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authorEric Dumazet <edumazet@google.com>2017-12-06 11:08:19 -0800
committerDavid S. Miller <davem@davemloft.net>2017-12-07 14:31:03 -0500
commit8632385022f2b05a6ca0b9e0f95575865de0e2ce (patch)
tree0d034255e3381ca1f3e797b712c9da9198fd3b3c
parent6e237d099fac1f73a7b6d7287bb9191f29585a4e (diff)
downloadlinux-8632385022f2b05a6ca0b9e0f95575865de0e2ce.tar.bz2
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: 645f4c6f2ebd ("tcp: switch rcv_rtt_est and rcvq_space to high resolution timestamps") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Wei Wang <weiwan@google.com> Cc: Neal Cardwell <ncardwell@google.com> Cc: Yuchung Cheng <ycheng@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/tcp_input.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 734cfc8ff76e..514c00732988 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -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;