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

[Andreas Hartmann <andihartmann@freenet.de>]

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On Tue, Jul 21, 2015 at 06:35PM +0200, Joerg Roedel wrote:
> 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?

Yes. I attached this one.

Meanwhile I tested with 4.0.9, too. I wasn't able to reproduce the
problem with this kernel even after lots of reboots (the problem w/ 4.1
usually comes up during boot process (but not only - it can be seen
after boot process, too)).

The problem always is, that there are errors w/ one of the sata discs
and at the same time, IO_PAGE_FAULT errors are rising as described before:

[  152.533708] ata3.00: failed command: READ FPDMA QUEUED
[  152.538102] ata3.00: failed command: READ FPDMA QUEUED
[  152.539862] ata3.00: failed command: READ FPDMA QUEUED
[  152.541778] ata3.00: failed command: WRITE FPDMA QUEUED
[  152.543861] ata3.00: failed command: WRITE FPDMA QUEUED

[ 5818.068050] ata2.00: failed command: WRITE FPDMA QUEUED
[ 5818.068059] ata2.00: failed command: WRITE FPDMA QUEUED

I compared dmesg from 4.1 w/ 4.0 and I realized the following *missing*
entries in 4.1:

[    0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x02] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x03] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x04] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x05] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x06] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x07] enabled)


What does this mean? Is there missing some part of the acpi initialization?


Thanks for any hint as Linux 4.1 is completely unusable here with these
errors.


Regards,
Andreas

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