linux-kernel - Re: [PATCH v2] KVM: X86: Ultra fast single target IPI fastpath

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Message-ID: <a7530d71-dd57-5a22-ee34-da65caa3eea8@redhat.com>
Date:   Fri, 10 Apr 2020 20:43:53 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Haiwei Li <lihaiwei@...cent.com>
Subject: Re: [PATCH v2] KVM: X86: Ultra fast single target IPI fastpath

On 10/04/20 19:47, Sean Christopherson wrote:
> If that's open-coded in vmx_vcpu_run(), I'm ok with doing the
> fast-IPI handler immediately after the failure checks.
> 
> And fast-IPI aside, the code could use a bit of optimization to
> prioritize successful VM-Enter, which would slot in nicely as a prep
> patch.

Yes, I agree with these.

Paolo