tcp: fix stretch ACK bugs in CUBIC
authorNeal Cardwell <ncardwell@google.com>
Thu, 29 Jan 2015 01:01:38 +0000 (20:01 -0500)
committerDavid S. Miller <davem@davemloft.net>
Thu, 29 Jan 2015 06:18:38 +0000 (22:18 -0800)
commit9cd981dcf174d26805a032aefa791436da709bee
treed64e5b39bbeecbf80c4a3dc79b9d081d10f71eb8
parentc22bdca94782f05b9337d8548bde51b2f38ef17f
tcp: fix stretch ACK bugs in CUBIC

Change CUBIC to properly handle stretch ACKs in additive increase mode
by passing in the count of ACKed packets to tcp_cong_avoid_ai().

In addition, because we are now precisely accounting for stretch ACKs,
including delayed ACKs, we can now remove the delayed ACK tracking and
estimation code that tracked recent delayed ACK behavior in
ca->delayed_ack.

Reported-by: Eyal Perry <eyalpe@mellanox.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_cubic.c