[Samba] Samba 3.0.4 Performance Problem (tcp win 1)

[Chris Richards]

Howdy.  I have observed a horrific performance problem in my setup. 
I'm running samba on a Linux Fedora Core 1 machine with Windows
clients.  The samba server is communicating with a Windows 98 machine.

$ /usr/sbin/smbd -V
Version 3.0.4-1.FC1

The configuration of my server is mostly default with the exception of
print, passwords, and share configurations.

My Linux interface is seeing about 250KB/s traffic from the Windows
client.  However, it takes several seconds to transfer 100KB of data. 
Using tcpdump on the interface shows that the smb server is
advertising a window size of one (1).  Egads!

  13:58:03.728704 192.168.1.20.1025 > sloth.netbios-ssn: . 400:401(1)
ack 1 win 8243 NBT Packet (DF)
  13:58:03.728851 sloth.netbios-ssn > 192.168.1.20.1025: . ack 401 win 1 (DF)
  13:58:03.729631 192.168.1.20.1025 > sloth.netbios-ssn: . 401:402(1)
ack 1 win 8243 NBT Packet (DF)
  13:58:03.729787 sloth.netbios-ssn > 192.168.1.20.1025: . ack 402 win 1 (DF)
  ...

Quite the spew, repeating forever as fast as it can.  For the record,
the socket options defined in smb.conf are:

   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192

Cycling the server has no effect.  All other traffic to and through
the Linux box is functioning as expected (the Linux box is my
NAT/firewall machine).

Help?

Thanks.
/ds