tcp: fix tcp_grow_window() for large incoming frames
authorEric Dumazet <edumazet@google.com>
Mon, 16 Apr 2012 23:28:07 +0000 (23:28 +0000)
committerBen Hutchings <ben@decadent.org.uk>
Fri, 11 May 2012 12:14:26 +0000 (13:14 +0100)
commitf8f811922bb85977a1c30f4788cca14b5741f9b9
tree3c1e776f60082033b2abbe5fc8ab45aad628d388
parent829a94ac60173dca2a30b65ea43c5c01150bd233
tcp: fix tcp_grow_window() for large incoming frames

[ Upstream commit 4d846f02392a710f9604892ac3329e628e60a230 ]

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: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Tom Herbert <therbert@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
net/ipv4/tcp_input.c