taglinefilesource code
new_window535net/ipv4/tcp.cint new_window = sock_rspace(sk);
new_window538net/ipv4/tcp.cnew_window=min(sk->window_clamp,new_window);
new_window552net/ipv4/tcp.cif (new_window < min(sk->mss, MAX_WINDOW/2) || new_window < sk->window)
new_window554net/ipv4/tcp.creturn(new_window);