diff options
| author | Yuchung Cheng <ycheng@google.com> | 2015-07-09 13:16:29 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-09 14:22:52 -0700 |
| commit | 071d5080e33d6f24139e4213c2d9f97a2c21b602 (patch) | |
| tree | 2dad35b407a5aef707769358a0cc61c43abf33fa /include | |
| parent | 1007f59dce53a22cba164f854d7bdc171c85dc79 (diff) | |
tcp: add tcp_in_slow_start helper
Add a helper to test the slow start condition in various congestion
control modules and other places. This is to prepare a slight improvement
in policy as to exactly when to slow start.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Nandita Dukkipati <nanditad@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/tcp.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 950cfecaad3c..dba22fc1b065 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -989,6 +989,11 @@ static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp) #define TCP_INFINITE_SSTHRESH 0x7fffffff +static inline bool tcp_in_slow_start(const struct tcp_sock *tp) +{ + return tp->snd_cwnd <= tp->snd_ssthresh; +} + static inline bool tcp_in_initial_slowstart(const struct tcp_sock *tp) { return tp->snd_ssthresh >= TCP_INFINITE_SSTHRESH; @@ -1065,7 +1070,7 @@ static inline bool tcp_is_cwnd_limited(const struct sock *sk) const struct tcp_sock *tp = tcp_sk(sk); /* If in slow start, ensure cwnd grows to twice what was ACKed. */ - if (tp->snd_cwnd <= tp->snd_ssthresh) + if (tcp_in_slow_start(tp)) return tp->snd_cwnd < 2 * tp->max_packets_out; return tp->is_cwnd_limited; |