In order to support file/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 <baolin.wang@linux.alibaba.com>
---
mm/khugepaged.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index e64ed86d28ca..195c26699118 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -2411,10 +2411,12 @@ static int collapse_file(struct mm_struct *mm, unsigned long addr,
xas_lock_irq(&xas);
}
- if (is_shmem)
- __lruvec_stat_mod_folio(new_folio, NR_SHMEM_THPS, HPAGE_PMD_NR);
- else
- __lruvec_stat_mod_folio(new_folio, NR_FILE_THPS, HPAGE_PMD_NR);
+ if (order == HPAGE_PMD_ORDER) {
+ if (is_shmem)
+ __lruvec_stat_mod_folio(new_folio, NR_SHMEM_THPS, HPAGE_PMD_NR);
+ else
+ __lruvec_stat_mod_folio(new_folio, NR_FILE_THPS, HPAGE_PMD_NR);
+ }
if (nr_none) {
__lruvec_stat_mod_folio(new_folio, NR_FILE_PAGES, nr_none);
--
2.43.5