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| author | Eric Dumazet <edumazet@google.com> | 2018-12-05 14:24:31 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-12-05 16:31:59 -0800 |
| commit | 41727549de3e7281feb174d568c6e46823db8684 (patch) | |
| tree | 3f09b74ec1221e468e4036cb13c0cdc038ce970b | |
| parent | e37d05a538a6656e108f7704ad66e1ccc13d6f68 (diff) | |
| download | linux-stable-41727549de3e7281feb174d568c6e46823db8684.tar.gz linux-stable-41727549de3e7281feb174d568c6e46823db8684.tar.bz2 linux-stable-41727549de3e7281feb174d568c6e46823db8684.zip | |
tcp: Do not underestimate rwnd_limited
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>
| -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 68b5326f7321..318690234758 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2356,8 +2356,11 @@ 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; |