In order to support shmem mTHP collapse in the following patches, add an PMD-sized THP order check to avoid PMD-sized THP statistics errors.
No functional changes. Signed-off-by: Baolin Wang <[email protected]> --- mm/khugepaged.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 4adc8c6de062..0c8dfbd48410 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -2595,8 +2595,9 @@ static enum scan_result collapse_file(struct mm_struct *mm, unsigned long addr, if (is_shmem) { lruvec_stat_mod_folio(new_folio, NR_SHMEM, nr_pages); - lruvec_stat_mod_folio(new_folio, NR_SHMEM_THPS, HPAGE_PMD_NR); - } else { + if (is_pmd_order(order)) + lruvec_stat_mod_folio(new_folio, NR_SHMEM_THPS, HPAGE_PMD_NR); + } else if (is_pmd_order(order)) { lruvec_stat_mod_folio(new_folio, NR_FILE_THPS, HPAGE_PMD_NR); } lruvec_stat_mod_folio(new_folio, NR_FILE_PAGES, nr_pages); -- 2.47.3
