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Commit 86323850 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

tcp: use current time in tcp_rcv_space_adjust() 



When I switched rcv_rtt_est to high resolution timestamps, I forgot
that tp->tcp_mstamp needed to be refreshed in tcp_rcv_space_adjust()

Using an old timestamp leads to autotuning lags.

Fixes: 645f4c6f ("tcp: switch rcv_rtt_est and rcvq_space to high resolution timestamps")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Wei Wang <weiwan@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: default avatarNeal Cardwell <ncardwell@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6e237d09

net/ipv4/tcp_input.c

+1 −0
Original line number Diff line number Diff line
@@ -579,6 +579,7 @@ void tcp_rcv_space_adjust(struct sock *sk) 
	int time;

	int copied;



	tcp_mstamp_refresh(tp);

	time = tcp_stamp_us_delta(tp->tcp_mstamp, tp->rcvq_space.time);

	if (time < (tp->rcv_rtt_est.rtt_us >> 3) || tp->rcv_rtt_est.rtt_us == 0)

		return;