From: Kenneth Klette Jonassen <kennetkl@ifi.uio.no>
Date: Thu, 29 Jan 2015 19:08:03 +0000 (+0100)
Subject: tcp: use SACK RTTs for CC
X-Git-Tag: fixes-v4.0-rc1~150^2~94
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=932eb7638ad7d9145620178992044b5e87356969;p=pandora-kernel.git

tcp: use SACK RTTs for CC

Current behavior only passes RTTs from sequentially acked data to CC.

If sender gets a combined ACK for segment 1 and SACK for segment 3, then the
computed RTT for CC is the time between sending segment 1 and receiving SACK
for segment 3.

Pass the minimum computed RTT from any acked data to CC, i.e. time between
sending segment 3 and receiving SACK for segment 3.

Signed-off-by: Kenneth Klette Jonassen <kennetkl@ifi.uio.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
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