Re: AMD-Vi IO_PAGE_FAULTs and ata3.00: failed command: READ FPDMA QUEUED errors since Linux 4.0

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On 10/08/2015 at 07:30 PM Joerg Roedel wrote:
> On Wed, Oct 07, 2015 at 07:02:32PM +0200, Andreas Hartmann wrote:
>> Binding the device to vfio isn't a problem (it's done before the vm is
>> started). The problem occurs during start of qemu-system-x86_64 (2.3.0).
>>
>> The attached dmesg.out doesn't show the trace, but the desired iommu dump.
>>
>>> Also, which device are you trying to attach to the guest (pci
>>> bus/device/function)?
>>
>> See attached ath9k.device.
> 
> Hmm, can you also test this again with the v4.3-rc4 please? The device
> you are attaching has its own group and no aliases, so I really can't
> see how the trace could happen, and I can't reproduce it here either.

Unchanged - this time hard locked machine and no trace at all because of
data loss after reboot :-(.

Btw: Linux 4.2 doesn't show this problem.

Nevertheless I'll try to get a trace - maybe I'm lucky and the machine
doesn't lock up completely another time :-).


Regards,
Andreas

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