On Sat, 25 Jan 2020 18:05:05 +0000
Pancho  wrote:

> Apologies if my terminology isn't quite correct, I did used to know the
> basics of virtual memory for VMS but that was some decades ago. I don't
> think I've ever read a good description of how linux (or unix) handles
> it. Can anyone recommend a good technical overview of the subject, if
> such a thing exists.

 The FreeBSD memory management system is well described here:

https://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handbook/vm.html

 I gather it is similar in principle, but different in detail, to
the Linux mechanism.

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