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

[Anthony Liguori <aliguori@xxxxxxxxxx>]

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].
Thanks,

Anthony Liguori
> Two final notes.  This is not an attempt to force a proprietary interface
> into the Linux kernel.  This is an attempt to find a common interface
> that can be used by many hypervisors by isolating hypervisor specific
> idioms into a neutral layer.  This new layer is just what is claims to
> be - a virtual machine interface, which allows hypervisor dependent code
> to be abstracted in a way that benefits both Linux and hypervisor
> development.
>
> This is also not an attempt to define an exact and final specification
> of how virtualization should be done in Linux.  This is very much a work
> in progress, and it is understood that the interfaces proposed here will
> change in time to accommodate the needs of all interested parties.  We 
> hope to find a common solution that can eventually become part of the
> Linux kernel and serve as a model for other operating systems as well.
>
> We appreciate your feedback on this design and the patches to Linux, and
> welcome working with anyone who is interested in making virtualization
> in Linux a friendly environment to innovate in.  If you find the ideas
> here interesting, please volunteer to help improve them.
>   
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>   

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