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-rw-r--r--target/linux/generic/patches-3.3/060-tcp-ecn-dont-delay-ACKS-after-CE.patch61
1 files changed, 0 insertions, 61 deletions
diff --git a/target/linux/generic/patches-3.3/060-tcp-ecn-dont-delay-ACKS-after-CE.patch b/target/linux/generic/patches-3.3/060-tcp-ecn-dont-delay-ACKS-after-CE.patch
deleted file mode 100644
index 6f1cd1247b..0000000000
--- a/target/linux/generic/patches-3.3/060-tcp-ecn-dont-delay-ACKS-after-CE.patch
+++ /dev/null
@@ -1,61 +0,0 @@
-From patchwork Mon Aug 6 21:04:43 2012
-Content-Type: text/plain; charset="utf-8"
-MIME-Version: 1.0
-Content-Transfer-Encoding: 7bit
-Subject: [net-next] tcp: ecn: dont delay ACKS after CE
-Date: Mon, 06 Aug 2012 11:04:43 -0000
-From: Eric Dumazet <eric.dumazet@gmail.com>
-X-Patchwork-Id: 175453
-Message-Id: <1344287083.26674.83.camel@edumazet-glaptop>
-To: David Miller <davem@davemloft.net>
-Cc: netdev <netdev@vger.kernel.org>,
- Neal Cardwell <ncardwell@google.com>
-
-From: Eric Dumazet <edumazet@google.com>
-
-While playing with CoDel and ECN marking, I discovered a
-non optimal behavior of receiver of CE (Congestion Encountered)
-segments.
-
-In pathological cases, sender has reduced its cwnd to low values,
-and receiver delays its ACK (by 40 ms).
-
-While RFC 3168 6.1.3 (The TCP Receiver) doesn't explicitly recommend
-to send immediate ACKS, we believe its better to not delay ACKS, because
-a CE segment should give same signal than a dropped segment, and its
-quite important to reduce RTT to give ECE/CWR signals as fast as
-possible.
-
-Note we already call tcp_enter_quickack_mode() from TCP_ECN_check_ce()
-if we receive a retransmit, for the same reason.
-
-Signed-off-by: Eric Dumazet <edumazet@google.com>
-Cc: Neal Cardwell <ncardwell@google.com>
-Acked-by: Neal Cardwell <ncardwell@google.com>
-
----
-net/ipv4/tcp_input.c | 6 +++++-
- 1 file changed, 5 insertions(+), 1 deletion(-)
-
-
-
---
-To unsubscribe from this list: send the line "unsubscribe netdev" in
-the body of a message to majordomo@vger.kernel.org
-More majordomo info at http://vger.kernel.org/majordomo-info.html
-
---- a/net/ipv4/tcp_input.c
-+++ b/net/ipv4/tcp_input.c
-@@ -231,7 +231,11 @@ static inline void TCP_ECN_check_ce(stru
- tcp_enter_quickack_mode((struct sock *)tp);
- break;
- case INET_ECN_CE:
-- tp->ecn_flags |= TCP_ECN_DEMAND_CWR;
-+ if (!(tp->ecn_flags & TCP_ECN_DEMAND_CWR)) {
-+ /* Better not delay acks, sender can have a very low cwnd */
-+ tcp_enter_quickack_mode((struct sock *)tp);
-+ tp->ecn_flags |= TCP_ECN_DEMAND_CWR;
-+ }
- /* fallinto */
- default:
- tp->ecn_flags |= TCP_ECN_SEEN;