful thing to measure, though. We can use this information to decide to: 1) reduce readahead and, if if the situation continues 2) do load control regards, Rik -- Bravely reimplemented by the knights who say "NIH". http://www.surriel.com/ http://distro.conectiva.com/ -- 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/