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 /net/ipv4/tcp_hybla.c | |
| parent | tcp: add tcp_in_slow_start helper (diff) | |
| download | linux-dev-76174004a0f19785a328f40388e87e982bbf69b9.tar.xz linux-dev-76174004a0f19785a328f40388e87e982bbf69b9.zip | |
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 'net/ipv4/tcp_hybla.c')
| -rw-r--r-- | net/ipv4/tcp_hybla.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_hybla.c b/net/ipv4/tcp_hybla.c index f963b274f2b0..083831e359df 100644 --- a/net/ipv4/tcp_hybla.c +++ b/net/ipv4/tcp_hybla.c @@ -112,7 +112,7 @@ static void hybla_cong_avoid(struct sock *sk, u32 ack, u32 acked) rho_fractions = ca->rho_3ls - (ca->rho << 3); - if (tp->snd_cwnd < tp->snd_ssthresh) { + if (tcp_in_slow_start(tp)) { /* * slow start * INC = 2^RHO - 1 |