[TIPC]: Optimize stream send routine to avoid fragmentation

This patch enhances TIPC's stream socket send routine so that
it avoids transmitting data in chunks that require fragmentation
and reassembly, thereby improving performance at both the
sending and receiving ends of the connection.

The "maximum packet size" hint that records MTU info allows
the socket to decide how big a chunk it should send; in the
event that the hint has become stale, fragmentation may still
occur, but the data will be passed correctly and the hint will
be updated in time for the following send.  Note: The 66060 byte
pseudo-MTU used for intra-node connections requires the send
routine to perform an additional check to ensure it does not
exceed TIPC"s limit of 66000 bytes of user data per chunk.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Jon Paul Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 4 deletions

diff --git a/net/tipc/port.h b/net/tipc/port.h
index 7ef4d64b32f7..e5f8c16429bd 100644
--- a/net/tipc/port.h
+++ b/net/tipc/port.h
@@ -1,8 +1,8 @@
 /*
  * net/tipc/port.h: Include file for TIPC port code
  *
- * Copyright (c) 1994-2006, Ericsson AB
- * Copyright (c) 2004-2005, Wind River Systems
+ * Copyright (c) 1994-2007, Ericsson AB
+ * Copyright (c) 2004-2007, Wind River Systems
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -81,7 +81,6 @@ struct user_port {
  * @acked:
  * @publications: list of publications for port
  * @pub_count: total # of publications port has made during its lifetime
- * @max_pkt: maximum packet size "hint" used when building messages sent by port
  * @probing_state:
  * @probing_interval:
  * @last_in_seqno:
@@ -102,7 +101,6 @@ struct port {
 	u32 acked;
 	struct list_head publications;
 	u32 pub_count;
-	u32 max_pkt;
 	u32 probing_state;
 	u32 probing_interval;
 	u32 last_in_seqno;