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From: Robert Dewar <robert_dewar@my-deja.com>
Subject: Re: Y21C Bug
Date: 2000/01/06
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In article <851j2q$78q1@ftp.kvaerner.com>,
  "Tarjei T. Jensen" <tarjei.jensen@kvaerner.com> wrote:
> Anything else would be madness. 32-bit CPUs will have more
> than enough computing power for many if not most applications
> in the foreseeable future.


Well I guess you think all the world is mad then because
everyone (including Intel and AMD) see the future in 64-bit
computing.

Computing "power" is not the issue here. The point is that
a lot of modern applications can benefit from an expanded
address space. We are not talking about future versions of
Microsoft WORD requiring more than 4 gigabytes of code,
rather 64-bit addressing provides two very valuable features.

1. The ability to declare very large areas of memory with
commit-on-use semantics. There are many uses of this. I have
the feeling that a lot of programmers still don't understand
commit-on-use. FOr example, it is fine in many environments
to declare huge numbers of tasks with enormous stacks, and
if you are in 64-bit mode there are simply no limitations on
this approach. Of course if you USE all this stack space you
will thrash etc.

2. The ability to map file systems into virtual memory.


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