Commit 4d846f02 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

tcp: fix tcp_grow_window() for large incoming frames

tcp_grow_window() has to grow rcv_ssthresh up to window_clamp, allowing
sender to increase its window.

tcp_grow_window() still assumes a tcp frame is under MSS, but its no
longer true with LRO/GRO.

This patch fixes one of the performance issue we noticed with GRO on.

Signed-off-by: default avatarEric Dumazet <>
Cc: Neal Cardwell <>
Cc: Tom Herbert <>
Acked-by: default avatarNeal Cardwell <>
Signed-off-by: default avatarDavid S. Miller <>
parent 48159f00
......@@ -335,6 +335,7 @@ static void tcp_grow_window(struct sock *sk, const struct sk_buff *skb)
incr = __tcp_grow_window(sk, skb);
if (incr) {
incr = max_t(int, incr, 2 * skb->len);
tp->rcv_ssthresh = min(tp->rcv_ssthresh + incr,
inet_csk(sk)->icsk_ack.quick |= 1;
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