On Thu, Aug 5, 2021 at 8:06 AM Baolin Wang
<baolin.wang@xxxxxxxxxxxxxxxxx> wrote:
>
> Use thp_nr_pages() instead of compound_nr() to get the number of pages
> for THP page, meanwhile introducing a local variable 'nr_pages' to
> avoid getting the number of pages repeatedly.
>
> Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
Reviewed-by: Yang Shi <shy828301@xxxxxxxxx>
> ---
> mm/migrate.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/mm/migrate.c b/mm/migrate.c
> index 5559571..eeba4c6 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -2106,6 +2106,7 @@ static struct page *alloc_misplaced_dst_page_thp(struct page *page,
> static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
> {
> int page_lru;
> + int nr_pages = thp_nr_pages(page);
>
> VM_BUG_ON_PAGE(compound_order(page) && !PageTransHuge(page), page);
>
> @@ -2114,7 +2115,7 @@ static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
> return 0;
>
> /* Avoid migrating to a node that is nearly full */
> - if (!migrate_balanced_pgdat(pgdat, compound_nr(page)))
> + if (!migrate_balanced_pgdat(pgdat, nr_pages))
> return 0;
>
> if (isolate_lru_page(page))
> @@ -2122,7 +2123,7 @@ static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
>
> page_lru = page_is_file_lru(page);
> mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON + page_lru,
> - thp_nr_pages(page));
> + nr_pages);
>
> /*
> * Isolating the page has taken another reference, so the
> --
> 1.8.3.1
>
>
