In article <20060628022119.GG927@bcd.geek.com.au>,
	Daniel Carosone <dan@geek.com.au> writes:
> I have a machine that seems to get floods of the above apparently
> rather nonsensical message when busy. There could be many reasons,
> none of which I have pursued or investigated as yet.
> 
> Just wondering if anyone else has seen this ...

Yes:

wm0 at pci2 dev 1 function 0: Intel i82547EI 1000BASE-T Ethernet, rev. 0
wm0: interrupting at ioapic0 pin 18 (irq 5)
wm0: Communication Streaming Architecture
wm0: using 82547 Tx FIFO stall work-around
wm0: 65536 word (16 address bits) SPI EEPROM
wm0: Ethernet address 00:11:d8:xx:xx:xx
igphy0 at wm0 phy 1: Intel IGP01E1000 Gigabit PHY, rev. 0
igphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
[...]
wm0: discarding oversize frame (len=-4)
wm0: discarding oversize frame (len=-4)
wm0: discarding oversize frame (len=-4)
wm0: discarding oversize frame (len=-4)

> ... or knows a cause.

I don't know it either.

> ... but I'm sure it hurts some throughput at least.

I don't think. The above machine can do Gigabit a line rate without problems.

	Kind regards

-- 
Matthias Scheler                                  http://scheler.de/~matthias/