[v4,07/12] Maintain memslot version number

Commit Message

Gleb Natapov July 6, 2010, 4:24 p.m. UTC

None

Patch

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index e796326..64f62f1 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -177,6 +177,7 @@  struct kvm {
 	raw_spinlock_t requests_lock;
 	struct mutex slots_lock;
 	struct mm_struct *mm; /* userspace tied to this vm */
+	u32 memslot_version;
 	struct kvm_memslots *memslots;
 	struct srcu_struct srcu;
 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a60b6b0..733558c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -730,6 +730,7 @@  skip_lpage:
 	slots->memslots[mem->slot] = new;
 	old_memslots = kvm->memslots;
 	rcu_assign_pointer(kvm->memslots, slots);
+	kvm->memslot_version++;
 	synchronize_srcu_expedited(&kvm->srcu);
 
 	kvm_arch_commit_memory_region(kvm, mem, old, user_alloc);