xen kernel with dom0 in Fedora 10?

James Ralston qralston+ml.redhat-fedora-devel at andrew.cmu.edu
Fri Oct 3 17:11:11 UTC 2008

On 2008-09-30 at 20:37+01 Richard W.M. Jones <rjones at redhat.com> wrote:

> Yup, KVM is cool, much easier to use, and with virtio-enabled guests
> it's about the same speed as Xen.

I really have to beg to differ about "easier to use", for two reasons:

    1.  Xen's network subsystem bypasses netfilter.

        (One could argue there's a benefit to protecting public
        bridged guests with netfilter, but I think from a philsophical
        viewpoint, public bridged guests really should have unfettered
        network access.)

    2.  Setting up a public bridge is a snap in Xen.  In KVM, it is
        massively complex (i.e., virt-manager can't do it), and
        requires tools (tunctl) Fedora doesn't even provide:


IMHO, KVM's big win is that it doesn't interfere with ACPI functions,
so features like CPU frequency throttling work even if you're running
a KVM guest.

But man oh man, is public bridge networking in KVM a nightmare...

The Bailout Reader - <http://mises.org/story/3128>
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