diff options
| author | Yuchung Cheng <ycheng@google.com> | 2017-11-08 13:01:27 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-11 18:53:16 +0900 |
| commit | 737ff314563ca27f044f9a3a041e9d42491ef7ce (patch) | |
| tree | a95677bca04ad68e0c1a60fa343d59d24934e669 /include/linux/tcp.h | |
| parent | 713bafea92920103cd3d361657406cf04d0e22dd (diff) | |
tcp: use sequence distance to detect reordering
Replace the reordering distance measurement in packet unit with
sequence based approach. Previously it trackes the number of "packets"
toward the forward ACK (i.e. highest sacked sequence)in a state
variable "fackets_out".
Precisely measuring reordering degree on packet distance has not much
benefit, as the degree constantly changes by factors like path, load,
and congestion window. It is also complicated and prone to arcane bugs.
This patch replaces with sequence-based approach that's much simpler.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Priyaranjan Jha <priyarjha@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/tcp.h')
| -rw-r--r-- | include/linux/tcp.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 9574936fe041..df5d97a85e1a 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -293,7 +293,6 @@ struct tcp_sock { u32 pushed_seq; /* Last pushed seq, required to talk to windows */ u32 lost_out; /* Lost packets */ u32 sacked_out; /* SACK'd packets */ - u32 fackets_out; /* FACK'd packets */ struct hrtimer pacing_timer; |