From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934477Ab1KJDY7 (ORCPT ); Wed, 9 Nov 2011 22:24:59 -0500 Received: from cantor2.suse.de ([195.135.220.15]:42097 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933985Ab1KJDYy (ORCPT ); Wed, 9 Nov 2011 22:24:54 -0500 X-Mailbox-Line: From gregkh@clark.kroah.org Wed Nov 9 13:27:07 2011 Message-Id: <20111109212706.992069651@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Wed, 09 Nov 2011 13:26:28 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Jesse Barnes , linux-pci@vger.kernel.org, Konrad Rzeszutek Wilk Subject: [066/262] xen-pcifront: Update warning comment to use e820_host option. In-Reply-To: <20111109212847.GA20838@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Konrad Rzeszutek Wilk commit 917e3e65c35459d52f0d0b890aa5df0cad07a051 upstream. With Xen changeset 23428 "libxl: Add 'e820_host' option to config file" the E820 as seen from the host can now be passed into the guest. This means that a PV guest can now: - Use the correct PCI I/O gap. Before these patches, Linux guest would boot up and would tell: [ 0.000000] Allocating PCI resources starting at 40000000 (gap: 40000000:c0000000) while in actuality the PCI I/O gap should have been: [ 0.000000] Allocating PCI resources starting at b0000000 (gap: b0000000:4c000000) - The PV domain with PCI devices was limited to 3GB. It now can be booted with 4GB, 8GB, or whatever number you want. The PCI devices will now _not_ conflict with System RAM. Meaning the drivers can load. CC: Jesse Barnes CC: linux-pci@vger.kernel.org [v2: Made the string less broken up. Suggested by Joe Perches] Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman --- drivers/pci/xen-pcifront.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/drivers/pci/xen-pcifront.c +++ b/drivers/pci/xen-pcifront.c @@ -400,9 +400,8 @@ static int pcifront_claim_resource(struc dev_info(&pdev->xdev->dev, "claiming resource %s/%d\n", pci_name(dev), i); if (pci_claim_resource(dev, i)) { - dev_err(&pdev->xdev->dev, "Could not claim " - "resource %s/%d! Device offline. Try " - "giving less than 4GB to domain.\n", + dev_err(&pdev->xdev->dev, "Could not claim resource %s/%d! " + "Device offline. Try using e820_host=1 in the guest config.\n", pci_name(dev), i); } }