Networking: Still waiting for mbuf cluster.

[Torsten Landschoff]

Hello List,

I ran into an interesting problem with RTEMS 4.7.99.2. I built a test
setup with a Virtex4 FPGA and everything seems to be working.

Now I created a new FPGA design for another application. RTEMS seems to
work fine, networking is up and I can ping the system.

Then I tried using TCP with the netdemo.exe, which basically hangs
RTEMS. I uploaded the original design again, and interestingly, TCP
would not work in netdemo.exe either.

At that point I remembered, that I used ttcp for testing TCP with the
original design and uploaded that. Curiously, that is working with the
original design.

Kind of reliefed, I uploaded the new FPGA setup and tried ttcp. There I
get the following error message:

ttcp-t: connect
Still waiting for mbuf cluster.
Still waiting for mbuf cluster.
Still waiting for mbuf cluster.
...

I am quite sure that something is up with the FPGA setup here, but
perhaps somebody has some clues where to look!? Could it be related to
cache configuration? Interestingly, ping's are still working (even flood
ping just slows down the RTEMS console output).

Thanks for any hint, Torsten