Re-entrant code in network drivers (cross-post)

[Amit Kucheria <amitk@ittc.ku.edu>]

Hi all,

I am trying to understand the issues in writing a driver that is 
re-entrant. What are the locking issues involved (if any)?

For example, if there are say 4 3com network cards in a box, I would 
assume that the same piece of 3com driver code is being used by all 4 of 
them. They would be sharing (all?) the code. Now if packets arrive to each 
of the cards, how does the kernel handle processing these packets thru the 
same code to avoid messing up the device queues?

Any code examples, pointers, tutorials are most welcome.

Regards,
Amit
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                  Amit Kucheria
          EECS Grad. Research Assistant
         University of Kansas @ Lawrence
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