Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264138AbTEGWmx (ORCPT ); Wed, 7 May 2003 18:42:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264139AbTEGWmx (ORCPT ); Wed, 7 May 2003 18:42:53 -0400 Received: from neon-gw-l3.transmeta.com ([63.209.4.196]:61956 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id S264138AbTEGWmw (ORCPT ); Wed, 7 May 2003 18:42:52 -0400 To: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Subject: Re: [PATCH] 2.5 ide 48-bit usage Date: 7 May 2003 15:55:13 -0700 Organization: Transmeta Corporation, Santa Clara CA Message-ID: References: <20030507084920.GA823@suse.de> <20030507164613.GN823@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Disclaimer: Not speaking for Transmeta in any way, shape, or form. Copyright: Copyright 2003 H. Peter Anvin - All Rights Reserved Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1074 Lines: 30 Followup to: By author: "Henning P. Schmiedehausen" In newsgroup: linux.dev.kernel > > Jens Axboe writes: > > >I dunno what the purpose of that would be exactly, I guess to cater to > >some hardware odditites? > > Wild guess: You can use larger transfer sizes with the 48 bit > interface, even when adressing the lower 28 bit space? > > This might be a win for applications that stream large contigous > blocks from/to a HD (Video, Audio...) > Right, Jens basically does something like: use_48_bits := (address+length > 2^28) || (length >= 2^16) -hpa -- at work, in private! "Unix gives you enough rope to shoot yourself in the foot." Architectures needed: ia64 m68k mips64 ppc ppc64 s390 s390x sh v850 x86-64 - 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/