Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265976AbTGAFwm (ORCPT ); Tue, 1 Jul 2003 01:52:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265992AbTGAFwm (ORCPT ); Tue, 1 Jul 2003 01:52:42 -0400 Received: from terminus.zytor.com ([63.209.29.3]:9908 "EHLO terminus.zytor.com") by vger.kernel.org with ESMTP id S265976AbTGAFwi (ORCPT ); Tue, 1 Jul 2003 01:52:38 -0400 Message-ID: <3F0124FC.1010001@zytor.com> Date: Mon, 30 Jun 2003 23:06:52 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3b) Gecko/20030211 X-Accept-Language: en-us, en, sv MIME-Version: 1.0 To: "David S. Miller" CC: linux-kernel@vger.kernel.org Subject: Re: PCI domain stuff References: <1057010214.1277.11.camel@albertc> <20030630231515.GA27813@kroah.com> <20030701040531.GB23597@parcelfarce.linux.theplanet.co.uk> <1057034041.31826.1.camel@rth.ninka.net> <1057039376.32118.3.camel@rth.ninka.net> In-Reply-To: <1057039376.32118.3.camel@rth.ninka.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1466 Lines: 40 David S. Miller wrote: > [ Pater, please retain the CC: list in your replies. I scan > linux-kernel casually at best, and I probably would have missed > this reply of yours under normal circumstances, if you had retained > the CC: list I would have read it via my non-lkml account and therefore > not have missed it. ] Unfortunately, I can't, because I never see it. One of the very few disadvantages with reading LKML via a newsreader. > On Mon, 2003-06-30 at 22:47, H. Peter Anvin wrote: > >>Presumably only on architectures which use memory-mapped IO address >>space. > > On ones that don't we use the x86's existing facilities for doing > this, ioperm() and direct I/O instructions. > > These issues are platform dependant for other reasons anyways > (endianness, barrier instructions needed, etc.) Right. As long as this is clear to people; I'm not sure it always is. Perhaps a libdirectio would be useful? > But everything the most demanding testcase in userspace needs (this > being xfree86) needs can be done with the existing facilities. > > Unlike other people, I do not see the value in having 50 ways to > do the same thing. :-) Agreed with that, *as long as* the implementation is sane. -hpa - 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/