Regarding your edit: https://wiki.archlinux.org/index.php?title=PCI_passthrough_via_OVMF&diff=next&oldid=650336 Avoid double negatives when constructing sentences if possible. The sentence was a bit confusing to read, so I went ahead and cleaned it up to the best of my ability. I'm not a native English speaker, so I might have misunderstood your original sentence. If I did please feel free to edit it appropriately (but be a bit more descriptive of what you write, for instance "vm memory" is less descriptive than "page cache").
Thank you :)