linux-kernel - Re: [PATCH v3 2/6] KVM: x86/mmu: Track the number of TDP MMU pages, but not the actual pages

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Message-ID: <YkcKqAqcKUAS+b7+@google.com>
Date:   Fri, 1 Apr 2022 14:22:32 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Mingwei Zhang <mizhang@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        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, Yosry Ahmed <yosryahmed@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        Peter Xu <peterx@...hat.com>
Subject: Re: [PATCH v3 2/6] KVM: x86/mmu: Track the number of TDP MMU pages,
 but not the actual pages

On Fri, Apr 01, 2022, Mingwei Zhang wrote:
> diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
> index f05423545e6d..5ca78a89d8ed 100644
> --- a/arch/x86/kvm/mmu/tdp_mmu.c
> +++ b/arch/x86/kvm/mmu/tdp_mmu.c
> @@ -24,7 +24,6 @@ bool kvm_mmu_init_tdp_mmu(struct kvm *kvm)
>  
>  	INIT_LIST_HEAD(&kvm->arch.tdp_mmu_roots);
>  	spin_lock_init(&kvm->arch.tdp_mmu_pages_lock);
> -	INIT_LIST_HEAD(&kvm->arch.tdp_mmu_pages);
>  	kvm->arch.tdp_mmu_zap_wq =
>  		alloc_workqueue("kvm", WQ_UNBOUND|WQ_MEM_RECLAIM|WQ_CPU_INTENSIVE, 0);

This has a minor conflict with kvm/next and kvm/queue, attached a new version since
you'll need a v3 (foreshadowing...).

View attachment "0001-KVM-x86-mmu-Track-the-number-of-TDP-MMU-pages-but-no.patch" of type "text/x-diff" (4421 bytes)