Date:	Tue, 22 Jul 1997 01:37:37 -0600
From:	Esa Peuha <Esa DOT Peuha AT helsinki DOT fi>
Subject:	Re: mem alloc taking up power of 2
Newsgroups:	comp.os.msdos.djgpp
Message-ID:	<869552497.24200@dejanews.com>
Organization:	Deja News Posting Service
References:	<33cc4f06 DOT 4823733 AT 192 DOT 189 DOT 54 DOT 145> <vlnYdGAm+QzzEwqo AT talula DOT demon DOT co DOT uk>
Lines:	19
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

In article <vlnYdGAm+QzzEwqo AT talula DOT demon DOT co DOT uk>,
  Shawn Hargreaves <Shawn AT talula DOT demon DOT co DOT uk> wrote:
> When you say that you are losing
> 640k, remember that this is virtual memory, so if you never touch the
> space the DPMI server won't actually bother to allocate any hardware
> pages for it.

True, but it must still allocate enough _disk space_ for it. The DPMI
host can't know that you'll never touch that memory, and it must be able
to page it in physical RAM if you do.

> The only thing being wasted is a few meg of your 32 bit
> linear address space, but there's plenty of that to go around :-)

Disk space (in the swap file) is also being wasted, and this may be a
problem.

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