netdev - Re: [PATCH net-next v3] tcp: avoid reducing cwnd when ACK+DSACK is received

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Message-ID: <CADVnQy=JDAoLtBnFXsQDTU1_OYFGpDCF1Un28iM1gz0KZDGoug@mail.gmail.com>
Date:	Mon, 12 Jan 2015 11:48:20 -0500
From:	Neal Cardwell <ncardwell@...gle.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Sébastien Barré <sebastien.barre@...ouvain.be>,
	David Miller <davem@...emloft.net>,
	Yuchung Cheng <ycheng@...gle.com>,
	Netdev <netdev@...r.kernel.org>,
	Gregory Detal <gregory.detal@...ouvain.be>,
	Nandita Dukkipati <nanditad@...gle.com>
Subject: Re: [PATCH net-next v3] tcp: avoid reducing cwnd when ACK+DSACK is received

On Mon, 2015-01-12 at 10:30 +0100, Sébastien Barré wrote:
> With TLP, the peer may reply to a probe with an
> ACK+D-SACK, with ack value set to tlp_high_seq. In the current code,
> such ACK+DSACK will be missed and only at next, higher ack will the TLP
> episode be considered done. Since the DSACK is not present anymore,
> this will cost a cwnd reduction.

Acked-by: Neal Cardwell <ncardwell@...gle.com>

Thanks!
neal
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