On 11/19/21 14:47, Chao Peng wrote:
+ + /* Prevent memslot modification */ + spin_lock(&kvm->mn_invalidate_lock); + kvm->mn_active_invalidate_count++; + spin_unlock(&kvm->mn_invalidate_lock); + + ret = __kvm_handle_useraddr_range(kvm, &useraddr_range); + + spin_lock(&kvm->mn_invalidate_lock); + kvm->mn_active_invalidate_count--; + spin_unlock(&kvm->mn_invalidate_lock); +
You need to follow this with a rcuwait_wake_up as in kvm_mmu_notifier_invalidate_range_end.
It's probably best if you move the manipulations of mn_active_invalidate_count from kvm_mmu_notifier_invalidate_range_* to two separate functions.
Paolo
