  static ghobject_t make_pg_biginfo_oid(spg_t pg) {
    stringstream ss;
    ss << "pginfo_" << pg;
    string s;
    getline(ss, s);
    return ghobject_t(hobject_t(sobject_t(object_t(s.c_str()), 0)));
  }
  static ghobject_t make_pg_biginfo_oid(spg_t pg) {
    stringstream ss;
    ss << "pginfo_" << pg;
    string s;
    getline(ss, s);
    return ghobject_t(hobject_t(sobject_t(object_t(s.c_str()), 0)));
  }