From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net] tcp: fix double-counted receiver RTT when leaving
 receiver fast path
Date: Mon, 04 Mar 2013 14:16:08 -0500 (EST)
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From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 04 Mar 2013 08:55:33 -0800

> On Mon, 2013-03-04 at 11:23 -0500, Neal Cardwell wrote:
>> We should not update ts_recent and call tcp_rcv_rtt_measure_ts() both
>> before and after going to step5. That wastes CPU and double-counts the
>> receiver-side RTT sample.
>> 
>> Signed-off-by: Neal Cardwell <ncardwell@google.com>
 ...
> Acked-by: Eric Dumazet <edumazet@google.com>

Applied and queued up for -stable.