netdev - Re: [PATCH net-2.6] [TCP]: Congestion control API RTT sampling fix

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Date:	Fri, 15 Jun 2007 07:32:55 -0700
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	"Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi>"@smtp2.linux-foundation.org
Cc:	David Miller <davem@...emloft.net>, Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-2.6] [TCP]: Congestion control API RTT sampling fix

On Fri, 15 Jun 2007 12:30:12 +0300 (EEST)
"Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi> wrote:

> Commit 164891aadf1721fca4dce473bb0e0998181537c6 broke RTT
> sampling of congestion control modules. Inaccurate timestamps
> could be fed to them without providing any way for them to
> identify such cases. Previously RTT sampler was called only if
> FLAG_RETRANS_DATA_ACKED was not set filtering inaccurate
> timestamps nicely. In addition, the new behavior could give an
> invalid timestamp (zero) to RTT sampler if only skbs with
> TCPCB_RETRANS were ACKed. This solves both problems.
> 
> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>
>
Yes, let's get this in 2.6.22
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