From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [BUGREPORT] Intel X58 Boards don't boot after "iommu/vt-d: Make root entry visible for hardware right after allocation" Date: Mon, 25 Apr 2016 13:01:51 +0200 Message-ID: <20160425110151.GE17926@8bytes.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Dheeraj CVR Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: iommu@lists.linux-foundation.org On Mon, Apr 25, 2016 at 07:19:52AM +0400, Dheeraj CVR wrote: > I have tried to grab details about the kernel panic stack trace to make it > easier for Joerg to identify and fix the issue. I have downloaded the latest > Kubuntu Live ISO image which is based on kernel 4.2.0. I have changed the boot > parameters to boot with intel_iommu=on. I was able to capture the kernel panic > with slow motion video recording. The hard lockup appears to occur when calling > "flush_context". Can you please send me the dmesg output of a kernel that works right after boot? Thanks, Joerg