Re: [Xen-users] Problems migrating DomUs in 4.4

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Wed, Nov 11, 2015 at 8:26 AM, Agustin Lopez <Agustin.Lopez@xxxxx> wrote:
>
> Answer to myself.
>
> Ok, I think of the problem arise when I create a domU in a dom0 with NUMA
> architecture and migrate to non NUMA dom0.
> Any pointer to resolve it?
>
> Thanks,
> Agustin
>
>
> El 04/11/2015 a las 16:31, Agustin Lopez escribiÃ:
>>
>>
>> Hello!
>>
>> I am testing Xen 4.4 and xl with Debian Jessie systems.
>>
>> In 4.1, I could migrate domus between dom0 without problems (pv and hvm).
>> Now, with 4.4, the migrating process with xl it is frustrating.
>>
>> First, I got the next error:
>>    xc: error: Couldn't set eXtended States for vcpu0 (22 = Invalid
>> argument): Internal error
>> After read some docs, I had set in the domu cfg the next:
>>    cpuid = 'host,xsave=0'
>>
>> With this, the domu appears that is migrated. But in the next dom0, the
>> domu get kernel errors and do not work:
>> [   48.786638] xen:grant_table: Grant tables using version 1 layout
>> [   48.786638] Using NULL legacy PIC
>> [   48.786614] PM: noirq restore of devices complete after 0.118 msecs
>> [   48.786614] PM: early restore of devices complete after 0.052 msecs
>> [   48.794780] invalid opcode: 0000 [#1] SMP
>> [   48.794790] Modules linked in: xfs libcrc32c xen_netfront xen_blkfront
>> crct10dif_pclmul crct10dif_common crc32c_intel
>> [   48.794808] CPU: 1 PID: 2236 Comm: kworker/1:2 Not tainted 3.16-3-amd64
>> #1 Debian 3.16.5-1
>> [   48.794823] Workqueue: events linkwatch_event
>> ................
>>
>> In both directions, in that hardware, the live migrating  process was Ok.
>> Now, I can not get work.
>>
>> Any pointer, please.
>>
>>
>> PS: the hardware for two dom0s is:
>>
>> processor       : 0
>> vendor_id       : GenuineIntel
>> cpu family      : 6
>> model           : 23
>> model name      : Intel(R) Xeon(R) CPU           E5405  @ 2.00GHz
>> ...
>>
>> processor       : 0
>> vendor_id       : GenuineIntel
>> cpu family      : 6
>> model           : 62
>> model name      : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz
>> ....
>>
>>
>> Regards,
>> AgustÃn

I know that in the past we were a lot less picky about making sure
cpus were compatible.  Andy, you've been doing stuff related to cpu
levelling -- any insight / adivce here?

 -George

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