Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755504Ab2JVPjz (ORCPT ); Mon, 22 Oct 2012 11:39:55 -0400 Received: from lxorguk.ukuu.org.uk ([81.2.110.251]:48930 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751555Ab2JVPjw (ORCPT ); Mon, 22 Oct 2012 11:39:52 -0400 Date: Mon, 22 Oct 2012 16:44:44 +0100 From: Alan Cox To: Adam Jackson Cc: Lucas Kannebley Tavares , dri-devel@lists.freedesktop.org, Benjamin Herrenschmidt , linux-pci@vger.kernel.org, Nishanth Aravamudan , linux-kernel@vger.kernel.org, Brian King , Bjorn Helgaas Subject: Re: radeon: RFC speed cap detection on ppc64 Message-ID: <20121022164444.2b0775ce@pyramind.ukuu.org.uk> In-Reply-To: <508565FA.4040908@redhat.com> References: <50819140.8030806@linux.vnet.ibm.com> <508565FA.4040908@redhat.com> X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.8; x86_64-redhat-linux-gnu) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 596 Lines: 14 > That (walking all parent nodes) is probably the safest thing to do. I'm > not sure whether it's optimal. It would likely depend on whether you > can meaningfully have a bridge that's faster on the downstream side than > on the upstream. This is architecture goo at heart - would this be better as a helper in the PCI and arch PCI code ? Alan -- 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/