diff options
| author | Eric Dumazet <edumazet@google.com> | 2014-10-27 21:45:24 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-10-29 15:05:15 -0400 |
| commit | dca145ffaa8d39ea1904491ac81b92b7049372c0 (patch) | |
| tree | ebe67ece694b9e54281047a6037b7d5776f9f56b /include/linux/tcp.h | |
| parent | 7aef06db0f91c7b48305d07b62edf43179adb28c (diff) | |
| download | lwn-dca145ffaa8d39ea1904491ac81b92b7049372c0.tar.gz lwn-dca145ffaa8d39ea1904491ac81b92b7049372c0.zip | |
tcp: allow for bigger reordering level
While testing upcoming Yaogong patch (converting out of order queue
into an RB tree), I hit the max reordering level of linux TCP stack.
Reordering level was limited to 127 for no good reason, and some
network setups [1] can easily reach this limit and get limited
throughput.
Allow a new max limit of 300, and add a sysctl to allow admins to even
allow bigger (or lower) values if needed.
[1] Aggregation of links, per packet load balancing, fabrics not doing
deep packet inspections, alternative TCP congestion modules...
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yaogong Wang <wygivan@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 | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index c2dee7deefa8..f566b8567892 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -204,10 +204,10 @@ struct tcp_sock { u16 urg_data; /* Saved octet of OOB data and control flags */ u8 ecn_flags; /* ECN status bits. */ - u8 reordering; /* Packet reordering metric. */ + u8 keepalive_probes; /* num of allowed keep alive probes */ + u32 reordering; /* Packet reordering metric. */ u32 snd_up; /* Urgent pointer */ - u8 keepalive_probes; /* num of allowed keep alive probes */ /* * Options received (usually on last packet, some only on SYN packets). */ |