Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755485AbYAAQtj (ORCPT ); Tue, 1 Jan 2008 11:49:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753604AbYAAQtb (ORCPT ); Tue, 1 Jan 2008 11:49:31 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:41750 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751483AbYAAQta (ORCPT ); Tue, 1 Jan 2008 11:49:30 -0500 Date: Tue, 1 Jan 2008 17:48:55 +0100 From: Ingo Molnar To: Pavel Machek Cc: Alan Cox , Rene Herman , Linus Torvalds , dpreed@reed.com, Islam Amer , hpa@zytor.com, Ingo Molnar , Andi Kleen , Thomas Gleixner , Linux Kernel Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override Message-ID: <20080101164855.GA3488@elte.hu> References: <20071230144700.78f4605c@the-village.bc.nu> <20071230152835.GX16946@elte.hu> <4777BDA5.4050203@keyaccess.nl> <20071230160751.GB26221@elte.hu> <4777C6E8.7060202@keyaccess.nl> <20071230170612.GA16502@elte.hu> <20071230182937.40f2adcf@the-village.bc.nu> <20071230204650.GA26120@elte.hu> <20071231131107.GA26339@ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071231131107.GA26339@ucw.cz> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 868 Lines: 22 * Pavel Machek wrote: > > well, using io_delay=udelay is not 'blindly disabling'. > > io_delay=none would be the end goal, once all _p() API uses are > > eliminated by transformation. In drivers/ alone that's more than > > 1000 callsites, so it's quite frequently used, and wont go away > > overnight. > > IOW elimination of broken inb_p()/outb_p() interfaces is the ultimate > goal. Agreed. yeah - although i'd not call it "broken", it's simply historic, and due to the side-effects of the _implementation_, a few non-standard uses (such as reliance on PCI posting/flushing effects) grew. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/