From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-pci-owner@vger.kernel.org>
Received: from mx1.redhat.com ([209.132.183.28]:60743 "EHLO mx1.redhat.com"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1751428AbbGaI24 (ORCPT <rfc822;linux-pci@vger.kernel.org>);
	Fri, 31 Jul 2015 04:28:56 -0400
Subject: Re: [dm-devel] AMD-Vi IO_PAGE_FAULTs and ata3.00: failed command:
 READ FPDMA QUEUED errors since Linux 4.0
To: Andreas Hartmann <andihartmann@freenet.de>,
	device-mapper development <dm-devel@redhat.com>,
	Ondrej Kozina <okozina@redhat.com>
References: <55B7BEA2.30205@01019freenet.de>
 <20150728175054.GB24782@redhat.com> <55B7C800.2070702@maya.org>
 <20150728185811.GA25060@redhat.com> <55B7D6BE.5010203@maya.org>
 <20150728193101.GB25264@redhat.com> <55B7E14A.4050500@maya.org>
 <20150728212441.GA25761@redhat.com> <55B87005.7010409@redhat.com>
 <55B8759B.8070400@redhat.com> <55B90C25.8030502@maya.org>
 <55BA895D.30509@maya.org> <55BB2284.1060706@redhat.com>
 <55BB2A02.70700@maya.org>
Cc: linux-pci <linux-pci@vger.kernel.org>,
	Mike Snitzer <msnitzer@redhat.com>, mpatocka@redhat.com
From: Milan Broz <mbroz@redhat.com>
Message-ID: <55BB31C5.9020407@redhat.com>
Date: Fri, 31 Jul 2015 10:28:53 +0200
MIME-Version: 1.0
In-Reply-To: <55BB2A02.70700@maya.org>
Content-Type: text/plain; charset=windows-1252
Sender: linux-pci-owner@vger.kernel.org
List-ID: <linux-pci.vger.kernel.org>

On 07/31/2015 09:55 AM, Andreas Hartmann wrote:
> On 07/31/2015 at 09:23 AM, Milan Broz wrote:

...

>> - if you disable NCQ, the problems goes away?
> 
> As I already wrote in another post - than other error came up instead
> (radeon). But I will try it especially again in conjunction w/
> --perf-submit_from_crypt_cpus --perf-same_cpu_crypt.

Yes, I know, But this is probably just some unfortunate side effect,
this code definitely does not relate to Radeon code.
(Could be some minor compiler change, whatever...)

Thanks,
Milan