Index: sys/vm/vm_object.c
===================================================================
--- sys/vm/vm_object.c
+++ sys/vm/vm_object.c
@@ -2225,8 +2225,6 @@
 vm_object_set_writeable_dirty(vm_object_t object)
 {
 
-	VM_OBJECT_ASSERT_LOCKED(object);
-
 	/* Only set for vnodes & tmpfs */
 	if (object->type != OBJT_VNODE &&
 	    (object->flags & OBJ_TMPFS_NODE) == 0)
Index: sys/vm/vm_page.c
===================================================================
--- sys/vm/vm_page.c
+++ sys/vm/vm_page.c
@@ -1688,8 +1688,6 @@
 	mnew->pindex = pindex;
 	atomic_set_int(&mnew->ref_count, VPRC_OBJREF);
 	mold = vm_radix_replace(&object->rtree, mnew);
-	KASSERT(mold->queue == PQ_NONE,
-	    ("vm_page_replace: old page %p is on a paging queue", mold));
 
 	/* Keep the resident page list in sorted order. */
 	TAILQ_INSERT_AFTER(&object->memq, mold, mnew, listq);
@@ -3773,7 +3771,7 @@
 
 	KASSERT(m->object != NULL,
 	    ("vm_page_wire: page %p does not belong to an object", m));
-	if (!vm_page_busied(m))
+	if (!vm_page_busied(m) && !vm_object_busied(m->object))
 		VM_OBJECT_ASSERT_LOCKED(m->object);
 	KASSERT((m->flags & PG_FICTITIOUS) == 0 ||
 	    VPRC_WIRE_COUNT(m->ref_count) >= 1,