Re: [Xen-merge] FW: vmware's virtual machine interface

[Andi Kleen <ak@xxxxxxx>]

On Mon, Aug 08, 2005 at 09:03:21PM +0100, Ian Pratt wrote:
>  
> Folks, there's been some disucssion about the VMI interface proposal
> between myself and Linus/Andrew. I've appeneded my latest reply.
> 
> As regards the VMI proposal itself, I don't think I can forward it, so
> if you don't have it you'd better ask Pratap Subrahmanyam
> [pratap@xxxxxxxxxx] for it directly.

FWIW i agree with most of your points.

> [*]Having a single kernel image that works native and on a hypervisor is
> quite convenient from a user POV. We've looked into addressing this
> problem in a different way, by building multiple kernels and then using
> a tool that does a function-by-function 'union' operation, merging the
> duplicates and creating a re-write table that can be used to patch the
> kernel from native to Xen. This approach has no run time overhead, and
> is entirely 'mechanical' rather than having to having to do it as source
> level that can be both tricky and messy.

That sounds incredibly ugly. In particular it will make building
kernels very messy, which is a bad thing.

-Andi

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