taglinefilesource code
keepopen640net/inet/af_inet.csk->keepopen = 0;
keepopen186net/inet/sock.csk->keepopen = 1;
keepopen188net/inet/sock.csk->keepopen = 0;
keepopen269net/inet/sock.cval = sk->keepopen;
keepopen85net/inet/sock.hkeepopen,
keepopen1389net/inet/tcp.cif(sk->keepopen) {
keepopen1508net/inet/tcp.cif (sk->keepopen) 
keepopen2964net/inet/tcp.csk->keepopen = 1;
keepopen3171net/inet/tcp.cif (sk->keepopen) 
keepopen3546net/inet/tcp.c} else if (sk->keepopen) {