From: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Date: Tue, 27 Feb 2007 18:09:49 +0000 (-0800)
Subject: [TCP]: Add two new spurious RTO responses to FRTO
X-Git-Tag: v2.6.22-rc1~1128^2~423
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3cfe3baaf07c9e40a75f9a70662de56df1c246a8;p=pandora-kernel.git

[TCP]: Add two new spurious RTO responses to FRTO

New sysctl tcp_frto_response is added to select amongst these
responses:
	- Rate halving based; reuses CA_CWR state (default)
	- Very conservative; used to be the only one available (=1)
	- Undo cwr; undoes ssthresh and cwnd reductions (=2)

The response with rate halving requires a new parameter to
tcp_enter_cwr because FRTO has already reduced ssthresh and
doing a second reduction there has to be prevented. In addition,
to keep things nice on 80 cols screen, a local variable was
added.

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