From 91c5e6553af065f30390a76bf0556672d6cbb6ab Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 6 Dec 2017 11:08:19 -0800 Subject: tcp: use current time in tcp_rcv_space_adjust() [ Upstream commit 8632385022f2b05a6ca0b9e0f95575865de0e2ce ] 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: 645f4c6f2ebd ("tcp: switch rcv_rtt_est and rcvq_space to high resolution timestamps") Signed-off-by: Eric Dumazet Cc: Wei Wang Cc: Neal Cardwell Cc: Yuchung Cheng Acked-by: Neal Cardwell Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv4/tcp_input.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net') diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index b6bb3cdfad09..4b10e79210aa 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -592,6 +592,7 @@ 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; -- cgit v1.2.3