From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
If the filesystem supports THPs, then do not split them before
removing them from the page cache; remove them as a unit.
---
mm/vmscan.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 17934e03b3aa..0db62c1001f7 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1277,9 +1277,9 @@ static unsigned int shrink_page_list(struct list_head *page_list,
/* Adding to swap updated mapping */
mapping = page_mapping(page);
}
- } else if (unlikely(PageTransHuge(page))) {
- /* Split file THP */
- if (split_huge_page_to_list(page, page_list))
+ } else if (PageTransHuge(page)) {
+ if ((!mapping || !mapping_thp_support(mapping)) &&
+ split_huge_page_to_list(page, page_list))
goto keep_locked;
}
--
2.26.2
