From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757066Ab2CLVNt (ORCPT ); Mon, 12 Mar 2012 17:13:49 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1510 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752920Ab2CLVNr (ORCPT ); Mon, 12 Mar 2012 17:13:47 -0400 Date: Mon, 12 Mar 2012 17:13:33 -0400 From: Josh Boyer To: Keith Packard Cc: Dave Jones , Yang Bai , Fengguang Wu , Linux Kernel , Fedora Kernel Team , kernel@tesarici.cz, David Woodhouse Subject: Re: inode->i_wb_list corruption. Message-ID: <20120312211333.GB20204@zod.bos.redhat.com> References: <20120307072608.GA24087@localhost> <20120307104240.GB18658@quack.suse.cz> <20120309145713.GA21543@redhat.com> <20120309151951.GA30160@redhat.com> <20120309180015.GA3862@redhat.com> <868vj97d20.fsf@sumi.keithp.com> <20120309201934.GN17489@zod.bos.redhat.com> <861up175su.fsf@sumi.keithp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <861up175su.fsf@sumi.keithp.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 09, 2012 at 02:44:49PM -0800, Keith Packard wrote: > <#part sign=pgpmime> > On Fri, 9 Mar 2012 15:19:34 -0500, Josh Boyer wrote: > > > Is the VT-d issue something in the hardware itself, or do you mean if > > you have it enabled in the kernel? We've had the intel IOMMU disabled > > by default in the Fedora kernels for a while now. At least since before > > 3.2 was released. > > I don't know for sure; David Woodhouse gave a scary presentation > yesterday that makes me unsure of what happens when IOMMU is disabled in > the kernel, given that much of the hardware is setup by the BIOS. Is that presentation something that could be shared? I have to say, hearing that doesn't really inspire confidence in either the IOMMU or the kernel. josh