In article <1992Aug18.031517.8187@colorado.edu>, drew@kinglear.cs.colorado.edu (Drew Eckhardt) writes:

| With shared pages, COW is implemented.  Also, text / data / etc
| aren't loaded or initialized until the system gets a page fault
| for a not present page.

  For the person asking about memory protection, you can find some nice
discussions of memory management in thesis, and the feeling is that
there are some more areas left. Any discussion here (and I'm replying to
a pretty good one) will be an overview, since a good coverage of the
topic would be about 40 pages of print.

-- 
bill davidsen, GE Corp. R&D Center; Box 8; Schenectady NY 12345
    I admit that when I was in school I wrote COBOL. But I didn't compile.