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Diffstat (limited to 'Documentation/virt/kvm/locking.rst')
| -rw-r--r-- | Documentation/virt/kvm/locking.rst | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/Documentation/virt/kvm/locking.rst b/Documentation/virt/kvm/locking.rst index 3a034db5e5..02880d5552 100644 --- a/Documentation/virt/kvm/locking.rst +++ b/Documentation/virt/kvm/locking.rst @@ -43,10 +43,9 @@ On x86: - vcpu->mutex is taken outside kvm->arch.hyperv.hv_lock and kvm->arch.xen.xen_lock -- kvm->arch.mmu_lock is an rwlock. kvm->arch.tdp_mmu_pages_lock and - kvm->arch.mmu_unsync_pages_lock are taken inside kvm->arch.mmu_lock, and - cannot be taken without already holding kvm->arch.mmu_lock (typically with - ``read_lock`` for the TDP MMU, thus the need for additional spinlocks). +- kvm->arch.mmu_lock is an rwlock; critical sections for + kvm->arch.tdp_mmu_pages_lock and kvm->arch.mmu_unsync_pages_lock must + also take kvm->arch.mmu_lock Everything else is a leaf: no other lock is taken inside the critical sections. |