1M hugepage size being registered on Linux

[Benjamin Herrenschmidt]

On Thu, 2017-06-22 at 13:59 +1000, Michael Ellerman wrote:
> It's unsupported in Linux because it doesn't match the page table
> geometry.
> 
> We merged a patch from Aneesh to filter it out in 4.12-rc1:
> 
>   a525108cf1cc ("powerpc/mm/hugetlb: Filter out hugepage size not supported by page table layout")
> 
> I guess we should probably send that patch to stable et. al.

It's also not supported in HW afaik, why is it there ?

Cheers,
Ben.