Re: [PATCH v2 2/9] KVM: Introduce kvm_get_kvm_safe()

[PATCH v2 0/9] KVM: X86: Some light optimizations on rmap logic · Peter Xu <peterx@redhat.com> · 2021-06-25
[PATCH v2 1/9] KVM: X86: Add per-vm stat for max rmap list size · Peter Xu <peterx@redhat.com> · 2021-06-25
[PATCH v2 2/9] KVM: Introduce kvm_get_kvm_safe() · Peter Xu <peterx@redhat.com> · 2021-06-25
Re: [PATCH v2 2/9] KVM: Introduce kvm_get_kvm_safe() · Paolo Bonzini <pbonzini@redhat.com> · 2021-07-26
[PATCH v2 3/9] KVM: Allow to have arch-specific per-vm debugfs files · Peter Xu <peterx@redhat.com> · 2021-06-25
[PATCH v2 4/9] KVM: X86: Introduce pte_list_count() helper · Peter Xu <peterx@redhat.com> · 2021-06-25
[PATCH v2 5/9] KVM: X86: Introduce kvm_mmu_slot_lpages() helpers · Peter Xu <peterx@redhat.com> · 2021-06-25
[PATCH v2 6/9] KVM: X86: Introduce mmu_rmaps_stat per-vm debugfs file · Peter Xu <peterx@redhat.com> · 2021-06-25
[PATCH v2 7/9] KVM: X86: MMU: Tune PTE_LIST_EXT to be bigger · Peter Xu <peterx@redhat.com> · 2021-06-25
Re: [PATCH v2 7/9] KVM: X86: MMU: Tune PTE_LIST_EXT to be bigger · Sean Christopherson <seanjc@google.com> · 2021-07-28
[PATCH v2 8/9] KVM: X86: Optimize pte_list_desc with per-array counter · Peter Xu <peterx@redhat.com> · 2021-06-25
Re: [PATCH v2 8/9] KVM: X86: Optimize pte_list_desc with per-array counter · Sean Christopherson <seanjc@google.com> · 2021-07-28
Re: [PATCH v2 8/9] KVM: X86: Optimize pte_list_desc with per-array counter · Peter Xu <peterx@redhat.com> · 2021-07-28
Re: [PATCH v2 8/9] KVM: X86: Optimize pte_list_desc with per-array counter · Paolo Bonzini <pbonzini@redhat.com> · 2021-07-29
Re: [PATCH v2 8/9] KVM: X86: Optimize pte_list_desc with per-array counter · Peter Xu <peterx@redhat.com> · 2021-07-29
Re: [PATCH v2 8/9] KVM: X86: Optimize pte_list_desc with per-array counter · Peter Xu <peterx@redhat.com> · 2021-07-30
[PATCH v2 9/9] KVM: X86: Optimize zapping rmap · Peter Xu <peterx@redhat.com> · 2021-06-25
Re: [PATCH v2 9/9] KVM: X86: Optimize zapping rmap · Sean Christopherson <seanjc@google.com> · 2021-07-28
Re: [PATCH v2 9/9] KVM: X86: Optimize zapping rmap · Peter Xu <peterx@redhat.com> · 2021-07-28
Re: [PATCH v2 9/9] KVM: X86: Optimize zapping rmap · Sean Christopherson <seanjc@google.com> · 2021-07-28
Re: [PATCH v2 9/9] KVM: X86: Optimize zapping rmap · Paolo Bonzini <pbonzini@redhat.com> · 2021-07-29
Re: [PATCH v2 0/9] KVM: X86: Some light optimizations on rmap logic · Paolo Bonzini <pbonzini@redhat.com> · 2021-07-26

From: Paolo Bonzini <pbonzini@redhat.com>
Date: 2021-07-26 13:43:16
Also in: lkml

On 25/06/21 17:32, Peter Xu wrote:

-	/* The debugfs files are a reference to the kvm struct which
-	 * is still valid when kvm_destroy_vm is called.
-	 * To avoid the race between open and the removal of the debugfs
-	 * directory we test against the users count.
-	 */
-	if (!refcount_inc_not_zero(&stat_data->kvm

Better keep the comment here (but nothing to do on your part).

Paolo

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