[ovirt-users] vms stucked after migrate from 4.1.0 to 4.1.1 host

[Jiří Sléžka]

On 03/28/2017 01:50 PM, Michal Skrivanek wrote:
> 
>> On 28 Mar 2017, at 13:41, Jiří Sléžka <jiri.slezka at slu.cz> wrote:
>>
>> On 03/28/2017 12:34 AM, Jiří Sléžka wrote:
>>> Hi all,
>>>
>>> I have just upgraded ovirt manager from 4.1.0 to 4.1.1, then I have
>>> upgraded one host. After reboot and activation of this host some vms
>>> started to migrate here.
>>>
>>> Some time after migration CPU of this vms go to 100% and vms become
>>> unreachable.
>>>
>>> There is /var/log/libvirt/qemu/hypnos.log (hypnos is one of this vms)
>>> https://pastebin.com/U30xfBMJ
>>>
>>> Powering off and starting again solve this but I would like to have a
>>> glue what is happening.
>>>
>>> I suspect this line
>>>
>>> 2017-03-27T22:09:23.746710Z qemu-kvm: warning: TSC frequency mismatch
>>> between VM (2600031 kHz) and host (2100024 kHz), and TSC scaling unavailable
>>>
>>> Original host uses "AMD Opteron(TM) Processor 6238" with "cpu MHz:
>>> 2600.113" and upgraded host uses "AMD Opteron(tm) Processor 6172" with
>>> "cpu MHz: 2100.097".
>>
>> It looks like it isn't problem with 4.1.1 at all.
>>
>> There is just missing tsc_scale cpu flag on our older AMD CPUs...
>>
>> http://unix.stackexchange.com/questions/296636/100-cpu-utilisation-and-hang-after-virsh-migrate
>>
>> This is probably unsolvable hw problem, right?
> 
> And this is without host-model CPU type?
> That 6172 should be Opteron G3…is that what you have set in your Cluster?

Yes, Cluster CPU type is set to AMD Opteron G3. 6172 should be G3 (we
have 3 of 4 hosts in this cluster with 6172 CPU), 6238 is probably G4
but forced (I hoped) to G3.

Problem occurs only when migrating from 6238 CPU to 6172.

Cheers,

Jiri

> 
> Thanks,
> michal
> 
>>
>> Cheers,
>>
>> Jiri
>>
>>>
>>> Cheers,
>>>
>>> Jiri
>>>
>>>
>>>
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>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>
>>
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> 


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