Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161390AbWKHSUL (ORCPT ); Wed, 8 Nov 2006 13:20:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754639AbWKHSUL (ORCPT ); Wed, 8 Nov 2006 13:20:11 -0500 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:14479 "EHLO ebiederm.dsl.xmission.com") by vger.kernel.org with ESMTP id S1754629AbWKHSUJ (ORCPT ); Wed, 8 Nov 2006 13:20:09 -0500 From: ebiederm@xmission.com (Eric W. Biederman) To: Andrew Morton Cc: "Yinghai Lu" , "Greg KH" , "Andi Kleen" , linux-kernel Subject: Re: [Patch] PCI: check szhi when sz is 0 for 64 bit pref mem References: <86802c440611032127u33442a33ufc4cf3b11e9b8c7a@mail.gmail.com> <20061106140432.44d3c19f.akpm@osdl.org> Date: Wed, 08 Nov 2006 11:19:40 -0700 In-Reply-To: <20061106140432.44d3c19f.akpm@osdl.org> (Andrew Morton's message of "Mon, 6 Nov 2006 14:04:32 -0800") Message-ID: User-Agent: Gnus/5.110004 (No Gnus v0.4) Emacs/21.4 (gnu/linux) 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: 920 Lines: 23 Andrew Morton writes: > On Fri, 3 Nov 2006 21:27:35 -0800 > "Yinghai Lu" wrote: > >> For co-prcessor with mem installed, the ram will be treated to pref mem. > > What is "pref mem"? Memory mapped base address registers can be either normal or for prefetchable sections of memory mapped I/O. Frequently all prefetchable bars are 64bit. The prefetchable bars are also frequently ask for the largest amounts of memory. So it is easy and worthwhile to place all prefetchable bars about 4G. The "pref mem" short hand comes from a the LinuxBIOS print statements that report every bar value and what kind of bar it is, during boot up. Eric - 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/