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| author |   Neal Cardwell <ncardwell@google.com> | 2021-07-27 10:42:58 -0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-07-27 20:07:21 +0100 |
| commit | a657db0350bb8f568897835b6189c84a89f13292 (patch) | |
| tree | 40699aa991aa192060e472048665088a7029bfd1 /net/core/dev_ioctl.c | |
| parent | tcp: more accurately detect spurious TLP probes (diff) | |
| download | wireguard-linux-a657db0350bb8f568897835b6189c84a89f13292.tar.xz wireguard-linux-a657db0350bb8f568897835b6189c84a89f13292.zip | |
tcp: more accurately check DSACKs to grow RACK reordering window
Previously, a DSACK could expand the RACK reordering window when no
reordering has been seen, and/or when the DSACK was due to an
unnecessary TLP retransmit (rather than a spurious fast recovery due
to reordering). This could result in unnecessarily growing the RACK
reordering window and thus unnecessarily delaying RACK-based fast
recovery episodes.
To avoid these issues, this commit tightens the conditions under which
a DSACK triggers the RACK reordering window to grow, so that a
connection only expands its RACK reordering window if:
(a) reordering has been seen in the connection
(b) a DSACKed range does not match the most recent TLP retransmit
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Priyaranjan Jha <priyarjha@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dev_ioctl.c')
0 files changed, 0 insertions, 0 deletions