[6/8] KVM: simply wakup async pf

Commit Message

Xiao Guangrong Oct. 27, 2010, 9:07 a.m. UTC

None

Patch

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 0c1b7c5..d91add9 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -131,6 +131,7 @@  struct kvm_vcpu {
 		struct list_head queue;
 		struct list_head done;
 		spinlock_t lock;
+		bool wakeup;
 	} async_pf;
 #endif
 
diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c
index 5307a32..0d1f6c4 100644
--- a/virt/kvm/async_pf.c
+++ b/virt/kvm/async_pf.c
@@ -124,6 +124,11 @@  bool kvm_check_async_pf_completion(struct kvm_vcpu *vcpu)
 {
 	struct kvm_async_pf *work;
 
+	if (vcpu->async_pf.wakeup) {
+		vcpu->async_pf.wakeup = false;
+		return true;
+	}
+
 	if (list_empty_careful(&vcpu->async_pf.done) ||
 	    !kvm_arch_can_inject_async_page_present(vcpu))
 		return false;
@@ -197,20 +202,6 @@  retry_sync:
 
 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu)
 {
-	struct kvm_async_pf *work;
-
-	if (!list_empty(&vcpu->async_pf.done))
-		return 0;
-
-	work = kmem_cache_zalloc(async_pf_cache, GFP_ATOMIC);
-	if (!work)
-		return -ENOMEM;
-
-	work->page = bad_page;
-	get_page(bad_page);
-	INIT_LIST_HEAD(&work->queue); /* for list_del to work */
-
-	list_add_tail(&work->link, &vcpu->async_pf.done);
-	vcpu->async_pf.queued++;
+	vcpu->async_pf.wakeup = true;
 	return 0;
 }