[U-Boot] [PATCH 1/3] net: defragment IP packets

[Robin Getz]

On Fri 31 Jul 2009 03:46, Alessandro Rubini pondered:
> > For some reason - why I'm ping flooding when tftping a large file (with
> > large tftp block size) - things hang. If I set the block size to under 
> > the MTU - it works fine. Do you get the same?
> 
> Didn't try, and I can't do that today. I suspect either your ping is
> over-mtu, so each new fragment triggers the above code, or simply your
> ether+uboot can't keep up with the data rate.

I tried on a different network (tftp a 18M file) - and it worked without 
issues while ping flooding...

Until I filled up the max number of packets on the target (and it did start 
loosing things). 

"sudo ping -l 3 -f targetip" worked fine while transferring the file...

"sudo ping -l 4 -f targetip" made things fall over - but this is a function of 
the ethernet driver, not anything else. (We pre-allocate 4 packets worth of 
info, and and only allow 4 packets to stack up). Even when there is no 
fragmentation - this causes it to fail....

So, I'll have to see what is going on with my network at home - so it could 
just be the network couldn't keep up...