440ep/ge EMAC problems whith simultanious trafic on both Ethernet ports

Hi,
I've noticed strange problem,=20
With newer kernels 2.6.18, 2.6.19 when trying to load both Ethernet =
interfaces (for example root FS is mounted via NFS on eth0 and large =
TFTP file transfer is performed on eth1), the following happens:
- either ethernet throughput is drastically reduced, pings become 1-4s =
(on both interfaces), however everything works;
- or "NETDEV WATCHDOG: eth0: transmit timed out" happens. With debug on =
I see that drivers tries to recover from this, but with no success, the =
only way is to reboot board.=20

As I remember, in earlier kernels (2.6.11 for sure) it works. Also using =
only one interface at a moment, no problem (24h tests, 100's of gigabyte =
tranferred). =20

Any ideas/suggestions?

thanks in advance,
--
Andriy Korud