UNSW Computer Science and Engineering Technical Report no. UNSW-CSE-TR-9504 (13 pages: compressed postscript file 9504.pdf) Title: Single Address Space Operating Systems Authors: Tim Wilkinson and Kevin Murray Systems Architecture Research Centre City University Northampton Square London EC1V 0HB, UK and Stephen Russell and Gernot Heiser School of Computer Science and Engineering University of New South Wales Sydney 2052 Australia and Jochen Liedtke German National Research Center for Information Technology GMD SET-RS Schlo{\ss} Birlinghoven 53757 Sankt Augustin Germany E-mail: {tim,kam\}@sarc.city.ac.uk {smr,gernot\}@cse.unsw.edu.au jochen.liedtke@gmd.de Abstract: Single address-space operating systems offer many advantages for modern systems design. We outline in this paper how such a system deals with the issues of memory protection, user-level naming, resource management, and translation management in a large, sparse address space, as well as fault tolerance and reliability. We also explain how a POSIX compliant interface can be supported on such a system. ftp://ftp.cse.unsw.edu.au/pub/doc/papers/UNSW/9504.pdf