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From: ron minnich <rminnich@gma...>
Subject: qemu, kvm, xen
Date: Fri, 6 Apr 2007 09:29:07 -0700

On 4/6/07, Eric Van Hensbergen <ericvh@gma...> wrote:

> kvm will catch up as soon as better paravirtualization interfaces are
> integrated (particularly for I/O) -- this is why I wanted to push 9p
> as the KVM paravirtualized I/O interface -- its clear they need to
> close that gap.

I think this is correct. We will keep the THX name however when we
move to kvm, since it's much nicer.

This is a window in time, folks. Anyone who has time to work on
paravirt I/O for kvm that uses 9p could probably get somewhere with
the kvm guys, and avoid the problems of the xen I/O device interface.

I think, overall, given its much simpler setup, kvm is going to win in
the long term. It's in the kernel, it's a piece of cake to set up and
use, you don't need python, xml-rpc, and tons of config files. There
are almost fewer lines of code in kvm than there are files in xen. OK,
so I'm exaggerating, but not by much.

One thing I'm finding is that linux is a very tolerable device driver
layer for Plan 9. This T60, with Plan 9 as a guest OS, is a far better
Plan 9 platform than a T23 with Plan 9 native.

thanks

ron