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(parent: 8fe7f99) | patch
tcp: undo spurious timeout after SACK reneging
authorYuchung Cheng <ycheng@google.com>
Sun, 24 Mar 2013 10:42:25 +0000 (10:42 +0000)
committerDavid S. Miller <davem@davemloft.net>
Sun, 24 Mar 2013 21:27:28 +0000 (17:27 -0400)
commit7ebe183c6d444ef5587d803b64a1f4734b18c564
tree8e49b71e1d0ffc90ce725830b7bb6d2363495b70tree | snapshot (tar.gz zip)
parent8fe7f99a9e11a43183bc27420309ae105e1fec1acommit | diff
tcp: undo spurious timeout after SACK reneging

On SACK reneging the sender immediately retransmits and forces a
timeout but disables Eifel (undo). If the (buggy) receiver does not
drop any packet this can trigger a false slow-start retransmit storm
driven by the ACKs of the original packets. This can be detected with
undo and TCP timestamps.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_input.c diff | blob | blame | history