On Mon 05-12-16 17:17:07, Huang Shijie wrote:
[...]

   The failure is caused by:
    1) kernel fails to allocate a gigantic page for the surplus case.
       And the gather_surplus_pages() will return NULL in the end.

    2) The condition checks for some functions are wrong:
        return_unused_surplus_pages()
        nr_overcommit_hugepages_store()
        hugetlb_overcommit_handler()

OK, so how is this any different from gigantic (1G) hugetlb pages on
x86_64? Do we need the same functionality or is it just 32MB not being
handled in the same way as 1G?

Thanks!
-- 
Michal Hocko
SUSE Labs