From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753052AbcIIIGD (ORCPT ); Fri, 9 Sep 2016 04:06:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53166 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753032AbcIIIF4 (ORCPT ); Fri, 9 Sep 2016 04:05:56 -0400 Date: Fri, 9 Sep 2016 16:05:50 +0800 From: Baoquan He To: Joerg Roedel Cc: iommu@lists.linux-founda, linux-kernel@vger.kernel.org, dyoung@redhat.com Subject: Re: io_page_fault seen in normal kernel boot log Message-ID: <20160909080550.GD11356@x1.redhat.com> References: <20160905053805.GC29344@x1.redhat.com> <20160905095900.GQ1437@8bytes.org> <20160905101158.GC11356@x1.redhat.com> <20160906091356.GS1437@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160906091356.GS1437@8bytes.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Fri, 09 Sep 2016 08:05:55 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/06/16 at 11:13am, Joerg Roedel wrote: > On Mon, Sep 05, 2016 at 06:11:58PM +0800, Baoquan He wrote: > > On 09/05/16 at 11:59am, Joerg Roedel wrote: > > > > This happened on 4.8.0-rc5 > > > > > > > > [ +0.006771] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001000 flags=0x0000] > > > > [ +0.010593] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001040 flags=0x0000] > > > > [ +0.010596] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001080 flags=0x0000] > > > > [ +0.010597] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x00000000000010c0 flags=0x0000] > > > > [ +0.010592] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001100 flags=0x0000] > > > > [ +0.010592] AMD-Vi: Event logged [IO_PAGE_FAULT device=00:14.4 domain=0x0009 address=0x0000000000001140 flags=0x0000] > > > > > > This is probably a radeon driver issue, the address looks like its > > > handed out by the IOMMU driver, so probably a use-after-free bug. I also > > > see those GPU related faults from time to time. The system usually boots > > > fine anyway. Does boot complete on that system? > > > > Yes, except for this message, system is not impacted. > > Hmm, on the other hand, the AMD-Vi driver in 4.8 uses the generic IOVA > allocator, so the addresses it hands out should be closer to 4GB. > Anyway, this is probably a bug/problem in the GPU driver. Thanks for telling. So should I raise this issue to radeon driver mailist list? They probably they have some clues. Thanks Baoquan