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School of Computer Science & Engineering
University of New South Wales

 Advanced Operating Systems 
 COMP9242 2002/S2 
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Next: What to run first? Up: 01-l4 Previous: Device drivers

Implication of server architecture

``OS'' is just a user-level L4 task.

==> OS can be interrupted & unscheduled.

==> Need concurrency control on all OS data structures!



Gernot Heiser 2002-08-07