tree 8e49b71e1d0ffc90ce725830b7bb6d2363495b70
parent 8fe7f99a9e11a43183bc27420309ae105e1fec1a
author Yuchung Cheng <ycheng@google.com> 1364121745 +0000
committer David S. Miller <davem@davemloft.net> 1364160448 -0400

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>