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Message-Id: <20070227.101026.89037327.davem@davemloft.net>
Date: Tue, 27 Feb 2007 10:10:26 -0800 (PST)
From: David Miller <davem@...emloft.net>
To: ilpo.jarvinen@...sinki.fi
Cc: netdev@...r.kernel.org
Subject: Re: [PATCH 1/2] [TCP]: Add two new spurious RTO responses to FRTO
From: "Ilpo_Järvinen" <ilpo.jarvinen@...sinki.fi>
Date: Tue, 27 Feb 2007 17:50:06 +0200 (EET)
> 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@...sinki.fi>
Applied to tcp-2.6, thanks!
I tidied up the coding style of the switch statement slightly.
So that it reads like this:
switch (sysctl_tcp_frto_response) {
case 2:
tcp_undo_spur_to_response(sk);
break;
case 1:
tcp_conservative_spur_to_response(tp);
break;
default:
tcp_ratehalving_spur_to_response(sk);
break;
};
Thanks again.
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