netdev - Re: [PATCH net-next 02/17] tcp: don't backtrack to sacked skbs

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Message-Id: <20090302.030103.89533524.davem@davemloft.net>
Date:	Mon, 02 Mar 2009 03:01:03 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	ilpo.jarvinen@...sinki.fi
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 02/17] tcp: don't backtrack to sacked skbs

From: "Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi>
Date: Sat, 28 Feb 2009 16:44:27 +0200

> From: Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>
> 
> Backtracking to sacked skbs is a horrible performance killer
> since the hint cannot be advanced successfully past them...
> ...And it's totally unnecessary too.
> 
> In theory this is 2.6.27..28 regression but I doubt anybody
> can make .28 to have worse performance because of other TCP
> improvements.
> 
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>

Applied.
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