Re: Since Linux 4.1: A lot of AMD-Vi IO_PAGE_FAULTs

[Andreas Hartmann <andihartmann@freenet.de>]

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