Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760657AbdLSKhZ (ORCPT ); Tue, 19 Dec 2017 05:37:25 -0500 Received: from mail.netline.ch ([148.251.143.178]:48768 "EHLO netline-mail3.netline.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758663AbdLSKhU (ORCPT ); Tue, 19 Dec 2017 05:37:20 -0500 Subject: Re: nouveau. swiotlb: coherent allocation failed for device 0000:01:00.0 size=2097152 To: Tobias Klausmann , Mike Galbraith Cc: LKML , nouveau , Ben Skeggs , dri-devel , =?UTF-8?Q?Christian_K=c3=b6nig?= References: <1513620418.7113.51.camel@gmx.de> From: =?UTF-8?Q?Michel_D=c3=a4nzer?= Message-ID: Date: Tue, 19 Dec 2017 11:37:15 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1223 Lines: 35 On 2017-12-18 08:01 PM, Tobias Klausmann wrote: > On 12/18/17 7:06 PM, Mike Galbraith wrote: >> Greetings, >> >> Kernel bound workloads seem to trigger the below for whatever reason. >>   I only see this when beating up NFS.  There was a kworker wakeup >> latency issue, but with a bandaid applied to fix that up, I can still >> trigger this. > > > Hi, > > i have seen this one as well with my system, but i could not find an > easy way to trigger it for bisecting purpose. If you can trigger it > conveniently, a bisect would be nice! I'm seeing this (with the amdgpu and radeon drivers) when restic takes a backup, creating memory pressure. I happen to have just finished bisecting, the result is: 648bc3574716400acc06f99915815f80d9563783 is the first bad commit commit 648bc3574716400acc06f99915815f80d9563783 Author: Christian König Date: Thu Jul 6 09:59:43 2017 +0200 drm/ttm: add transparent huge page support for DMA allocations v2 Try to allocate huge pages when it makes sense. v2: fix comment and use ifdef -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer