From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261585AbVGOKY1 (ORCPT ); Fri, 15 Jul 2005 06:24:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261353AbVGOKY0 (ORCPT ); Fri, 15 Jul 2005 06:24:26 -0400 Received: from mx1.elte.hu ([157.181.1.137]:64642 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S261585AbVGOKXz (ORCPT ); Fri, 15 Jul 2005 06:23:55 -0400 Date: Fri, 15 Jul 2005 12:23:11 +0200 From: Ingo Molnar To: Daniel Walker Cc: Dave Chinner , Nathan Scott , Steve Lord , linux-kernel@vger.kernel.org, linux-xfs@oss.sgi.com, Christoph Hellwig Subject: Re: RT and XFS Message-ID: <20050715102311.GA5302@elte.hu> References: <1121209293.26644.8.camel@dhcp153.mvista.com> <20050713002556.GA980@frodo> <20050713064739.GD12661@elte.hu> <1121273158.13259.9.camel@c-67-188-6-232.hsd1.ca.comcast.net> <20050714002246.GA937@frodo> <20050714135023.E241419@melbourne.sgi.com> <1121314226.14816.18.camel@c-67-188-6-232.hsd1.ca.comcast.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1121314226.14816.18.camel@c-67-188-6-232.hsd1.ca.comcast.net> User-Agent: Mutt/1.4.2.1i 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 * Daniel Walker wrote: > PI is always good, cause it allows the tracking of what is high > priority , and what is not . that's just plain wrong. PI might be good if one cares about priorities and worst-case latencies, but most of the time the kernel is plain good enough and we dont care. PI can also be pretty expensive. So in no way, shape or form can PI be "always good". Ingo