Allow reserve disk space to RAM and VRAM

[LuisKawaiiNeko]

Hi, I just wondered how fast could work virtual machines if it had an option to reserve an part of your hard drive to simulate it as RAM and VRAM. That would allow users with low end PC to make virtualization faster. It could be used even to make a virtual machine that works better than the host key. I dont know how i would do it but i really think that its possible.

[mpack]

A modern guest OS already has that feature (paged RAM), so there is no need for VirtualBox to provide it.

And it would be incredibly slow to rely heavily on paged RAM. In some cases it would not work at all, e.g. if you tried to use paged RAM as kernel memory. The latency would kill many interrupt handlers.