[Pmem] Re: [Pmem PATCH] memory tiering: fix promote_success count when thp numa fault work

Currently, promote_success just include the normal page count when it is migrated from pmem node to toptier node, but an huge page also can trigger the same operation when thp numa fault work. hence it miss the count in migrate_misplaced_transhuge_page. Signed-off-by: zhongjiang-ali <zhongjiang-ali(a)linux.alibaba.com>

--- mm/migrate.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/migrate.c b/mm/migrate.c index e9adaa7..9d6cac9 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2138,7 +2138,7 @@ int migrate_misplaced_page(struct page *page, struct vm_area_struct *vma, if (nr_succeeded) { count_vm_numa_events(NUMA_PAGE_MIGRATE, nr_succeeded); if (!node_is_toptier(page_to_nid(page)) && node_is_toptier(node)) - mod_node_page_state(NODE_DATA(node), PGPROMOTE_SUCCESS, + mod_node_page_state(pgdat, PGPROMOTE_SUCCESS, nr_succeeded); } BUG_ON(!list_empty(&migratepages)); @@ -2264,6 +2264,9 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm, count_vm_events(PGMIGRATE_SUCCESS, HPAGE_PMD_NR); count_vm_numa_events(NUMA_PAGE_MIGRATE, HPAGE_PMD_NR); + if (!node_is_toptier(page_to_nid(page)) && node_is_toptier(node)) + mod_node_page_state(pgdat, PGPROMOTE_SUCCESS, + HPAGE_PMD_NR); mod_node_page_state(page_pgdat(page), NR_ISOLATED_ANON + page_lru,