diff --git a/mm/vmscan.c b/mm/vmscan.c index 7a2f25b904d9..8b17e46dbf32 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1470,8 +1470,8 @@ 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 */ + } else if (PageSwapBacked(page) && PageTransHuge(page)) { + /* Split shmem THP */ if (split_huge_page_to_list(page, page_list)) goto keep_locked; }
We have to allocate memory in order to split a file-backed page, so it's not a good idea to split them. It also doesn't work for XFS because pages have an extra reference count from page_has_private() and split_huge_page() expects that reference to have already been removed. Unfortunately, we still have to split shmem THPs because we can't handle swapping out an entire THP yet. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- mm/vmscan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)