Re: [announce] [patch] KVM paravirtualization for Linux

Pavel Machek
2007-01-07T00:31:58Z

Hi!

> i'm pleased to announce the first release of paravirtualized KVM (Linux
> under Linux), which includes support for the hardware cr3-cache feature
> of Intel-VMX CPUs. (which speeds up context switches and TLB flushes)
>
> the patch is against 2.6.20-rc3 + KVM trunk and can be found at:
>
> http://redhat.com/~mingo/kvm-paravirt-patches/
>
> Some aspects of the code are still a bit ad-hoc and incomplete, but the
> code is stable enough in my testing and i'd like to have some feedback.
>
> Firstly, here are some numbers:
>
> 2-task context-switch performance (in microseconds, lower is better):
>
> native: 1.11
> ----------------------------------
> Qemu: 61.18
> KVM upstream: 53.01
> KVM trunk: 6.36
> KVM trunk+paravirt/cr3: 1.60

Does this make Xen obsolete? I mean... we have xen patches in suse
kernels, should we keep updating them, or just drop them in favour of
KVM?
Pavel
--
Thanks for all the (sleeping) penguins.