[Xen-devel] Re: [RFC, PATCH 0/24] VMI i386 Linux virtualization interface proposal

[Zachary Amsden <zach@xxxxxxxxxx>]

Anthony Liguori wrote:
> Zachary Amsden wrote:
> > This is by no means finished work. A few of the areas that need more
> > attention and exploration are (a) 64bit support is still lacking, but we
> > feel a port of VMI to the 64 bit Linux can be done without too much
> > trouble (b) the Xen compatibility layer needs some work to bring it
> > up to the Xen 3.0 interfaces.  Work is underway on this already, and
> > no major issues are expected at this time.   
> Hi Zach,
>
> Can you please post the Xen compatibility layer (even if it is for 
> 2.0.x).  I think it's important to see that code to understand the 
> advantages/disadvantages compared to the existing Xen 
> paravirtualization interface.  Likewise, any Xen performance data 
> would be useful as there has been some discussion about whether VMI 
> would negatively impact Xen performance[1].
About performance - I actually believe that it is possible to implement 
VMI Linux in such a way that it actually has _better_ performance on Xen 
than the current XenoLinux kernels.
I'm working on getting together the older interface pieces now.

Zach

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