Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758700AbXJaACX (ORCPT ); Tue, 30 Oct 2007 20:02:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753133AbXJaACP (ORCPT ); Tue, 30 Oct 2007 20:02:15 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:48946 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752415AbXJaACO (ORCPT ); Tue, 30 Oct 2007 20:02:14 -0400 Date: Tue, 30 Oct 2007 17:02:02 -0700 (PDT) From: Linus Torvalds To: Arjan van de Ven cc: Robert Hancock , Greg KH , Jesse Barnes , akpm@linux-foundation.org, ak@suse.de, rajesh.shah@intel.com, linux-kernel Subject: Re: pci-disable-decode-of-io-memory-during-bar-sizing.patch In-Reply-To: <20071030165202.14651248@laptopd505.fenrus.org> Message-ID: References: <200708151919.l7FJJfUE010966@imap1.linux-foundation.org> <200710251622.36773.jbarnes@virtuousgeek.org> <20071026025407.GA21408@kroah.com> <200710260959.46811.jbarnes@virtuousgeek.org> <20071027024140.GC29039@kroah.com> <47267232.3020506@shaw.ca> <20071030094756.779ac5c0@laptopd505.fenrus.org> <4727C126.8070000@shaw.ca> <20071030165202.14651248@laptopd505.fenrus.org> 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: 925 Lines: 23 On Tue, 30 Oct 2007, Arjan van de Ven wrote: > > it's per device so that if you have have no users for this stuff, > you'll never ever get bitten by bugs (be it linux or the bios). Exactly. It's not that we care about trying to protect a system that really needs to use MMCFG - once you really *really* need it, you're screwed if it doesn't work. But currently 99% of all systems will never need it, and for the broken platforms, that's a nice round 100%. So if we make code not use MMCFG by default, and you have to enable it for just those device drivers that really want it and care, you automatically avoid all the broken hardware, with no real downsides. Linus - 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/