On Mon, 13 Apr 2020 15:52:18 +0300 "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> wrote:
> We can collapse PTE-mapped compound pages. We only need to avoid
> handling them more than once: lock/unlock page only once if it's present
> in the PMD range multiple times as it handled on compound level. The
> same goes for LRU isolation and putback.
>
> ...
>
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -515,17 +515,30 @@ void __khugepaged_exit(struct mm_struct *mm)
>
> static void release_pte_page(struct page *page)
> {
> - dec_node_page_state(page, NR_ISOLATED_ANON + page_is_file_cache(page));
I have
dec_node_page_state(page, NR_ISOLATED_ANON + page_is_file_lru(page));
here. Is there some prerequisite which I wasn't able to find?
