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| author |   Eric Dumazet <edumazet@google.com> | 2018-02-28 14:40:46 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-03-01 21:44:28 -0500 |
| commit | dcb8c9b4373a583451b1b8a3e916d33de273633d (patch) | |
| tree | a77ade8d6e0ba6b56de0f5ea2f868b07d26af178 /include | |
| parent | socket: skip checking sk_err for recvmmsg(MSG_ERRQUEUE) (diff) | |
| download | linux-dev-dcb8c9b4373a583451b1b8a3e916d33de273633d.tar.xz linux-dev-dcb8c9b4373a583451b1b8a3e916d33de273633d.zip | |
tcp_bbr: better deal with suboptimal GSO (II)
This is second part of dealing with suboptimal device gso parameters.
In first patch (350c9f484bde "tcp_bbr: better deal with suboptimal GSO")
we dealt with devices having low gso_max_segs
Some devices lower gso_max_size from 64KB to 16 KB (r8152 is an example)
In order to probe an optimal cwnd, we want BBR being not sensitive
to whatever GSO constraint a device can have.
This patch removes tso_segs_goal() CC callback in favor of
min_tso_segs() for CC wanting to override sysctl_tcp_min_tso_segs
Next patch will remove bbr->tso_segs_goal since it does not have
to be persistent.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/tcp.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 92b06c6e7732..9c9b3768b350 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -511,8 +511,6 @@ __u32 cookie_v6_init_sequence(const struct sk_buff *skb, __u16 *mss); #endif /* tcp_output.c */ -u32 tcp_tso_autosize(const struct sock *sk, unsigned int mss_now, - int min_tso_segs); void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss, int nonagle); int __tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb, int segs); @@ -981,8 +979,8 @@ struct tcp_congestion_ops { u32 (*undo_cwnd)(struct sock *sk); /* hook for packet ack accounting (optional) */ void (*pkts_acked)(struct sock *sk, const struct ack_sample *sample); - /* suggest number of segments for each skb to transmit (optional) */ - u32 (*tso_segs_goal)(struct sock *sk); + /* override sysctl_tcp_min_tso_segs */ + u32 (*min_tso_segs)(struct sock *sk); /* returns the multiplier used in tcp_sndbuf_expand (optional) */ u32 (*sndbuf_expand)(struct sock *sk); /* call when packets are delivered to update cwnd and pacing rate, |