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Message-Id: <20080512.154838.163999274.davem@davemloft.net>
Date: Mon, 12 May 2008 15:48:38 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: ilpo.jarvinen@...sinki.fi
Cc: damon@...tek.com, netdev@...r.kernel.org
Subject: Re: Fix FRTO+NewReno problem
From: "Ilpo_Järvinen" <ilpo.jarvinen@...sinki.fi>
Date: Mon, 12 May 2008 22:12:47 +0300 (EEST)
> Then one question for DaveM:
>
> What I'm not fully sure of, is do we want this workaround to be a sysctl
> or unconditionally enabled which causes potentially up to two unnecessary
> retransmissions? With SACK one or both of them will get SACKed before they
> get retransmitted (both cases have common scenarios). (I made that
> workaround patch for 2.6.24.1, so YMMV if you just plainly try to apply it
> to net-2.6).
I think we will have to handle this behavior, unconditionally, all
the time. Don't even add the sysctl.
If I understand correctly, it is only non-SACK newreno case that can
get the unnecessary retransmissions, right? If so, it's not a big
deal at all.
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