Mel Gorman wrote:

With Erics patch and libhugetlbfs, we can automatically back text/data[1],
malloc[2] and stacks without source modification. Fairly soon, libhugetlbfs
will also be able to override shmget() to add SHM_HUGETLB. That should cover
a lot of the memory-intensive apps without source modification.

So we are quite far down the road to having a VM that supports 2 page sizes 4k and 2M?