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-rw-r--r--mm/rmap.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index 746013e282c3..0e83c3be8568 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1442,8 +1442,9 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
*/
if (!(flags & TTU_IGNORE_MLOCK)) {
if (vma->vm_flags & VM_LOCKED) {
- /* PTE-mapped THP are never mlocked */
- if (!PageTransCompound(page)) {
+ /* PTE-mapped THP are never marked as mlocked */
+ if (!PageTransCompound(page) ||
+ (PageHead(page) && !PageDoubleMap(page))) {
/*
* Holding pte lock, we do *not* need
* mmap_lock here
@@ -1984,9 +1985,11 @@ static bool page_mlock_one(struct page *page, struct vm_area_struct *vma,
* munlock_vma_pages_range().
*/
if (vma->vm_flags & VM_LOCKED) {
- /* PTE-mapped THP are never mlocked */
- if (!PageTransCompound(page))
- mlock_vma_page(page);
+ /*
+ * PTE-mapped THP are never marked as mlocked, but
+ * this function is never called when PageDoubleMap().
+ */
+ mlock_vma_page(page);
page_vma_mapped_walk_done(&pvmw);
}