From: "Radim Krčmář" <rkrcmar@redhat.com>
To: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
x86@kernel.org, kvm@vger.kernel.org,
"K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
"Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com>,
Mohammed Gamal <mmorsy@redhat.com>,
Cathy Avery <cavery@redhat.com>, Bandan Das <bsd@redhat.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH v6 0/7] Enlightened VMCS support for KVM on Hyper-V
Date: Wed, 28 Mar 2018 22:23:38 +0200 [thread overview]
Message-ID: <20180328202338.GH26753@flask> (raw)
In-Reply-To: <87muyv2ek9.fsf@vitty.brq.redhat.com>
2018-03-26 14:42+0200, Vitaly Kuznetsov:
> Vitaly Kuznetsov <vkuznets@redhat.com> 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.
prev parent reply other threads:[~2018-03-28 20:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-20 14:02 [PATCH v6 0/7] Enlightened VMCS support for KVM on Hyper-V Vitaly Kuznetsov
2018-03-20 14:02 ` [PATCH v6 1/7] x86/hyper-v: move hyperv.h out of uapi Vitaly Kuznetsov
2018-03-20 14:02 ` [PATCH v6 2/7] x86/hyper-v: move definitions from TLFS to hyperv-tlfs.h Vitaly Kuznetsov
2018-03-20 14:02 ` [PATCH v6 3/7] x86/kvm: rename HV_X64_MSR_APIC_ASSIST_PAGE to HV_X64_MSR_VP_ASSIST_PAGE Vitaly Kuznetsov
2018-03-20 14:02 ` [PATCH v6 4/7] x86/hyper-v: allocate and use Virtual Processor Assist Pages Vitaly Kuznetsov
2018-03-20 14:02 ` [PATCH v6 5/7] x86/hyper-v: define struct hv_enlightened_vmcs and clean field bits Vitaly Kuznetsov
2018-03-20 14:02 ` [PATCH v6 6/7] x86/hyper-v: detect nested features Vitaly Kuznetsov
2018-03-20 14:02 ` [PATCH v6 7/7] x86/kvm: use Enlightened VMCS when running on Hyper-V Vitaly Kuznetsov
2018-03-26 12:42 ` [PATCH v6 0/7] Enlightened VMCS support for KVM " Vitaly Kuznetsov
2018-03-28 20:23 ` Radim Krčmář [this message]
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