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From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: "Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>
Cc: 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: Mon, 26 Mar 2018 14:42:46 +0200	[thread overview]
Message-ID: <87muyv2ek9.fsf@vitty.brq.redhat.com> (raw)
In-Reply-To: <20180320140211.7600-1-vkuznets@redhat.com> (Vitaly Kuznetsov's message of "Tue, 20 Mar 2018 15:02:04 +0100")

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)?

Thanks,

-- 
  Vitaly

  parent reply	other threads:[~2018-03-26 12:42 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-20 14:02 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 ` Vitaly Kuznetsov [this message]
2018-03-28 20:23   ` [PATCH v6 0/7] Enlightened VMCS support for KVM " Radim Krčmář

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