> large 2MB and 1GB __cannot__ be paged. Even without what marcan_42 said, this is still false: a 2MB page is made of 512 4KB pages; page one of those out and

> large 2MB and 1GB __cannot__ be paged. Even without what marcan_42 said, this is still false: a 2MB page is made of 512 4KB pages; page one of those out and use the freed memory as a page table for the other 511 (then page those out individually). If you have a contiguous, aligned 2MB block, defragment physical memory and fuse it into a huge page. It may very well be the case that linux chooses not to support this, and that's plausibly the correct decision, but it's not remotely impossible.