Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 13 Dec 2001 16:07:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 13 Dec 2001 16:07:04 -0500 Received: from mail.libertysurf.net ([213.36.80.91]:60972 "EHLO mail.libertysurf.net") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Thu, 13 Dec 2001 16:06:58 -0500 Date: Thu, 13 Dec 2001 19:13:01 +0100 (CET) From: =?ISO-8859-1?Q?G=E9rard_Roudier?= X-X-Sender: To: "David S. Miller" cc: , , , , Subject: Re: highmem, aic7xxx, and vfat: too few segs for dma mapping In-Reply-To: <20011213.123008.21927765.davem@redhat.com> Message-ID: <20011213190118.D2184-100000@gerard> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 13 Dec 2001, David S. Miller wrote: > From: G?rard Roudier > Date: Thu, 13 Dec 2001 17:17:22 +0100 (CET) > > PS: Don't take the wrong way my statements against Sun stuff. In fact, I > dislike almost everything that comes and came from them. :) > > Unfortunately the things you complain about are anything but Sun or > Sparc specific. PPC64, MIPS64, Alpha, HPPA, and probably others I > have forgotten (oh yes and IA64 in the future if Intel gets their > heads out of their asses) all have IOMMU mechanisms in their PCI > controllers. Might just be contagious brain disease. :) > This disease may even some day infect x86 systems. In fact > technically it already has, most AMD chipsets use a slightly modified > Alpha PCI controller which does have an IOMMU hidden deep down inside > of it :-) > > Like I said before, the fact that PCI allows this to work is a feature > that is actually better for PCI's relevance and longevity, not worse. > > Or do you suggest that it is wiser to use bounce buffering to handle > 32-bit cards on systems with more than 4GB of ram? :-) Using all > 64-bit capable cards is not an answer, especially when the big > advantage of PCI is how commoditized and flooded the market is with > 32-bit cards. If things happened this way for the last 20 years, then the typical CPU nowaday would probably look like a 20 GHz Z80. :) When I purchased my PIII 233 MHz 4 years ago, I thought that my next system will be a full 64 bit system. Indeed I was dreaming. Btw, I donnot consider an hybrid 32bit path / 64bit path system to be a 64 bit system. I understand the deal between making money and doing things right. In the job I earn from, the former obviously applies, but I didn't earn a single euro-cent from free software. So, allow me, at least as long as this will not be changed, not to agree with you here and stop the discussion as a result. G?rard. - 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/