linux-kernel - Re: [PATCH 0/2] KVM: x86: kvm_has_noapic

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Message-ID: <170864806790.3089707.15358518741225122287.b4-ty@google.com>
Date: Thu, 22 Feb 2024 17:35:40 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Li RongQing <lirongqing@...du.com>, Maxim Levitsky <mlevitsk@...hat.com>
Subject: Re: [PATCH 0/2] KVM: x86: kvm_has_noapic_vcpu fix/cleanup

On Fri, 09 Feb 2024 14:20:45 -0800, Sean Christopherson wrote:
> Fix a longstanding bug where KVM fails to decrement kvm_has_noapic_vcpu
> if vCPU creation ultimately fails.  This is obviously way more than just
> a fix, but (a) in all likelihood no real users are affected by this, (b)
> the absolutely worst case scenario is minor performance degredation, and
> (c) I'm not at all convinced that kvm_has_noapic_vcpu provides any
> performance benefits.
> 
> [...]

Applied to kvm-x86 misc, thanks!

[1/2] KVM: x86: Move "KVM no-APIC vCPU" key management into local APIC code
      https://github.com/kvm-x86/linux/commit/a78d9046696b
[2/2] KVM: x86: Sanity check that kvm_has_noapic_vcpu is zero at module_exit()
      https://github.com/kvm-x86/linux/commit/fc3c94142b3a

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