From: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Date: Thu, 22 Feb 2007 07:02:30 +0000 (-0800)
Subject: [TCP] FRTO: Consecutive RTOs keep prior_ssthresh and ssthresh
X-Git-Tag: v2.6.22-rc1~1128^2~443
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7487c48c4fd15d1e2542be1183b783562cfe10bc;p=pandora-kernel.git

[TCP] FRTO: Consecutive RTOs keep prior_ssthresh and ssthresh

In case a latency spike causes more than one RTO, the later should not
cause the already reduced ssthresh to propagate into the prior_ssthresh
since FRTO declares all such RTOs spurious at once or none of them. In
treating of ssthresh, we mimic what tcp_enter_loss() does.

The previous state (in frto_counter) must be available until we have
checked it in tcp_enter_frto(), and also ACK information flag in
process_frto().

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
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