From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout0.freenet.de ([195.4.92.90]:60104 "EHLO mout0.freenet.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751503AbbGURwc (ORCPT ); Tue, 21 Jul 2015 13:52:32 -0400 Subject: Re: Since Linux 4.1: A lot of AMD-Vi IO_PAGE_FAULTs To: Joerg Roedel , Andreas Hartmann References: <55AE5F84.5020204@01019freenet.de> <1437492886.1391.847.camel@redhat.com> <20150721155635.GE10969@8bytes.org> <55AE7147.7070902@maya.org> <20150721163517.GG10969@8bytes.org> Cc: Alex Williamson , linux-pci , iommu From: Andreas Hartmann Message-ID: <55AE85B2.2000004@maya.org> Date: Tue, 21 Jul 2015 19:47:30 +0200 MIME-Version: 1.0 In-Reply-To: <20150721163517.GG10969@8bytes.org> Content-Type: text/plain; charset=windows-1252 Sender: linux-pci-owner@vger.kernel.org List-ID: Am 21.07.2015 um 18:35 schrieb Joerg Roedel: > On Tue, Jul 21, 2015 at 06:20:23PM +0200, Andreas Hartmann wrote: >> [ 48.193901] <6>[fglrx] Firegl kernel thread PID: 1840 >> [ 48.193985] <6>[fglrx] Firegl kernel thread PID: 1841 >> [ 48.194063] <6>[fglrx] Firegl kernel thread PID: 1842 >> [ 48.194172] <6>[fglrx] IRQ 28 Enabled >> [ 48.261580] <6>[fglrx] Reserved FB block: Shared offset:0, size:1000000 >> [ 48.261586] <6>[fglrx] Reserved FB block: Unshared offset:f7b4000, size:4000 >> [ 48.261587] <6>[fglrx] Reserved FB block: Unshared offset:f7b8000, size:548000 >> [ 48.261588] <6>[fglrx] Reserved FB block: Unshared offset:3fff3000, size:d000 > > From a first glance it doesn't look like an IOMMU driver issue, because > the addresses where the faults happen are not from the AMD IOMMU driver. > > And you have proprietary closed-source drivers loaded, can you reproduce > the issue without fglrx? The problem is, that the errors can't be seen always - only sometimes. I could see them before w/ or w/o fglrx. There have been situations where the machine didn't boot at all because of ata errors. But I never had any problem w/ Linux 3.18.x or less. Most probably you're right and it is not an IOMMU driver issue but maybe a problem w/ the ahci driver. I have to keep track of it. Thanks for your estimation. Regards, Andreas