From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753231Ab1KOAxh (ORCPT ); Mon, 14 Nov 2011 19:53:37 -0500 Received: from mail2.unitix.de ([176.9.2.175]:56528 "EHLO mail2.unitix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752694Ab1KOAxg (ORCPT ); Mon, 14 Nov 2011 19:53:36 -0500 Message-ID: <4EC1B80D.5000102@arndnet.de> Date: Tue, 15 Nov 2011 01:53:33 +0100 From: Arnd Hannemann User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org CC: dwmw2@infradead.org, iommu@lists.linux-foundation.org Subject: Re: 3.2rc1: bootup fails: DRHD: handling fault status reg 2 References: <4EC19738.8050007@arndnet.de> In-Reply-To: <4EC19738.8050007@arndnet.de> X-Enigmail-Version: 1.4a1pre Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Am 14.11.2011 23:33, schrieb Arnd Hannemann: > when trying to boot kernel 3.2rc1 on my thinkpad t510 I get an endless loop of errors: > > DRHD: handling fault status reg 2 > DMAR: [DMA Read] Request device [0d:00.0] fault addr fffff000 > DMAR: [fault reason 02] Present bit in context entry is clear > > screenshot can be found here: > http://arndnet.de/lkml/screenshot3.2rc1.jpg > > kernel 3.1.1 is booting up flawlessly. I must have inadvertently enabled CONFIG_INTEL_IOMMU_DEFAULT_ON in my config for 3.2-rc1. With disabled CONFIG_INTEL_IOMMU_DEFAULT_ON my thinkpad boots up again. Not sure if this is expected? Best regards Arnd