From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261535AbUKBMrN (ORCPT ); Tue, 2 Nov 2004 07:47:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261533AbUKBMrN (ORCPT ); Tue, 2 Nov 2004 07:47:13 -0500 Received: from mx2.elte.hu ([157.181.151.9]:18336 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S261638AbUKBMp7 (ORCPT ); Tue, 2 Nov 2004 07:45:59 -0500 Date: Tue, 2 Nov 2004 13:46:48 +0100 From: Ingo Molnar To: Con Kolivas Cc: linux , Andrew Morton Subject: Re: [PATCH] remove interactive credit Message-ID: <20041102124648.GF15290@elte.hu> References: <418707CD.1080903@kolivas.org> <20041102123746.GB15290@elte.hu> <41878057.9000302@kolivas.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41878057.9000302@kolivas.org> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Con Kolivas wrote: > >>remove interactive credit > > > >we could try this in -mm, but it obviously needs alot of testing first. > >Do you have any particular workload in mind where the fairness win due > >to this revert would/should be significant? > > Since I created this variable in the first place I can say with quite > some certainty that the size of the advantage is miniscule. Whereas > clearly the design introduces special case mistreatment of only one > type of task. It's an addition to the interactivity code I've often > looked at and regretted doing. yeah, i know, it was the only piece of code from your earlier -Oint scheduler-fixup series i almost didnt ack. But now it's in and testing needs to cross at least one stable kernel boundary before it can be taken out again. (unless a patch is an obvious or important fix.) Ingo