Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752675AbZIXDYN (ORCPT ); Wed, 23 Sep 2009 23:24:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752516AbZIXDYL (ORCPT ); Wed, 23 Sep 2009 23:24:11 -0400 Received: from g4t0014.houston.hp.com ([15.201.24.17]:21576 "EHLO g4t0014.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752462AbZIXDYL (ORCPT ); Wed, 23 Sep 2009 23:24:11 -0400 Subject: Re: fixing "pci=use_crs" From: Bjorn Helgaas To: Yinghai Lu Cc: Larry Finger , Gary Hade , Jesse Barnes , Jaswinder Singh Rajput , Thomas Gleixner , Ingo Molnar , Len Brown , Linus Torvalds , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <86802c440909231628t6b35aae4u706c0c35590bc0d3@mail.gmail.com> References: <200909161715.24376.bjorn.helgaas@hp.com> <200909211520.56800.bjorn.helgaas@hp.com> <4AB95F41.1070500@lwfinger.net> <200909231723.31786.bjorn.helgaas@hp.com> <86802c440909231628t6b35aae4u706c0c35590bc0d3@mail.gmail.com> Content-Type: text/plain Date: Wed, 23 Sep 2009 21:21:42 -0600 Message-Id: <1253762502.12653.4.camel@dc7800.home> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1243 Lines: 32 On Wed, 2009-09-23 at 16:28 -0700, Yinghai Lu wrote: > On Wed, Sep 23, 2009 at 4:23 PM, Bjorn Helgaas wrote: > > P.S. Yinghai, you posted some patches earlier dealing with "only one > > HT chain." You apparently have some insight into what's going on here, > > but unfortunately, the changelogs mean absolutely nothing to me. Can > > you give me any clues? > > which commit? > > normally we only need to have split root resource into several pieces > when we have two HT chains or other io chains... I meant the patches here: http://lkml.org/lkml/2009/6/24/557 My opinion is that ACPI is there to give us an abstract description of the machine, and we shouldn't have to introduce knowledge like "this machine has two HT chains" or add checks in amd_bus.c about "pci_root_num <= 1". But maybe if I knew what an HT chain was and why you think it affects the description returned by _CRS, it would give me a clue about how to deal with this in a generic way. Bjorn -- 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/