linux-kernel - Re: [PATCH v4 1/2] KVM: X86: Less kvmclock sync induced vmexits after VM boots

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Message-ID: <8804030e-db83-d212-d712-807833f9fd7e@redhat.com>
Date:   Tue, 18 Feb 2020 17:31:03 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <kernellwp@...il.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH v4 1/2] KVM: X86: Less kvmclock sync induced vmexits after
 VM boots

On 18/02/20 17:29, Vitaly Kuznetsov wrote:
>> No, it executes after 5 minutes.  I agree that the patch shouldn't be
>> really necessary, though you do save on cacheline bouncing due to
>> test_and_set_bit.
> 
> True, but the changelog should probably be updated then.

Yes, I agree.

Paolo