tree b01eba7a8b9cf737312c3721ff8ef361baa55bea
parent 6dcbc12290abb452a5e42713faa6461b248e2f55
author Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> 1284571672 -0700
committer David S. Miller <davem@davemloft.net> 1284577304 -0700

tcp: Prevent overzealous packetization by SWS logic.

If peer uses tiny MSS (say, 75 bytes) and similarly tiny advertised
window, the SWS logic will packetize to half the MSS unnecessarily.

This causes problems with some embedded devices.

However for large MSS devices we do want to half-MSS packetize
otherwise we never get enough packets into the pipe for things
like fast retransmit and recovery to work.

Be careful also to handle the case where MSS > window, otherwise
we'll never send until the probe timer.

Reported-by: ツ Leandro Melo de Sales <leandroal@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>