Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262176AbUCVSXe (ORCPT ); Mon, 22 Mar 2004 13:23:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262190AbUCVSXe (ORCPT ); Mon, 22 Mar 2004 13:23:34 -0500 Received: from ns2.uk.superh.com ([193.128.105.170]:31963 "EHLO smtp.uk.superh.com") by vger.kernel.org with ESMTP id S262176AbUCVSXa (ORCPT ); Mon, 22 Mar 2004 13:23:30 -0500 Date: Mon, 22 Mar 2004 18:23:28 +0000 From: Richard Curnow To: LKML Subject: Re: can device drivers return non-ram via vm_ops->nopage? Message-ID: <20040322182328.GH17627@malvern.uk.w2k.superh.com> Mail-Followup-To: LKML References: <20040320150621.GO9009@dualathlon.random> <20040320154419.A6726@flint.arm.linux.org.uk> <20040320160911.B6726@flint.arm.linux.org.uk> <20040320222341.J6726@flint.arm.linux.org.uk> <20040320224518.GQ2045@holomorphy.com> <20040320235445.B24744@flint.arm.linux.org.uk> <1079930812.900.180.camel@gaston> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1079930812.900.180.camel@gaston> User-Agent: Mutt/1.5.6i X-OriginalArrivalTime: 22 Mar 2004 18:25:07.0968 (UTC) FILETIME=[0108B800:01C4103B] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 793 Lines: 17 * Benjamin Herrenschmidt [2004-03-22]: > DRI suffers from similar issue when using PCI GART, but then, it also > doesn't use the consistent alloc routines, it gets pages with GFP, > mmap those into userland, and does pci_map_single in the kernel on > each individual page to obtain the bus addresses. This will not be > pretty on non-coherent architectures though. ... or on platforms where PCI bounce-buffers are being used. -- Richard \\\ SH-4/SH-5 Core & Debug Architect Curnow \\\ SuperH (UK) Ltd, Bristol - 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/