[vfio-users] Win 10 VM often freezes Linux when shutting down

[Jens Zimmermann]

I am using PCIE1 for the nvidia 210 (host) and PCIE3 for nvidia 750 Ti
(guest): http://i.imgur.com/iFR7Vn9.png
With the 5820k the lane distribution is 16 (PCI1) /8 (PCIE3) / 4 (PCIE5),
so there are not many options to choose from. Actually I would prefer to
have the 750 Ti in slot 1 so it would have more lanes, but I could not find
any option to boot from a different slot than 1. Do you happen to know how
I could use the 210 for my Linux host and still get 16 lanes for the 750 Ti?


Alex, your guess is correct, it's Intel Corporation C610/X99 series chipset
HD Audio Controller which I use for sound both on my host and guest (not at
the same time).
Regarding nodedev-detach and managed="no", I can only do it for the
graphics card since I need all the other devices for the host after the VM
was shut down, right? So I would do "virsh nodedev-detach pci_0000_01_00_0"
and "virsh nodedev-detach pci_0000_01_00_1" and then set managed="no" for
both devices? Do I need to apply the nodedev-detach command every time I
boot the PC?
If it is some other assigned device that is causing the freezes there is
nothing I can do which does not result in a reboot?

Mario, I am using vfio-pci to bind the GPU audio and then assign it to the
VM. So are you suggesting to not assign it to the VM in the first place or
what do you do? :-)
Concerning Windows fast startup, I know about the option you are talking
about and I had searched for it before already, but it does not exist on my
Windows for whatever reason (maybe because it is not activated yet). If I
understand it correctly the full shutdown should prevent the fast startup
though.

-

Thank you for all your replies, guys, there is room for hope again. :-)

2016-02-17 23:03 GMT+01:00 Nick Sukharev <nicksukharev at gmail.com>:

> I have the same mobo and CPU and I have a similar issue with AMD cards. I
> can go may be through 5-6 VM restarts before the host completely freezes. I
> thought it is called "AMD reset issue" but may be not considering that you
> have NVidia cards. For me it seems to matter what PCIE slot the card uses,
> what slot you are trying with passthrough card?
>
> On Wed, Feb 17, 2016 at 1:41 PM, Jens Zimmermann <
> zimmermannjens888 at gmail.com> wrote:
>
>> Hello guys!
>>
>> I have a Windows 10 VM with GPU passsthrough working for around 2 months
>> now and while there were no problems in the very beginning as far as I can
>> tell, soon after the VM started to freeze my Linux sometimes after I shut
>> it down.
>> The strange thing is that it does not happen every time. It seems like it
>> usually happens when the VM was running for quite some time like an hour or
>> two.
>> I thought it may be the Windows shut down which is by default some kind
>> of hibernate, so I shut down Windows by using the command "shutdown /s
>> /t0", but that did not help. I also tried force stopping the VM, that led
>> to a freeze as well.
>>
>> I presume the error is caused by Linux not being able to integrate the
>> virtual/passed through hardware into the system again somehow. Perhaps it's
>> the memory since the freezes usually happen when the VM was running for
>> some time, but this is just a wild guess, I am no linux expert at all.
>>
>> This is journalctl of the most recent freeze, VM was started at 20:13 and
>> shut down at 21:09, followed by a freeze: http://pastebin.com/mwQsFsKB
>> In comparison this time it did not freeze, start at 21:33, finishes at
>> 21:55: http://pastebin.com/YGPnVPBD
>>
>> My setup: i7-5820k, ASRock x99 Extreme 4, 16GB RAM, nvidia 210 & 750 Ti,
>> two monitors, mice and keyboards, Manjaro 15.12 with kernel 4.1, qemu
>> 2.4.1-2, libvirt 1.3.1-2, virt-manager 1.3.2-2
>> qemu xml: http://pastebin.com/WPupqDEv
>>
>> I would be glad to provide you more information, just tell me what you
>> want and how I can get it.
>>
>> I really appreciate any suggestion, I am out of ideas now.
>>
>> Regards,
>> Jens
>>
>>
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>>
>>
>
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