Index: sys/kern/vfs_subr.c
===================================================================
--- sys/kern/vfs_subr.c
+++ sys/kern/vfs_subr.c
@@ -3055,7 +3055,8 @@
 	 * pending I/O and dirty pages in the object.
 	 */
 	obj = vp->v_object;
-	if (obj != NULL && (obj->flags & OBJ_MIGHTBEDIRTY) != 0) {
+	if ((vp->v_vflag & VV_NOSYNC) == 0 && obj != NULL &&
+	    (obj->flags & OBJ_MIGHTBEDIRTY) != 0) {
 		VM_OBJECT_WLOCK(obj);
 		vm_object_page_clean(obj, 0, 0, 0);
 		VM_OBJECT_WUNLOCK(obj);
Index: sys/vm/vm_object.c
===================================================================
--- sys/vm/vm_object.c
+++ sys/vm/vm_object.c
@@ -1083,8 +1068,8 @@
 	 * I/O.
 	 */
 	if (object->type == OBJT_VNODE &&
-	    (object->flags & OBJ_MIGHTBEDIRTY) != 0) {
-		vp = object->handle;
+	    (object->flags & OBJ_MIGHTBEDIRTY) != 0 &&
+	    ((vp = object->handle)->v_vflag & VV_NOSYNC) == 0) {
 		VM_OBJECT_WUNLOCK(object);
 		(void) vn_start_write(vp, &mp, V_WAIT);
 		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);