linux-kernel - Re: [PATCH V5 0/2] selftests: KVM: Add a test for eager page splitting

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Message-ID: <168565341087.666819.6731422637224460050.b4-ty@google.com>
Date:   Thu,  1 Jun 2023 18:23:32 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Ben Gardon <bgardon@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, Peter Xu <peterx@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Vipin Sharma <vipinsh@...gle.com>,
        Ricardo Koller <ricarkol@...gle.com>
Subject: Re: [PATCH V5 0/2] selftests: KVM: Add a test for eager page splitting

On Tue, 31 Jan 2023 18:18:18 +0000, Ben Gardon wrote:
> David Matlack recently added a feature known as eager page splitting
> to x86 KVM. This feature improves vCPU performance during dirty
> logging because the splitting operation is moved out of the page
> fault path, avoiding EPT/NPT violations or allowing the vCPU threads
> to resolve the violation in the fast path.
> 
> While this feature is a great performance improvement, it does not
> have adequate testing in KVM selftests. Add a test to provide coverage
> of eager page splitting.
> 
> [...]

Applied to kvm-x86 selftests, thanks!

[1/2] selftests: KVM: Move dirty logging functions to memstress.(c|h)
      https://github.com/kvm-x86/linux/commit/de10b798055d
[2/2] selftests: KVM: Add dirty logging page splitting test
      https://github.com/kvm-x86/linux/commit/dfa78a20cc87

--
https://github.com/kvm-x86/linux/tree/next
https://github.com/kvm-x86/linux/tree/fixes