[vfio-users] Win10 Guest, stability is horrible and freeze quickly

Berillions berillions at gmail.com
Sat Oct 8 13:16:57 UTC 2016

I don't understand what could eats the RAM of the host because i have 32GB
Memory RAM. I have 16GB for the Host and 16GB (with Hugepages) for the
Guest. My Windows_10.img is in an Ext2 partition.

I try actually to use the IGD (Intel graphic card) to the Host and the
GTX970 to the Guest and i have no problems. How is it possible to have
conflict between both Nvidia card.
I have only two solutions :

1- Use both Nvidia cards but only 2GB Memory RAM in virt-manager and i
don't know if with 10GB of Memory swap in Win10 is enough to play at AAA

2- Use IGD for Linux and the Nvidia for the Host.

2016-10-08 14:36 GMT+02:00 Bronek Kozicki <brok at spamcop.net>:

> Perhaps you have something eating into RAM of the host. I had my host
> freezing when I forgot to limit memory utilization in the ZFS. It does not
> matter what eats into your host RAM - since qemu is just a regular
> userspace process, it's memory needs (ie those of the guest system) are not
> "prioritized" as more essential than any other userspace process. If your
> host does not have enough memory, then the more you allocate in qemu (or
> libvirt) to the guest system, the more probability that qemu will run out
> of RAM, effectively freezing the guest OS. At least, this is what it would
> appear to be (it might be simply swapping, but that slows down guest
> execution speed by orders of magnitude, so it is effectively frozen)
> B.
> *From: *Berillions
> *Sent: *Friday, 7 October 2016 20:00
> *To: *Jayme Howard
> *Cc: *martin at schrodt.org; vfio-users
> *Subject: *Re: [vfio-users] Win10 Guest, stability is horrible and freeze
> quickly
> Very very very things. If i set more than 2GB Memory Ram in Virt-Manager
> for the Guest, i have artefacts and freeze. If I set 2GB like actually, the
> guest works perfectly.
> So i don't know if it will be good for gaming even if i set Windows swap
> to 10GB ...
> 2016-10-07 19:43 GMT+02:00 Jayme Howard <g.prime at gmail.com>:
>> Put the 960 into the one that goes 4x if you're that worried about it,
>> but it shouldn't be a huge deal.  I don't know if the 960 can even saturate
>> a 4x.  It might be able to, but since it's a lower performance card anyway,
>> it shouldn't really matter.
>> On Fri, Oct 7, 2016 at 12:36 PM, Berillions <berillions at gmail.com> wrote:
>>> I have two PCI-E 3.0 16x slot,
>>> The first with the 960 and the second for the 970. if the second slot is
>>> used, his bandwidth will not be 16x but 4x.
>>> The others slots are only PCI-E 3.0 1x ...
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