From: Yuchung Cheng <ycheng@google.com>
Date: Wed, 2 May 2012 13:30:04 +0000 (+0000)
Subject: tcp: early retransmit: delayed fast retransmit
X-Git-Tag: v3.5-rc1~109^2~195
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=750ea2bafa55aaed208b2583470ecd7122225634;p=pandora-kernel.git

tcp: early retransmit: delayed fast retransmit

Implementing the advanced early retransmit (sysctl_tcp_early_retrans==2).
Delays the fast retransmit by an interval of RTT/4. We borrow the
RTO timer to implement the delay. If we receive another ACK or send
a new packet, the timer is cancelled and restored to original RTO
value offset by time elapsed.  When the delayed-ER timer fires,
we enter fast recovery and perform fast retransmit.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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