Re: [LSF/MM ATTEND] Huge Page Futures

Mike Kravetz [off-list ref] writes:

In a search of the archives, it appears huge page support in one form or
another has been a discussion topic in almost every LSF/MM gathering. Based
on patches submitted this past year, huge pages is still an area of active
development.  And, it appears this level of activity will  continue in the
coming year.

I propose a "Huge Page Futures" session to discuss large works in progress
as well as work people are considering for 2016.  Areas of discussion would
minimally include:

- Krill Shutemov's THP new refcounting code and the push for huge page
  support in the page cache.

I am also interested in this discussion. We had some nice challenge
w.r.t to powerpc implementation of THP.

- Matt Wilcox's huge page support in DAX enabled filesystems, but perhaps
  more interesting is the desire for supporting PUD pages.  This seems to
  beg the question of supporting transparent PUD pages elsewhere.

I am also looking at switching powerpc hugetlbfs to GENERAL_HUGETLB. To
support 16GB pages I would need hugepage at PUD/PGD. Can you elaborate
why supporting huge PUD page is a challenge ?

-aneesh

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