From: Ronald G Minnich <rminnich@lanl.gov>
To: <9fans@cse.psu.edu>
Subject: Re: [9fans] Virtual memory & paging
Date: Mon, 4 Feb 2002 09:15:18 -0700 [thread overview]
Message-ID: <Pine.LNX.4.33.0202040911340.3428-100000@snaresland.acl.lanl.gov> (raw)
In-Reply-To: <3.0.6.32.20020204092636.0099aee0@pop3.clear.net.nz>
On Mon, 4 Feb 2002, Andrew Simmons wrote:
> Thanks for that - it was a dumb question.
actually not a dumb question I think. There have been supercomputers with
no VM hardware that were built, and the OS on these remapped (relinked)
executables at program load time, so as to avoid the overhead that you get
with VM (basically a bunch of logic in the address path). So in essence
the start address in your code and the address of your data would be
unique for each execution of your program.
Some of the more fancy ones wrapped base and bounds registers around each
program, and that was as far as protection went.
ron
next prev parent reply other threads:[~2002-02-04 16:15 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-03 23:08 geoff
2002-02-03 20:26 ` Andrew Simmons
2002-02-04 16:15 ` Ronald G Minnich [this message]
2002-02-04 6:21 ` Richard Uhtenwoldt
-- strict thread matches above, loose matches on Subject: below --
2002-02-15 14:32 Richard Uhtenwoldt
2002-02-16 21:56 ` Ronald G Minnich
2002-02-05 10:57 geoff
2002-02-05 11:37 ` Boyd Roberts
2002-02-05 14:01 ` david presotto
2002-02-04 11:03 Fco.J.Ballesteros
2002-02-04 10:59 forsyth
2002-02-04 10:38 geoff
2002-02-04 11:16 ` Boyd Roberts
2002-02-04 11:45 ` Boyd Roberts
2002-02-04 17:10 ` Andrew Simmons
2002-02-05 11:17 ` Boyd Roberts
2002-03-30 4:26 ` Richard Maxwell Underwood
2002-02-05 9:53 ` Thomas Bushnell, BSG
2002-02-05 16:06 ` Ronald G Minnich
2002-02-04 10:30 forsyth
2002-02-03 21:53 presotto
2002-02-03 22:36 ` Andrew Simmons
2002-02-03 21:21 rob pike
2002-02-04 21:46 ` skipt
2002-02-04 22:11 ` Ronald G Minnich
[not found] ` <Pine.LNX.4.33.0202041510540.4327-100000@snaresland.acl.lan l.gov>
2002-02-05 1:30 ` skipt
2002-02-05 15:32 ` Ronald G Minnich
2002-02-03 21:12 andrey mirtchovski
2002-02-03 21:01 Andrew Simmons
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