taglinefilesource code
linger107include/net/sock.hlinger,
linger125net/core/sock.cstruct linger ling;
linger202net/core/sock.csk->linger=0;
linger206net/core/sock.csk->linger=1;
linger222net/core/sock.cstruct linger ling;
linger283net/core/sock.cling.l_onoff=sk->linger;
linger657net/ipv4/af_inet.csk->linger = 0;
linger818net/ipv4/af_inet.cif (sk->linger == 0 || (current->flags & PF_EXITING))
linger2968net/ipv4/tcp.cnewsk->linger=0;