linux-kernel - Re: [PATCH v8 00/14] KVM TDX: TDP MMU: large page support

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Date: Tue, 26 Mar 2024 21:15:19 -0700
From: Isaku Yamahata <isaku.yamahata@...el.com>
To: "Yin, Fengwei" <fengwei.yin@...el.com>
Cc: isaku.yamahata@...el.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, isaku.yamahata@...il.com,
	Paolo Bonzini <pbonzini@...hat.com>, erdemaktas@...gle.com,
	Sean Christopherson <seanjc@...gle.com>,
	Sagi Shahar <sagis@...gle.com>, Kai Huang <kai.huang@...el.com>,
	chen.bo@...el.com, hang.yuan@...el.com, tina.zhang@...el.com,
	"Li, Xiaoyao" <xiaoyao.li@...el.com>,
	isaku.yamahata@...ux.intel.com
Subject: Re: [PATCH v8 00/14] KVM TDX: TDP MMU: large page support

On Wed, Mar 27, 2024 at 08:53:50AM +0800,
"Yin, Fengwei" <fengwei.yin@...el.com> wrote:

> Hi Isaku,
> 
> On 2/26/2024 4:29 PM, isaku.yamahata@...el.com wrote:
> > From: Isaku Yamahata <isaku.yamahata@...el.com>
> > 
> > This patch series is based on "v19 KVM TDX: basic feature support".  It
> > implements large page support for TDP MMU by allowing populating of the large
> > page and splitting it when necessary.
> To test the hugepage for TDX guest, we need to apply Qemu patch
> from Xiaoyao:
> https://lore.kernel.org/qemu-devel/20231115071519.2864957-4-xiaoyao.li@intel.com/
> 
> According to Xiaoyao, it's still under discussion. So he didn't
> send updated version patch. For folks want to try this series,
> it may be better to mention above link in this cover letter?

Makes sense.  Let me include it from the next versions.


> Test in my side showed several benchmarks got 10+% performance
> gain which is really nice. So:

So nice.

> Tested-by: Yin Fengwei <fengwei.yin@...el.com>

Thanks,
-- 
Isaku Yamahata <isaku.yamahata@...el.com>