[creer]

It's fine that "many systems" can. But there is no easy way when the user or system can't. Flushing back to RAM is slow - that's not controversial. So it would help if there was a way to do this in advance of the need for the programs where that matters.

[aeonik]

You mean like vmtouch and madvise?

I use vmtouch all the time to preload or even lock certain data/code into RAM.