3.6.8: dmar: DRHD: handling fault status reg 602

3.6.8: dmar: DRHD: handling fault status reg 602

[Justin Piszcz]

Hello,

Any idea why this is happening (e.g. why is PTE Read Access not set?)

[   13.204560] dmar: DRHD: handling fault status reg 602
[   13.208078] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   13.208078] DMAR:[fault reason 06] PTE Read access is not set
[   15.777874] dmar: DRHD: handling fault status reg 702
[   15.777879] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   15.777879] DMAR:[fault reason 06] PTE Read access is not set
[   16.100453] dmar: DRHD: handling fault status reg 2
[   16.100458] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   16.100458] DMAR:[fault reason 06] PTE Read access is not set
[   16.141058] dmar: DRHD: handling fault status reg 102
[   16.141062] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   16.141062] DMAR:[fault reason 06] PTE Read access is not set
[   16.210102] dmar: DRHD: handling fault status reg 202
[   16.210111] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   16.210111] DMAR:[fault reason 06] PTE Read access is not set
[   16.918149] ixgbe 0000:86:00.0: eth2: NIC Link is Up 10 Gbps, Flow
Control: RX/TX

This is from:
http://lkml.org/lkml/2012/11/27/263

Justin.

RE: 3.6.8: dmar: DRHD: handling fault status reg 602

[Justin Piszcz]

-----Original Message-----
From: Justin Piszcz [mailto:jpiszcz@lucidpixels.com] 
Sent: Tuesday, November 27, 2012 10:16 AM
To: linux-kernel@vger.kernel.org
Subject: 3.6.8: dmar: DRHD: handling fault status reg 602

Hello,

Any idea why this is happening (e.g. why is PTE Read Access not set?)

[   13.204560] dmar: DRHD: handling fault status reg 602
[   13.208078] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   13.208078] DMAR:[fault reason 06] PTE Read access is not set
[   15.777874] dmar: DRHD: handling fault status reg 702
[   15.777879] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   15.777879] DMAR:[fault reason 06] PTE Read access is not set
[   16.100453] dmar: DRHD: handling fault status reg 2
[   16.100458] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   16.100458] DMAR:[fault reason 06] PTE Read access is not set
[   16.141058] dmar: DRHD: handling fault status reg 102
[   16.141062] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   16.141062] DMAR:[fault reason 06] PTE Read access is not set
[   16.210102] dmar: DRHD: handling fault status reg 202
[   16.210111] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
[   16.210111] DMAR:[fault reason 06] PTE Read access is not set
[   16.918149] ixgbe 0000:86:00.0: eth2: NIC Link is Up 10 Gbps, Flow
Control: RX/TX

This is from:
http://lkml.org/lkml/2012/11/27/263

Justin.

--

Hi,

Disregard, appears to be a nouveau bug:
https://bugzilla.redhat.com/show_bug.cgi?id=573173

Justin.

Re: 3.6.8: dmar: DRHD: handling fault status reg 602

[Robert Hancock]

On 11/27/2012 09:16 AM, Justin Piszcz wrote:
> Hello,
>
> Any idea why this is happening (e.g. why is PTE Read Access not set?)
>
> [   13.204560] dmar: DRHD: handling fault status reg 602
> [   13.208078] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
> [   13.208078] DMAR:[fault reason 06] PTE Read access is not set
> [   15.777874] dmar: DRHD: handling fault status reg 702
> [   15.777879] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
> [   15.777879] DMAR:[fault reason 06] PTE Read access is not set
> [   16.100453] dmar: DRHD: handling fault status reg 2
> [   16.100458] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
> [   16.100458] DMAR:[fault reason 06] PTE Read access is not set
> [   16.141058] dmar: DRHD: handling fault status reg 102
> [   16.141062] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
> [   16.141062] DMAR:[fault reason 06] PTE Read access is not set
> [   16.210102] dmar: DRHD: handling fault status reg 202
> [   16.210111] dmar: DMAR:[DMA Read] Request device [04:00.0] fault addr 0
> [   16.210111] DMAR:[fault reason 06] PTE Read access is not set
> [   16.918149] ixgbe 0000:86:00.0: eth2: NIC Link is Up 10 Gbps, Flow
> Control: RX/TX
>
> This is from:
> http://lkml.org/lkml/2012/11/27/263
>
> Justin.
>

 From the dmesg you posted (and some comments on that thread) it might 
have something to do with CONFIG_PCI_MMCONFIG being disabled. If so, try 
enabling that.

Of course the DMAR stuff should be recovering from that more gracefully 
if that's the problem.