Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765607AbXHGBYb (ORCPT ); Mon, 6 Aug 2007 21:24:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754029AbXHGBYV (ORCPT ); Mon, 6 Aug 2007 21:24:21 -0400 Received: from ns1.suse.de ([195.135.220.2]:48946 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753898AbXHGBYU (ORCPT ); Mon, 6 Aug 2007 21:24:20 -0400 To: Stefan Richter Cc: Robert Hancock , linuxppc-dev@ozlabs.org, stable@kernel.org, linux-kernel@vger.kernel.org, Olaf Hering Subject: Re: [PATCH 2.6.22.y] ieee1394: revert "sbp2: enforce 32bit DMA mapping" References: <46B4B3DC.7020609@shaw.ca> <46B4B7C6.1040107@s5r6.in-berlin.de> <1186272926.938.8.camel@localhost.localdomain> <46B5824B.1000103@s5r6.in-berlin.de> <1186351473.938.21.camel@localhost.localdomain> <20070806135124.GA2900@suse.de> <1186436848.938.75.camel@localhost.localdomain> <46B79F25.50205@s5r6.in-berlin.de> <46B79FD7.9020801@shaw.ca> <46B7A537.9020807@s5r6.in-berlin.de> From: Andi Kleen Date: 07 Aug 2007 04:18:43 +0200 In-Reply-To: <46B7A537.9020807@s5r6.in-berlin.de> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 696 Lines: 14 Stefan Richter writes: > > 1.) The ieee1394 subsystem is known to work on x86_64 with more than 4 > GB RAM, It's actually ~3+GB where memory above the 4GB barrier starts appearing. In some extreme cases even for 2+GB. > so I gather that architecture code already sets a proper DMA > mask for all those 32bit PCI OHCI-1394 implementations out there. If you don't set a DMA mask then the default is always 4GB. -Andi - 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/