diff options
| author | Yuchung Cheng | 2014-05-30 15:25:59 -0700 |
|---|---|---|
| committer | David S. Miller | 2014-06-02 16:50:49 -0700 |
| commit | 0cfa5c07d6d1d7f8e710fc671c5ba1ce85e09fa4 (patch) | |
| tree | a64c77549f5863019d69eb08d25b557ba6a6f5b1 /init | |
| parent | 2d7a85f4b06e9c27ff629f07a524c48074f07f81 (diff) | |
tcp: fix cwnd undo on DSACK in F-RTO
This bug is discovered by an recent F-RTO issue on tcpm list
https://www.ietf.org/mail-archive/web/tcpm/current/msg08794.html
The bug is that currently F-RTO does not use DSACK to undo cwnd in
certain cases: upon receiving an ACK after the RTO retransmission in
F-RTO, and the ACK has DSACK indicating the retransmission is spurious,
the sender only calls tcp_try_undo_loss() if some never retransmisted
data is sacked (FLAG_ORIG_DATA_SACKED).
The correct behavior is to unconditionally call tcp_try_undo_loss so
the DSACK information is used properly to undo the cwnd reduction.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions