1 files changed, 8 insertions, 2 deletions
diff --git a/mm/truncate.c b/mm/truncate.c
index 6479ed2afc53..2330223841fb 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -530,9 +530,15 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping,
 			} else if (PageTransHuge(page)) {
 				index += HPAGE_PMD_NR - 1;
 				i += HPAGE_PMD_NR - 1;
-				/* 'end' is in the middle of THP */
-				if (index ==  round_down(end, HPAGE_PMD_NR))
+				/*
+				 * 'end' is in the middle of THP. Don't
+				 * invalidate the page as the part outside of
+				 * 'end' could be still useful.
+				 */
+				if (index > end) {
+					unlock_page(page);
 					continue;
+				}
 			}
 
 			ret = invalidate_inode_page(page);