linux-kernel - Re: [PATCH v3 4/8] KVM: Add a module param to allow enabling virtualization when KVM is loaded

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Message-ID: <df1f371e6faeed88afefd0103d759c02b4acdc12.camel@intel.com>
Date: Fri, 2 Aug 2024 12:06:30 +0000
From: "Huang, Kai" <kai.huang@...el.com>
To: "pbonzini@...hat.com" <pbonzini@...hat.com>, "seanjc@...gle.com"
	<seanjc@...gle.com>
CC: "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Gao, Chao"
	<chao.gao@...el.com>
Subject: Re: [PATCH v3 4/8] KVM: Add a module param to allow enabling
 virtualization when KVM is loaded

On Fri, 2024-08-02 at 12:02 +0000, Huang, Kai wrote:
> This will trigger the above "WARN_ON(kvm_usage_count);" when
> enable_virt_at_load is true, because kvm_uninit_virtualization() isn't
> the last call of kvm_disable_virtualization().

Correct: the WARN_ON() will be triggered regardless of 
enable_virt_at_load is true or false, if kvm_uninit_virtualization()
isn't the last call of kvm_disable_virtualization().