On Thu, 5 Feb 2004, Lindgren, Jon wrote:

> Quick q: I'm tounge tied and can't remember the term used to describe the
> behavior of a VM which doesn't swap mmap'd files into "usual" swap, but
> simply discards the page and reloads it from the actual mmap'd file.

Um...don't all VM's do this? It would be the easiest way to do mmap.
(Otherwise, if someone tries to read or write that page of the file
using "regular" I/O calls, the system would have to know that it needs
to pull that page from the swap rather than from the file itself.
Keeping the extra copy is harder, not easier!)

cjs
-- 
Curt Sampson  <cjs@cynic.net>   +81 90 7737 2974   http://www.NetBSD.org
    Don't you know, in this new Dark Age, we're all light.  --XTC