Re: [Qemu-devel] About qemu emulation speed (a question) and supported OS

[Mark Williamson]

> > There are a couple of interesting paravirtualization techniques too.
> > There's the Xen approach (really fast, but very invasive), the L4ka
> > afterburning (theoritically close to as fast, but less invasive), and
> > then of course the extremes like UML.
>
> Not familar with L4ka. I don't believe that UML does virtualization, it
> simply runs linux code 'as is' but intercepts calls to the kernel.

I don't want to put words in Anthony's mouth but I usually see UML as a rather 
(very) extreme case of paravirtualisation that barely preserves the 
underlying architecture's characteristics; I'm guessing that's what he 
meant...

Cheers,
Mark