Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757816AbYABKIB (ORCPT ); Wed, 2 Jan 2008 05:08:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753731AbYABKHx (ORCPT ); Wed, 2 Jan 2008 05:07:53 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:53611 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753678AbYABKHx (ORCPT ); Wed, 2 Jan 2008 05:07:53 -0500 Date: Wed, 2 Jan 2008 11:00:41 +0100 From: Ingo Molnar To: "H. Peter Anvin" Cc: Christer Weinigel , Alan Cox , "David P. Reed" , Rene Herman , Paul Rolland , Pavel Machek , Thomas Gleixner , linux-kernel@vger.kernel.org, Ingo Molnar , rol@witbe.net Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override. Message-ID: <20080102100041.GA5888@elte.hu> References: <4766AE88.4080904@zytor.com> <4766D175.7040807@reed.com> <20071217212509.5edaa372@the-village.bc.nu> <477A634C.8040000@reed.com> <20080101161557.3ce2d5f8@the-village.bc.nu> <20080101164338.GA901@elte.hu> <20080101183238.74307174@weinigel.se> <20080101184659.GA9250@elte.hu> <20080101203518.26e889f2@weinigel.se> <477AAEEB.5060407@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <477AAEEB.5060407@zytor.com> 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: 946 Lines: 25 * H. Peter Anvin wrote: > Christer Weinigel wrote: >> >> out 80h, al is only two bytes. Any alternative that has been suggested >> in this discussion will use more space. mov dx, alt_port; out dx, al >> will be larger, a function call will definitely be a lot larger. People >> have been making changes to the kernel to save a couple of hundred >> bytes of text size. >> > > If text size becomes a problem in this case, then we can use an > alternatives-like mechanism to fix up the kernel. However, > realistically this probably should be a function call *combined with* > the out and in; that reduces the impact somewhat. and that's exactly what x86.git#mm does now. 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/