| author | Yuchung Cheng <ycheng@google.com> | |
| Sun, 24 Mar 2013 10:42:25 +0000 (10:42 +0000) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Fri, 5 Apr 2013 16:26:17 +0000 (09:26 -0700) | ||
| commit | 08fdc3f632fd9d5a273241d0a7729fded63dfeec | |
| tree | 38cc86e41d5bde6ff188c9653771f9a49070a01e | tree | snapshot (tar.xz tar.gz zip) |
| parent | a1aee1b37f9fd8c622e0d127daa079293c33be9b | commit | diff |
tcp: undo spurious timeout after SACK reneging
[ Upstream commit 7ebe183c6d444ef5587d803b64a1f4734b18c564 ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 7ebe183c6d444ef5587d803b64a1f4734b18c564 ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| net/ipv4/tcp_input.c | diff | blob | history |