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From: Wade Farnsworth <wfarnsworth@mvista.com>
To: Eugene Surovegin <ebs@ebshome.net>
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Date: 07 Dec 2005 08:15:28 -0700
Cc: linuxppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Transmit timeouts on 440GX Ocotea on 10baseT-HD network
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Hi Eugene,

I'm seeing some "NETDEV WATCHDOG: eth0: transmit timed out" messages on
the Ocotea when it's connected to a 10baseT hub, and it's put under
heavy load.  I'm using the most current 2.6 git tree.

This can be reproduced by ssh'ing into the Ocotea and running the
command "ping <host-machine> -A -s 1200", then also doing the same ping
command from the host to the Ocotea.  The pings will be successful for a
short time, then all transmits on the Ocotea will stop for a few seconds
(usually preceded by a few duplicate packets).  Transmits begin again
once the timeout occurs. /proc/net/dev doesn't report any errors, just a
few dropped packets.

Do you know what might be causing the EMAC to stop transmitting in this
situation?

Thanks,

Wade Farnsworth