Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261938AbTIVS2T (ORCPT ); Mon, 22 Sep 2003 14:28:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261939AbTIVS2T (ORCPT ); Mon, 22 Sep 2003 14:28:19 -0400 Received: from mail.jlokier.co.uk ([81.29.64.88]:32385 "EHLO mail.jlokier.co.uk") by vger.kernel.org with ESMTP id S261938AbTIVS2S (ORCPT ); Mon, 22 Sep 2003 14:28:18 -0400 Date: Mon, 22 Sep 2003 19:28:08 +0100 From: Jamie Lokier To: Arjan van de Ven Cc: Alan Cox , "Eric W. Biederman" , Linux Kernel Mailing List Subject: Re: Can we kill f inb_p, outb_p and other random I/O on port 0x80, in 2.6? Message-ID: <20030922182808.GA28372@mail.jlokier.co.uk> References: <1064229778.8584.2.camel@dhcp23.swansea.linux.org.uk> <20030922162602.GB27209@mail.jlokier.co.uk> <1064248391.8895.6.camel@dhcp23.swansea.linux.org.uk> <1064250691.6235.2.camel@laptop.fenrus.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1064250691.6235.2.camel@laptop.fenrus.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 605 Lines: 21 Arjan van de Ven wrote: > The first person to complain about the extra branch miss in udelay for > this will get laughed at by me ;) udelay(1) is too slow on a 386 even without the branch miss. If you think I/O operations are infinitely slower than other instructions, please explain why there is asm-optimised I/O code in asm-i386/floppy.h. :) -- Jamie - 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/