From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net] tcp: fix SYNACK RTT estimation in Fast Open
Date: Sun, 27 Oct 2013 16:51:27 -0400 (EDT)
Message-ID: <20131027.165127.1930968854676042241.davem@davemloft.net>
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From: Yuchung Cheng <ycheng@google.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@google.com>

Applied and queued up for -stable.