diff options
| author |   Florian Westphal <fw@strlen.de> | 2016-11-21 14:18:38 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-11-21 13:20:17 -0500 |
| commit | e97991832a4ea4a5f47d65f068a4c966a2eb5730 (patch) | |
| tree | 870e5c09c37890d286872c9ae22382d6bf336b37 /include | |
| parent | tcp: add cwnd_undo functions to various tcp cc algorithms (diff) | |
| download | linux-dev-e97991832a4ea4a5f47d65f068a4c966a2eb5730.tar.xz linux-dev-e97991832a4ea4a5f47d65f068a4c966a2eb5730.zip | |
tcp: make undo_cwnd mandatory for congestion modules
The undo_cwnd fallback in the stack doubles cwnd based on ssthresh,
which un-does reno halving behaviour.
It seems more appropriate to let congctl algorithms pair .ssthresh
and .undo_cwnd properly. Add a 'tcp_reno_undo_cwnd' function and wire it
up for all congestion algorithms that used to rely on the fallback.
Cc: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/tcp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 123979fe12bf..7de80739adab 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -958,6 +958,7 @@ u32 tcp_slow_start(struct tcp_sock *tp, u32 acked); void tcp_cong_avoid_ai(struct tcp_sock *tp, u32 w, u32 acked); u32 tcp_reno_ssthresh(struct sock *sk); +u32 tcp_reno_undo_cwnd(struct sock *sk); void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 acked); extern struct tcp_congestion_ops tcp_reno; |