From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753685Ab3AWPAZ (ORCPT ); Wed, 23 Jan 2013 10:00:25 -0500 Received: from tx2ehsobe004.messaging.microsoft.com ([65.55.88.14]:55601 "EHLO tx2outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752766Ab3AWPAY (ORCPT ); Wed, 23 Jan 2013 10:00:24 -0500 X-Forefront-Antispam-Report: CIP:163.181.249.109;KIP:(null);UIP:(null);IPV:NLI;H:ausb3twp02.amd.com;RD:none;EFVD:NLI X-SpamScore: -9 X-BigFish: VPS-9(z21eIzbb2dI98dI9371I936eI1be0I103dK1432Izz1ee6h1de0h1202h1e76h1d1ah1d2ahzz177df4h17326ah8275eha1495iz2dh668h839h93fhd25he5bhf0ah1288h12a5h12a9h12bdh137ah13b6h1441h1504h1537h153bh162dh1631h1758h1765h18e1h1155h) X-WSS-ID: 0MH330G-02-6NF-02 X-M-MSG: Message-ID: <50FFFAF3.7030107@amd.com> Date: Wed, 23 Jan 2013 09:00:03 -0600 From: Suravee Suthikulpanit User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2 MIME-Version: 1.0 To: Udo van den Heuvel CC: Boris Ostrovsky , Jacob Shin , Borislav Petkov , =?UTF-8?B?SsO2cmcgUsO2ZGVs?= , Subject: Re: 3.6.11 AMD-Vi: Completion-Wait loop timed out References: <50FBC7EF.6040207@xs4all.nl> <20130120103652.GB16800@pd.tnic> <50FBC994.8020409@xs4all.nl> <20130120111920.GL25591@8bytes.org> <50FBD413.1000406@xs4all.nl> <20130120114011.GN25591@8bytes.org> <20130120114828.GB16519@pd.tnic> <20130121160450 <50FE9E76.30702@xs4all.nl> <50FEA3F2.1070408@amd.com> <50FEAFEB.7020103@xs4all.nl> <50FEBA69.60106@amd.com> <50FEBE5D.7040905@xs4all.nl> <50FF20F2.9090503@amd.com> <50FFF15E.7010403@xs4all.nl> In-Reply-To: <50FFF15E.7010403@xs4all.nl> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-OriginatorOrg: amd.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/23/2013 8:19 AM, Udo van den Heuvel wrote: > On 2013-01-23 00:29, Suravee Suthikulanit wrote: >> I sent out a patch >> (http://marc.info/?l=linux-kernel&m=135889686523524&w=2) which should >> implement >> the workaround for AMD processor family15h model 10-1Fh erratum 746 in >> the IOMMU driver. >> In your case, the output from "setpci -s 00:00.02 F4.w" is "0050" which >> tells me that BIOS doesn't >> implement the work around. After patching, you should see the following >> message in "dmesg". >> >> "AMD-Vi: Applying erratum 746 for IOMMU at 0000:00:00.2" > Thanks! > I'll check for that after these messages. > >> The following patch slightly modify >> the code to always issue "COMPLETION_WAIT" after every command. This >> should help increasing the chance of reproducing >> the issue. > Should I test with these two patches together? > Or should I apply the first one first and then see what the second can help? Please try the first one first. If the issue doesn't reproduce, you can use the second patch to try to trigger it. Thank you, Suravee > > > Kind regards, > Udo >