Re: [RFC] Arch option to touch newly allocated pages

[Alan Cox]

> Note that this doesn't help when the UMLs are under a smaller limit than 
> RAM + .5 * swap or whatever as happens when they are mmapping from tmpfs.
> That's the situation that I'm concerned about.

Making tmpfs enforce the policy in those modes both checking the global
overcommit and also enforcing a "must be able to fill in the pages between
start and end of file" for the tmpfs file size itself is not hard from
inspection. If its needed I can add that next update to the address
accounting.