| commit | e97991832a4ea4a5f47d65f068a4c966a2eb5730 | |
| author | Florian Westphal <fw@strlen.de> | |
| Mon, 21 Nov 2016 13:18:38 +0000 (21 14:18 +0100) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Mon, 21 Nov 2016 18:20:17 +0000 (21 13:20 -0500) | ||
| tree | 870e5c09c37890d286872c9ae22382d6bf336b37 | treesnapshot (tar.gz zip) |
| parent | 85f7e7508a1d288b513493196ef406c6c06134e1 | commitdiff |
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>
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>