[vfio-users] Guest random short Hang-ups

[Andrei Grigore]

Do you know if this setback would be solved by using LVM instead of a img
file on some Filesystem?

On Oct 13, 2016 13:56, "Jiri 'Ghormoon' Novak" <ghormoon at gmail.com> wrote:

> Hi,
>
> yes, also with SSD it is possible to hang it in my case, though it needs
> quite a lot of workload to happen. also in my case it gets a bit worse than
> on ext4 becuase of the CoW nature of ZFS, but it seems the root cause is
> overloaded IO.
>
> IT would be nice to make the guest wait, not to pause the VM, that would
> make more sense in this case. though it's true it might not be implemented
> ...
>
> Gh.
>
> Andrei Grigore wrote:
>
> This was also my thought. It seems like upon some level of IO activity it
> hangs for a bit. I am using a SSD already.
>
> I am not sure you can do that.
>
> On Oct 13, 2016 11:17, "Ghormoon" <ghormoon at gmail.com> wrote:
>
>> Hi,
>>
>> Shuttering/hangs usually happen to me if IO doesnt manage to cope with
>> the load.
>> When using zfs (zvol) this basically means that I can use this only on
>> ssd drives.
>> Can this be the same case? Any ideas how to make the guest wait for io,
>> not qemu?
>>
>> Regards,
>> Gh.
>>
>> On Oct 13, 2016 11:09, "Andrei Grigore" <andrei.grg at gmail.com> wrote:
>>
>> Hi all,
>>
>> What can cause random guest Hang-ups? I mean totally very short freezes.
>> It can't be the input pheriphrals, since I am using Synergy. Can it be CPU
>> related?
>>
>> I have a FX-8230 with 8 cores and I am using only 6 Cores for the Guest
>> with the following pinning:
>>
>> Core 1 - 2-3
>> Core 2 - 4-5
>> Core 3 - 6-7
>>
>> Tried with both .raw and .qcow2 on ext4 Storage.
>>
>> Thanks,
>> Andrei.
>>
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>>
>>
>
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