RE: e1000 fixes (NAPI)

[Feldman, Scott]

> Need another fix.  You need to reinstrument the tasklet 
> schedule in the fill_rx_ring instread of doing the whole thing from 
> interrupt.  When the system is loaded at 100% saturation on gigbit 
> with 300 byte packets or smaller, the driver does not allow any 
> processes to run, and you cannot log in via ssh or any user space 
> apps.  This is severely busted.   

That's one of the points of NAPI - to process high traffic Rx rates outside
of h/w interrupt context.

-scott