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| author | John Heffner <johnwheffner@gmail.com> | 2008-04-29 03:13:52 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-29 03:13:52 -0700 |
| commit | 246eb2af060fc32650f07203c02bdc0456ad76c7 (patch) | |
| tree | aea2a9d4e65331edb6355fb4fed27b73a02d6e28 | |
| parent | ce447eb91409225f8a488f6b7b2a1bdf7b2d884f (diff) | |
| download | lwn-246eb2af060fc32650f07203c02bdc0456ad76c7.tar.gz lwn-246eb2af060fc32650f07203c02bdc0456ad76c7.zip | |
tcp: Limit cwnd growth when deferring for GSO
This fixes inappropriately large cwnd growth on sender-limited flows
when GSO is enabled, limiting cwnd growth to 64k.
Signed-off-by: John Heffner <johnwheffner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/tcp_cong.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c index bfb1996bd99f..6a250828b767 100644 --- a/net/ipv4/tcp_cong.c +++ b/net/ipv4/tcp_cong.c @@ -287,7 +287,8 @@ int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight) left = tp->snd_cwnd - in_flight; if (sk_can_gso(sk) && - left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd) + left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd && + left * tp->mss_cache < sk->sk_gso_max_size) return 1; return left <= tcp_max_burst(tp); } |