If THP is failed to be migrated for -ENOSYS and -ENOMEM, the THP will be split into thp_split_pages, and after other pages are migrated, pages in thp_split_pages will be migrated with no_subpage_counting == true, because its failure have been counted already. If some pages in thp_split_pages are retried during migration, we should not count their failure if no_subpage_counting == true too. This is done this patch to fix the failure counting for THP subpages retrying. Signed-off-by: "Huang, Ying" <ying.huang@xxxxxxxxx> Fixes: 5984fabb6e82 ("mm: move_pages: report the number of non-attempted pages") Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx> Cc: Zi Yan <ziy@xxxxxxxxxx> Cc: Yang Shi <shy828301@xxxxxxxxx> --- mm/migrate.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/migrate.c b/mm/migrate.c index 38e2c789a9c3..4bceba143db0 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1477,7 +1477,8 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page, } } } - nr_failed += retry; + if (!no_subpage_counting) + nr_failed += retry; nr_thp_failed += thp_retry; /* * Try to migrate subpages of fail-to-migrate THPs, no nr_failed -- 2.30.2