netdev - Re: [PATCH] tcp: should use number of sack blocks instead of -1

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Message-Id: <20081021.162920.219684361.davem@davemloft.net>
Date:	Tue, 21 Oct 2008 16:29:20 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ilpo.jarvinen@...sinki.fi
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] tcp: should use number of sack blocks instead of -1

From: "Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi>
Date: Tue, 21 Oct 2008 11:58:05 +0300 (EEST)

> While looking for the recent "sack issue" I also read all eff_sacks
> usage that was played around by some relevant commit. I found
> out that there's another thing that is asking for a fix (unrelated
> to the "sack issue" though).
> 
> This feature has probably very little significance in practice.
> Opposite direction timeout with bidirectional tcp comes to me as
> the most likely scenario though there might be other cases as
> well related to non-data segments we send (e.g., response to the
> opposite direction segment). Also some ACK losses or option space
> wasted for other purposes is necessary to prevent the earlier
> SACK feedback getting to the sender.
...
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>

Applied, thanks Ilpo.
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