[PVE-User] Windows 2003 crash with PVE 2.1

lst_hoe02 at kwsoft.de lst_hoe02 at kwsoft.de
Wed May 16 10:41:04 CEST 2012

Zitat von 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.

Another test showed that on a Intel machine where the 2003 server runs  
fine when executing without KVM it also crashes if PVE 2.1 is  
installed and the OS should run inside a KVM container. So it *is* a  
problem with the KVM virtualization doing something really disliked by  
windows 2003 and not a problem hardware <--> guest OS :-(
Any idea how to debug this or if there is a workaround?



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