Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751117AbVILBGK (ORCPT ); Sun, 11 Sep 2005 21:06:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751122AbVILBGK (ORCPT ); Sun, 11 Sep 2005 21:06:10 -0400 Received: from fmr13.intel.com ([192.55.52.67]:55449 "EHLO fmsfmr001.fm.intel.com") by vger.kernel.org with ESMTP id S1751117AbVILBGJ convert rfc822-to-8bit (ORCPT ); Sun, 11 Sep 2005 21:06:09 -0400 X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Subject: RE: [2/3] Set compatibility flag for 4GB zone on IA64 Date: Sun, 11 Sep 2005 18:05:47 -0700 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [2/3] Set compatibility flag for 4GB zone on IA64 Thread-Index: AcW3KAXWXZbejrJ5SLm7jOPflrp7pwADbXVg From: "Luck, Tony" To: "Jeff Garzik" Cc: , , "Greg Edwards" , , X-OriginalArrivalTime: 12 Sep 2005 01:05:49.0796 (UTC) FILETIME=[1D520A40:01C5B736] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 787 Lines: 21 >Luck, Tony wrote: >> ia64 isn't all that homogeneous. SGI systems stuff *all* memory >> into the DMA zone as their I/O devices have no 32-bit limits (just >> as well really as there is no memory below 4G on an Altix!). > >SGI machines support random PCI cards, right? If so, you >cannot presume >I/O devices have no 32-bit limits. No, SGI machines don't support random PCI cards. The lowest possible physical address in an Altix is 192GB. Cards that can only DMA to addresses below 4G aren't going to be very useful, are they? -Tony - 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/