diff options
| author | Yuchung Cheng <ycheng@google.com> | 2015-07-09 13:16:30 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-09 14:22:52 -0700 |
| commit | 76174004a0f19785a328f40388e87e982bbf69b9 (patch) | |
| tree | 113a691ab55819f20b367cdeb8ba86440aa62177 /include/net | |
| parent | 071d5080e33d6f24139e4213c2d9f97a2c21b602 (diff) | |
tcp: do not slow start when cwnd equals ssthresh
In the original design slow start is only used to raise cwnd
when cwnd is stricly below ssthresh. It makes little sense
to slow start when cwnd == ssthresh: especially
when hystart has set ssthresh in the initial ramp, or after
recovery when cwnd resets to ssthresh. Not doing so will
also help reduce the buffer bloat slightly.
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/net')
| -rw-r--r-- | include/net/tcp.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index dba22fc1b065..364426a2be5a 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -991,7 +991,7 @@ static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp) static inline bool tcp_in_slow_start(const struct tcp_sock *tp) { - return tp->snd_cwnd <= tp->snd_ssthresh; + return tp->snd_cwnd < tp->snd_ssthresh; } static inline bool tcp_in_initial_slowstart(const struct tcp_sock *tp) |