taglinefilesource code
exp_growth791net/inet/sock.csk->exp_growth = 1;  /* if set cong_window grow exponentially every time
exp_growth76net/inet/sock.hexp_growth,
exp_growth179net/inet/tcp.csk->exp_growth = 0;
exp_growth2248net/inet/tcp.cif (sk->exp_growth) sk->cong_window *= 2;
exp_growth2385net/inet/tcp.csk->exp_growth = 0;