[PVE-User] Windows 2003 crash with PVE 2.1

[lst_hoe02 at kwsoft.de]

Zitat von Alain Péan <alain.pean at lpp.polytechnique.fr>:

> Le 15/05/2012 16:37, Alain Péan a écrit :
>> Le 15/05/2012 10:25, lst_hoe02 at kwsoft.de a écrit :
>>>
>>> Zitat von Alain Péan <alain.pean at lpp.polytechnique.fr>:
>>>
>>>> Le 15/05/2012 10:03, lst_hoe02 at kwsoft.de a écrit :
>>>>> Hm, now tested on a second PVE 2.1 box with AMD Processor and it works...
>>>>> Any idea what is going wrong or is this even supported?
>>>>
>>>> On 1.9, was it also an AMD processor ?
>>>
>>> Yes, but to my knowledge it should be possible to move W2K3 from  
>>> AMD to Intel or vice-versa. I have also double checked that no AMD  
>>> specific software is installed and in fact beside IIS nearly  
>>> nothing is installed on this box.
>>>
>>
>> Hi Andreas,
>>
>> I just verified, I remembered there were problems to migrate  
>> between Intel and AMD CPU, and this seems indeed the case. See for  
>> example :
>> http://serverfault.com/questions/226547/kvm-live-migration-between-intel-and-amd-processors So, I fear you can only install your VM on an AMD based server, or you have to migrate again your physical server to an Intel CPU based  
>> server...
>>
>
> I did further researchs, and the situation is a bit more complicated  
> than I thought. The KVM FAQ explicitly says it is possible to  
> migrate between AMD and Intel :
> http://www.linux-kvm.org/page/FAQ#Does_KVM_support_live_migration_from_an_AMD_host_to_an_Intel_host_and_back.3F
>
> But, the RHEL documentation says it is not possible :
> http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Host_Configuration_and_Guest_Installation_Guide/chap-Virtualization_Host_Configuration_and_Guest_Installation_Guide-Virtualization_Restrictions.html

 From my point of view this is a problem when doing a "live" migration  
or move between Intel/AMD which is not easily possible. But doing a  
"cold" image based migration should be possible if the guest OS is  
able to boot on either CPU, no??

Strange thing is that i tested to restore the image on bare intel base  
hardware and it works as expected at least with a older Core2. A image  
created from this Intel machine does also crash like described inside  
PVE 2.1, so it must be some special case for newer i3/5-2000 hardware  
or a problem with newer KVM versions.

> As Proxmox uses a RHEL kernel patched for OpenVZ, it is perhaps not  
> possible with this kernel...

Would be really strange if cold migration is not possible. That's one  
of the benefits of virtualization to unbound the OS from the hardware  
used.

Regards

Andreas