1M hugepage size being registered on Linux

[Michael Ellerman]

Benjamin Herrenschmidt <benh at au1.ibm.com> writes:

> 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 ?

Because hostboot said so AIUI.

cheers