Re: [Xen-users] Re: Xen-users Digest, Vol 11, Issue 53

[Goetz Bock <bock@xxxxxxxxxxx>]

On Mon, Jan 09 '06 at 12:57, Jean-Eric Cuendet wrote:
> 
> > The Hypervisor runes above (or below) the kernel (debending on how you
> > view the layers in the whole sytem). But to work the Xen-Kernel NEEDS
> > services the hypervisor provides. Without a hypervisor the xen-kernel
> > will not boot.
> 
> Do you mean xend? 
No
> Or the in-kernel hypervisor?
There is no in-kernel hypervisor. As I said the hypervisor runs above
the kernel. It's completely seperated from the kernel. Actually there
are 3.5 completely different "kernels" that can be run using the Xen
hypervisor: linux 2.4, linux 2.6, freeBSD, openSolaris. With Xen3 only
linux 2.6 is useable right now, but the rest is forthcomming.

> In either case, will it impact the performance if it is not used? (No 
> active virtual machines, only a dom0 kernel)
Just test it with your workload. For me it's measureable, but
irrelevant. I'm using xen because I want the features and if I don't
need the features than I stick with my distributions stock kernel.
-- 
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