taglinefilesource code
new_window533net/ipv4/tcp.cint new_window = sk->prot->rspace(sk);
new_window536net/ipv4/tcp.cnew_window=min(sk->window_clamp,new_window);
new_window550net/ipv4/tcp.cif (new_window < min(sk->mss, MAX_WINDOW/2) || new_window < sk->window)
new_window552net/ipv4/tcp.creturn(new_window);