Re: [fedora-virt] State of KVM paravirtualization

[Dor Laor <dlaor redhat com>]

On 10/22/2009 02:07 PM, Ray Van Dolson wrote:
> On Wed, Oct 21, 2009 at 06:39:01PM -0700, Giovanni Tirloni wrote:
> > Hello,
> >
> >   I'm trying to understand where KVM stands regarding
> > paravirtualization. I've seen the patches from 2007 by Ingo Molnar
> > (http://people.redhat.com/mingo/kvm-paravirt-patches/) but couldn't
> > find anything newer. Are they integrated to the mainstream kernel?
> >
> >   The reason I'm looking at that is because I've a server at home which
> > doesn't have hardware-assisted virtualization support and running qemu
> > in full virtualization mode is a bit slow. I've tried Xen and it sure
> > is fast but I would like to experiment with KVM.
>
> Fortunately, RH will support Xen at least through RHEL 5's EOL.  I'm
> sure the company I work at is not alone in having a lot of older but
> still good hardware around that is great for Xen even if it's not cared
> about by KVM developers so much :)

btw: it's not about care. It's not practical of kvm to implement it. By 
the time it will work, even your Dell will be old... Also hw-assist virt 
with nested paging is a killer, it outperforms any PV by any vendor.

> (I'm thinking Dell PE 2850's, etc.. perfectly good servers that these
> is no reason to toss)
>
> OpenVZ might be a good option for you as well depending on your use
> case.
>
> Ray
>
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