From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932275AbWEAVlp (ORCPT ); Mon, 1 May 2006 17:41:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932277AbWEAVlo (ORCPT ); Mon, 1 May 2006 17:41:44 -0400 Received: from sj-iport-4.cisco.com ([171.68.10.86]:51018 "EHLO sj-iport-4.cisco.com") by vger.kernel.org with ESMTP id S932275AbWEAVln (ORCPT ); Mon, 1 May 2006 17:41:43 -0400 X-IronPort-AV: i="4.05,77,1146466800"; d="scan'208"; a="1800327999:sNHT30900044" To: Segher Boessenkool Cc: "Bryan O'Sullivan" , openib-general@openib.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2 of 13] ipath - set up 32-bit DMA mask if 64-bit setup fails X-Message-Flag: Warning: May contain useful information References: <1906950392f7ef8c7d07.1145913778@eng-12.pathscale.com> <4B05D10C-407E-46A5-848F-0897D1E6D1CD@kernel.crashing.org> From: Roland Dreier Date: Mon, 01 May 2006 14:41:39 -0700 In-Reply-To: <4B05D10C-407E-46A5-848F-0897D1E6D1CD@kernel.crashing.org> (Segher Boessenkool's message of "Mon, 1 May 2006 21:56:09 +0200") Message-ID: User-Agent: Gnus/5.1007 (Gnus v5.10.7) XEmacs/21.4.18 (linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 01 May 2006 21:41:41.0385 (UTC) FILETIME=[0888D790:01C66D68] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Segher> PowerPC with U3 or U4 northbridge, i.e. Maple or PowerMac Segher> G5 systems. If the IOMMU (DART) is disabled, we have a Segher> 32-bit only DMA mask. The DART will be disabled by Segher> default if there is 2GB or less of memory (as it isn't Segher> needed then). OK, thanks. I was not aware of that situation. However, I suspect that PathScale has a different situation in mind, considering that their driver isn't even buildable for that platform ;) - R.