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From: perand@admin.kth.se (Per Andersson)
Newsgroups: comp.unix.xenix,comp.unix.i386
Subject: Re: Using GCC/GAS Xenix on AT&T Unix V/386.3.2
Message-ID: <1990May2.220056.25855@kth.se>
Date: 2 May 90 22:00:56 GMT
References: <2496@crash.cts.com>
Reply-To: perand@admin.kth.se (Per Andersson)
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 26

In article <2496@crash.cts.com> jca@pnet01.cts.com (John C. Archambeau) writes:
>
>Maybe I'd better refine the question, what's the difference between ordinary
>swapping and demand paging?  I've heard of systems having both and the demand
>pager kicking in when the swapper is heavily loaded.  Or am I listening to
>misinformation?

Swapping is when you move whole processes in and out of memory, paging when
you move parts (pages). This is my favourite bashing of System V contra BSD.
System V up to and including 3.2 doesn't have paging ! The most recent trouble
I had with this was when installing the brand new 386/ix on my machine. 
I found some nice things not in the kernel, and added support for them, but no,
there was to little memory to run them. Then I tried to build a new kernel,
like the original one - bang. The linker process was to big to fit in memory 
at the same time as the OS, so it wouldn't build. Yawn..... Of course I could 
have read the manual but...
Now does anybody really know if Xenix/386 can do paging ?

Per


-- 
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Per Andersson
Royal Institute of Technology, Stockholm, Sweden
perand@admin.kth.se, @nada.kth.se