netdev - Re: [PATCH net] tcp: fix SYNACK RTT estimation in Fast Open

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Message-Id: <20131027.165111.1185105972050420833.davem@davemloft.net>
Date:	Sun, 27 Oct 2013 16:51:11 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	ycheng@...gle.com
Cc:	ncardwell@...gle.com, edumazet@...gle.com, panweiping3@...il.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH net] tcp: fix SYNACK RTT estimation in Fast Open

From: Yuchung Cheng <ycheng@...gle.com>
Date: Thu, 24 Oct 2013 08:44:25 -0700

> tp->lsndtime may not always be the SYNACK timestamp if a passive
> Fast Open socket sends data before handshake completes. And if the
> remote acknowledges both the data and the SYNACK, the RTT sample
> is already taken in tcp_ack(), so no need to call
> tcp_update_ack_rtt() in tcp_synack_rtt_meas() aagain.
> 
> Signed-off-by: Yuchung Cheng <ycheng@...gle.com>

Applied and queued up for -stable.
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