On Oct 10, 2006, at 10:24 AM, Justin C. Walker wrote:
On Oct 10, 2006, at 10:10 , Alison Cassidy wrote:
Does anyone know if there is a programmatic way of switching VM
on and off, similar to the way Linux does it? I've good reason to
do this (honest!) and need some way to disable VM for the duration
of running my app or at the least, ensure it doesn't flush to disk
at the wrong moment.
AFAIK, no OS that supports VM has such a feature. How would you
deal, within your app, with this problem: you are running, you
"turn off VM", the next instruction to be executed in your app lies
at the start of a page that, oops, is paged out?
Fair point. However, I'm assuming the kernel memory management will
deal accordingly in some sane manner. See; http://unixhelp.ed.ac.uk/
CGI/man-cgi?swapoff+2
There may be more reasonable ways to solve your problem. Can you
be more specific about what you are trying to do?
I'm trying to quiet disk activity. If I could suspend the OS File
Manager temporarily, I would do so :) Right now, I'm even running a
separate pthread to sync() on a very regular basis to ensure that the
kernel doesn't build up too many dirty blocks which it would
otherwise flush in a flurry of disk activity. I'm doing some very
strange things indeed!
-- Allie
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