netdev - Re: Fix FRTO+NewReno problem

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Message-Id: <20080513.024915.161125347.davem@davemloft.net>
Date:	Tue, 13 May 2008 02:49:15 -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: Tue, 13 May 2008 12:42:03 +0300 (EEST)

> On Mon, 12 May 2008, David Miller wrote:
> 
> > 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.
> 
> No, also SACK could get at least one quite easily if TCP has a small 
> window, to get two of them with SACK one needs to have a stranger case
> unless I missed something. If I just remove that forward transmission LOST 
> marking avoidance unconditionally, it fixes that SACKFRTO window of 
> failure too which was a pending thing to fix :-).

Ok.

> Btw, the first two fixes (workaround was not included) also fixed bugzilla 
> #10063, I just got a confirmation about that as well.
> 
> I'll send the two patches still pending separately in a minute.

Thank you.
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