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| author | Yuchung Cheng <ycheng@google.com> | 2017-08-04 05:38:51 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-07 06:25:10 +0200 |
| commit | 4faf783998b8cb88294e9df89032f473f8771b78 (patch) | |
| tree | 0ad450f18cbf6c23f23e9f181a4d4ee5c6a99b7a /net/ipv4/tcp_illinois.c | |
| parent | net: systemport: Support 64bit statistics (diff) | |
| download | linux-4faf783998b8cb88294e9df89032f473f8771b78.tar.xz linux-4faf783998b8cb88294e9df89032f473f8771b78.zip | |
tcp: fix cwnd undo in Reno and HTCP congestion controls
Using ssthresh to revert cwnd is less reliable when ssthresh is
bounded to 2 packets. This patch uses an existing variable in TCP
"prior_cwnd" that snapshots the cwnd right before entering fast
recovery and RTO recovery in Reno. This fixes the issue discussed
in netdev thread: "A buggy behavior for Linux TCP Reno and HTCP"
https://www.spinics.net/lists/netdev/msg444955.html
Suggested-by: Neal Cardwell <ncardwell@google.com>
Reported-by: Wei Sun <unlcsewsun@gmail.com>
Signed-off-by: Yuchung Cheng <ncardwell@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_illinois.c')
0 files changed, 0 insertions, 0 deletions