From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765356AbXGUVHW (ORCPT ); Sat, 21 Jul 2007 17:07:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755291AbXGUVHL (ORCPT ); Sat, 21 Jul 2007 17:07:11 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:33225 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755159AbXGUVHJ (ORCPT ); Sat, 21 Jul 2007 17:07:09 -0400 Subject: Re: [PATCH 1/3] readahead: drop behind From: Peter Zijlstra To: Eric St-Laurent Cc: linux-kernel , Fengguang Wu , riel , Andrew Morton , Rusty Russell , Tim Pepper , Chris Snook In-Reply-To: <1185051551.28982.4.camel@perkele> References: <20070721210005.000228000@chello.nl> <20070721210051.975382000@chello.nl> <1185049747.27915.8.camel@perkele> <1185050276.5652.23.camel@lappy> <1185051551.28982.4.camel@perkele> Content-Type: text/plain Date: Sat, 21 Jul 2007 23:06:39 +0200 Message-Id: <1185051999.5652.25.camel@lappy> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2007-07-21 at 16:59 -0400, Eric St-Laurent wrote: > > They are against git of a few hours ago and the latest readahead patches > > from Wu (which don't apply cleanly either, but the rejects are trivial). > > > > > It would be useful to have a temporary /proc tunable to enable/disable > > > the heuristic to help test the effects. > > > > Right, I had such a patch somewhere,.. won't apply cleanly but should be > > obvious.. > > Thanks, I will merge theses and report back with some results. > > After copying large files, I find my system sluggish. I hope your > changes will help. Yeah, copying will still hurt. This will only help reading large files, not writing :-/ For that I still need an inspiring idea.