Re: [PATCH v6 0/7] Enlightened VMCS support for KVM on Hyper-V

From: Radim KrÄmÃÅ
Date: Wed Mar 28 2018 - 16:23:51 EST


2018-03-26 14:42+0200, Vitaly Kuznetsov:
> Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> writes:
>
> > Changes since v5:
> > - Fix a couple of issues reported by kbuild test robot, both in
> > PATCH7 (hope Radim's Reviewed-by: stands).
> >
> > When running nested KVM on Hyper-V it's possible to use so called
> > 'Enlightened VMCS' and do normal memory reads/writes instead of
> > doing VMWRITE/VMREAD instructions. In addition, clean field mask
> > provides a huge room for optimization on L0's side.
> >
> > Tight CPUID loop test shows significant speedup (E5-2667 v4 @ 3.20GHz):
> > Before: 18890 cycles
> > After: 8304 cycles
> >
>
> Paolo, Radim,
>
> with Thomas' ACK on the series:
> https://www.spinics.net/lists/kvm/msg166309.html
>
> is there anything else needed for it to get merged (hoping for 4.17)?

Not from me; I've queued it, thanks.