tree 3811d84e83dab918c57aeca1081ae343cb97df8b
parent 158a0e45b69254a9ee4d7795e3b98d8c959fb799
author David S. Miller <davem@sunset.davemloft.net> 1114395153 -0700
committer David S. Miller <davem@davemloft.net> 1114395153 -0700

[TCP]: skb pcount with MTU discovery

The problem is that when doing MTU discovery, the too-large segments in
the write queue will be calculated as having a pcount of >1.  When
tcp_write_xmit() is trying to send, tcp_snd_test() fails the cwnd test
when pcount > cwnd.

The segments are eventually transmitted one at a time by keepalive, but
this can take a long time.

This patch checks if TSO is enabled when setting pcount.

Signed-off-by: John Heffner <jheffner@psc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>