[v2 PATCH 4/7] mm: migrate: account THP NUMA migration counters correctly

[Yang Shi]

Now both base page and THP NUMA migration is done via migrate_misplaced_page(),
keep the counters correctly for THP.

Signed-off-by: Yang Shi <shy828...@gmail.com>
---
 mm/migrate.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 333448aa53f1..a473f25fbd01 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2111,6 +2111,7 @@ int migrate_misplaced_page(struct page *page, struct 
vm_area_struct *vma,
        LIST_HEAD(migratepages);
        new_page_t *new;
        bool compound;
+       unsigned int nr_pages = thp_nr_pages(page);
 
        /*
         * PTE mapped THP or HugeTLB page can't reach here so the page could
@@ -2149,13 +2150,13 @@ int migrate_misplaced_page(struct page *page, struct 
vm_area_struct *vma,
        if (nr_remaining) {
                if (!list_empty(&migratepages)) {
                        list_del(&page->lru);
-                       dec_node_page_state(page, NR_ISOLATED_ANON +
-                                       page_is_file_lru(page));
+                       mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON +
+                                       page_is_file_lru(page), -nr_pages);
                        putback_lru_page(page);
                }
                isolated = 0;
        } else
-               count_vm_numa_event(NUMA_PAGE_MIGRATE);
+               count_vm_numa_events(NUMA_PAGE_MIGRATE, nr_pages);
        BUG_ON(!list_empty(&migratepages));
        return isolated;
 
-- 
2.26.2