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RE: [Xen-devel] is the xen toolstack backwards compatible ?



On a separate thread, I've observed that the toolstack
incompatibility seems to appear between c/s 20070 and
20072.  I don't think backwards compatibility is
guaranteed but I agree it is desirable when possible.

> -----Original Message-----
> From: Sander Eikelenboom [mailto:linux@xxxxxxxxxxxxxx]
> Sent: Tuesday, December 08, 2009 5:23 PM
> To: Keir Fraser
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] is the xen toolstack backwards compatible ?
> 
> 
> Hello Keir,
> 
> Perhaps it was coincidence, but if i remember well, booting a 
> 3.4.* hypervisor with the toolstack from a newer xen version 
> (aka xen-unstable) seemed to work.
> The thing is, default a xen build installs the different 
> hypervisor versions beside each other, and you can use them 
> as such in your grub config, the same with kernels.
> But the toolstack (xend, xm, xentop etc.) gets overwritten. 
> So after trying out a new hypervisor, you have to reinstall 
> your old toolstack before booting in a older hypervisor.
> 
> So if it was no coincidence but desirable, at the moment xend 
> and xentop from unstable don't seem to work on 3.4.2 
> hypervisor anymore.
> 
> -- 
> Best regards,
>  Sander                          mailto:linux@xxxxxxxxxxxxxx
> 
> 
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