linux-toradex.git/net/ipv4/tcp_input.c, branch v2.6.19.2

[TCP]: Kill warning in tcp_clean_rtx_queue().

2006-10-04T07:31:08+00:00

GCC can't tell we always initialize 'tv' in all the cases
we actually use it, so explicitly set it up with zeros.

Signed-off-by: David S. Miller

[TCP]: Fix and simplify microsecond rtt sampling

2006-09-29T01:03:08+00:00

This changes the microsecond RTT sampling so that samples are taken in
the same way that RTT samples are taken for the RTO calculator: on the
last segment acknowledged, and only when the segment hasn't been
retransmitted.

Signed-off-by: John Heffner 
Acked-by: Stephen Hemminger 
Signed-off-by: David S. Miller

[TCP] net/ipv4/tcp_input.c: trivial annotations

2006-09-29T01:02:11+00:00

Signed-off-by: Al Viro 
Signed-off-by: David S. Miller

[TCP]: struct tcp_sack_block annotations

2006-09-29T01:02:04+00:00

Some of the instances of tcp_sack_block are host-endian, some - net-endian.
Define struct tcp_sack_block_wire identical to struct tcp_sack_block
with u32 replaced with __be32; annotate uses of tcp_sack_block replacing
net-endian ones with tcp_sack_block_wire.  Change is obviously safe since
for cc(1) __be32 is typedefed to u32.

Signed-off-by: Al Viro 
Signed-off-by: David S. Miller

[TCP]: Send ACKs each 2nd received segment.

2006-09-22T22:19:05+00:00

It does not affect either mss-sized connections (obviously) or
connections controlled by Nagle (because there is only one small
segment in flight).

The idea is to record the fact that a small segment arrives on a
connection, where one small segment has already been received and
still not-ACKed. In this case ACK is forced after tcp_recvmsg() drains
receive buffer.

In other words, it is a "soft" each-2nd-segment ACK, which is enough
to preserve ACK clock even when ABC is enabled.

Signed-off-by: Alexey Kuznetsov 
Signed-off-by: David S. Miller

[TCP]: Fix rcv mss estimate for LRO

2006-09-22T22:18:44+00:00

By passing a Linux-generated TSO packet straight back into Linux, Xen
becomes our first LRO user :) Unfortunately, there is at least one spot
in our stack that needs to be changed to cope with this.

The receive MSS estimate is computed from the raw packet size.  This is
broken if the packet is GSO/LRO.  Fortunately the real MSS can be found
in gso_size so we simply need to use that if it is non-zero.

Real LRO NICs should of course set the gso_size field in future.

Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller

[NET/IPV4/IPV6]: Change some sysctl variables to __read_mostly

2006-09-22T21:55:03+00:00

Change net/core, ipv4 and ipv6 sysctl variables to __read_mostly.

Couldn't actually measure any performance increase while testing (.3%
I consider noise), but seems like the right thing to do.

Signed-off-by: Brian Haley 
Signed-off-by: David S. Miller

[TCP]: Turn ABC off.

2006-09-18T06:21:02+00:00

Turn Appropriate Byte Count off by default because it unfairly
penalizes applications that do small writes.  Add better documentation
to describe what it is so users will understand why they might want to
turn it on.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

[TCP]: Two RFC3465 Appropriate Byte Count fixes.

2006-08-30T04:22:16+00:00

1) fix slow start after retransmit timeout
2) fix case of L=2*SMSS acked bytes comparison

Signed-off-by: Daikichi Osuga 
Signed-off-by: David S. Miller

[TCP]: Fixes IW > 2 cases when TCP is application limited

2006-08-05T05:59:52+00:00

Whenever a transfer is application limited, we are allowed at least
initial window worth of data per window unless cwnd is previously
less than that.

Signed-off-by: Ilpo Järvinen 
Signed-off-by: David S. Miller