Fedora 12 doesnt come with Xen and from what I heard RHEL 6 will be based on F12. In the F12 release notes it states that they might port Xen in 2.6.33.<br>"The kernel package in Fedora 12 supports booting as a guest domU, but
will not function as a dom0 until such support is provided upstream.
Work is ongoing and hopes are high that support will be included in
kernel 2.6.33 and Fedora 13."<br>I will start testing kvm+virtio+ovirt for my 5-6 virtual machines to migrate from xen. It seems that its the way to go for future deployments. Xen works fine for me now so I am not in a rush.<br>
<br>I started with xen, moved to xenserver, moved back to xen and I will start testing kvm soon.<br><br>-Adam<br><br><div class="gmail_quote">On Tue, Nov 10, 2009 at 1:52 PM, Scott McClanahan <span dir="ltr"><<a href="mailto:smcclanahan@sigovs.com">smcclanahan@sigovs.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="im"><br>
> Yeah.. Xen paravirtualized mmu is fast, and in some (many) cases beats<br>
> CPU hardware virtualized mmu.<br>
><br>
> KVM has 'pvmmu' aswell, but it's not as good, so KVM is faster with CPU<br>
> hardware virtualization. But that's a problem of KVM only, they haven't<br>
> managed to optimize the pvmmu. And they're going to drop it altogether.<br>
><br>
> KVM people tend to say 'paravirtualized mmu is slow', but they just mean<br>
> KVM implementation of it sucks :)<br>
><br>
> -- Pasi<br>
<br>
</div>I haven't tested or seen any benchmarks but I wonder how much the<br>
addition of a page table for virtualized guests will help. Not to<br>
mention newer features like a virtualized task priority register and<br>
ASID could continue to require less paravirt code in the guest. I get<br>
my two new 5500 series servers in a few weeks so I'm pretty excited to<br>
see some of the second gen hardware virtualization assist features in<br>
action.<br>
<div><div></div><div class="h5"><br>
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