diff options
| author | Eric Dumazet | 2018-12-05 23:24:31 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2018-12-17 09:24:28 +0100 |
| commit | 03b271cb9175b8fc9d6dfcfb3e87f23a7d6815dc (patch) | |
| tree | 0e2db0032aaf7c8cc3f75cc833875e64049cf455 /net | |
| parent | sctp: kfree_rcu asoc (diff) | |
| download | kernel-qcow2-linux-03b271cb9175b8fc9d6dfcfb3e87f23a7d6815dc.tar.gz kernel-qcow2-linux-03b271cb9175b8fc9d6dfcfb3e87f23a7d6815dc.tar.xz kernel-qcow2-linux-03b271cb9175b8fc9d6dfcfb3e87f23a7d6815dc.zip | |
tcp: Do not underestimate rwnd_limited
[ Upstream commit 41727549de3e7281feb174d568c6e46823db8684 ]
If available rwnd is too small, tcp_tso_should_defer()
can decide it is worth waiting before splitting a TSO packet.
This really means we are rwnd limited.
Fixes: 5615f88614a4 ("tcp: instrument how long TCP is limited by receive window")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_output.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 68f65ddf9e3c..97e8aea4ac71 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2338,8 +2338,11 @@ static bool tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle, } else { if (!push_one && tcp_tso_should_defer(sk, skb, &is_cwnd_limited, - max_segs)) + max_segs)) { + if (!is_cwnd_limited) + is_rwnd_limited = true; break; + } } limit = mss_now; |