Path: utzoo!attcan!telly!ixpierre!woods
From: woods@ixpierre.uucp (Greg A. Woods)
Newsgroups: comp.os.misc
Subject: Re: a very naive Question???
Summary: Demand paging?
Message-ID: <1988Oct14.040641.23326@ixpierre.uucp>
Date: 14 Oct 88 04:06:41 GMT
References: <837@amethyst.ma.arizona.edu>
Reply-To: woods@ixpierre.UUCP (Greg A. Woods)
Organization: G. A. W. Consulting
Lines: 27

In article <837@amethyst.ma.arizona.edu> chris@spock.ame.arizona.edu (Chris Ott) writes:
> mark@hubcap.UUCP (Mark Smotherman) writes:
> > > In article <835@amethyst.ma.arizona.edu>, chris@spock (Chris Ott) writes:
> > >      Close, but not quite. Demand paging involves only the code portion of
> > > the program.
> >
> > Page only the code portion?  News to me!
> 
>      I didn't mean that only the code portion is paged, I meant that only
> the code portion is _demand paged_.

I had the distinct impression that this was called direct paging.
What is commonly called "virtual" memory is actually more properly
referred to as "demand paged virtual memory".

Just to get your goat, you might like to know that MS-Windows (and I
presume MS-DOS 4.0 also do direct paging, though it's done with
segments :-).

Unix System V/386 Release 3.2 (also called 386/ix Release 2.0) will
have direct paging (as well as continuing to implement demand paged
virtual memory).  At least that's what they tell me :-).
-- 
						Greg Woods.

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