public synchronized void insert(DiskEntry v) {
      assert v.getPrev() == null;
      // checkForDuplicate(v);
      DiskEntry n = getNext();
      setNext(v);
      n.setPrev(v);
      v.setNext(n);
      v.setPrev(this);
    }
Clear without an RVV. Empties the entire list.
geode-core/src/main/java/org/apache/geode/internal/cache/Oplog.java