OBJ_POPULATE
vm_object_set_flag(object, OBJ_POPULATE);
vm_object_set_flag(object, OBJ_POPULATE);
vm_object_set_flag(object, OBJ_POPULATE);
(fs->first_object->flags & OBJ_POPULATE) != 0 &&
MPASS((object->flags & OBJ_POPULATE) != 0);