[vortex] Re: MTU discovery

[Jeff Garzik]

Donald Becker wrote:
> A 16 bit register.. 64KB packets.  There are various issues with using
> large packet sizes.  There is no driver that has been verified with
> jumbo frames.  I have been throwing driver versions at Rishi Srivatsavai
> <rishis at CLEMSON.EDU> trying to sort out the issues.  You might notice
> the changes in 0.99W, although they don't handle the FIFO limit issues.


With the VLAN stuff that suddenly appeared, I did some large packet 
testing...  I would typically cap the MTU limit at just under the FIFO 
size, since it often requires special handling doing frames > FIFO size.

I do not look forward to re-verifying the 2.4 tulip driver across all 
those chipsets, to make sure my large packet code [which is not yet in 
the kernel] works. :)

	Jeff



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