From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-da0-f45.google.com ([209.85.210.45]:48504 "EHLO mail-da0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753230Ab3BDSg7 (ORCPT ); Mon, 4 Feb 2013 13:36:59 -0500 Received: by mail-da0-f45.google.com with SMTP id w4so2780476dam.18 for ; Mon, 04 Feb 2013 10:36:58 -0800 (PST) Date: Mon, 4 Feb 2013 10:36:45 -0800 From: Stephen Hemminger To: Bjorn Helgaas Cc: linux-pci@vger.kernel.org, David Woodhouse , iommu@lists.linux-foundation.org, alex.williamson@redhat.com Subject: Re: PCI warning on boot 3.8.0-rc1 Message-ID: <20130204103645.38ae2d5e@nehalam.linuxnetplumber.net> In-Reply-To: References: <20130116143853.339dd89b@nehalam.linuxnetplumber.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-pci-owner@vger.kernel.org List-ID: > I think drivers/pci/search.c is identical between 3.7 and 3.8-rc1. Is > this the first time you've turned on the IOMMU on that box? It exists in 3.7 and earlier kernels, just haven't turned on same config. > It's the same warning as in this bugzilla: > https://bugzilla.kernel.org/show_bug.cgi?id=44881, and there's a patch > there at https://bugzilla.kernel.org/show_bug.cgi?id=44881#c11, but > it's just a quirk that turns off VT-d if we find certain broken > bridges. It doesn't look like you have any of those (although I don't > know what you have at 05:00.0). > > Bjorn This is a standard ASUS motherboard, and don't want to disable VT-d.