1 files changed, 7 insertions, 0 deletions

diff --git a/mm/swap.c b/mm/swap.c
index 5602f1a1b1e7..2f365d1a4bb2 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -476,6 +476,13 @@ static void drain_cpu_pagevecs(int cpu)
  */
 void deactivate_page(struct page *page)
 {
+        /*
+         * In a workload with many unevictable page such as mprotect, unevictable
+         * page deactivation for accelerating reclaim is pointless.
+         */
+        if (PageUnevictable(page))
+                return;
+
         if (likely(get_page_unless_zero(page))) {
                 struct pagevec *pvec = &get_cpu_var(lru_deactivate_pvecs);