From: David S. Miller <davem@sunset.davemloft.net>
Date: Mon, 25 Apr 2005 02:12:33 +0000 (-0700)
Subject: [TCP]: skb pcount with MTU discovery
X-Git-Tag: v2.6.12-rc4~237
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d5ac99a648b8c61d0c7f1c32a8ab7f1dca0123d2;p=pandora-kernel.git

[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>
---

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