On 02/19/2019 04:43 AM, Yu Zhao wrote: > For pte page, use pgtable_page_ctor(); for pmd page, use > pgtable_pmd_page_ctor() if not folded; and for the rest (pud, > p4d and pgd), don't use any. pgtable_page_ctor()/dtor() is not optional for any level page table page as it determines the struct page state and zone statistics. We should not skip it for any page table page. As stated before pgtable_pmd_page_ctor() is not a replacement for pgtable_page_ctor().
