1 files changed, 4 insertions, 2 deletions

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index eb59f7eea508..7e39ffceb566 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -41,6 +41,8 @@
 
 #include "internal.h"
 
+#include <litmus/litmus.h> /* for is_realtime() */
+
 /*
  * Sleep at most 200ms at a time in balance_dirty_pages().
  */
@@ -279,7 +281,7 @@ void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty)
         if (background >= dirty)
                 background = dirty / 2;
         tsk = current;
-        if (tsk->flags & PF_LESS_THROTTLE || rt_task(tsk)) {
+        if (tsk->flags & PF_LESS_THROTTLE || rt_task(tsk) || is_realtime(tsk)) {
                 background += background / 4;
                 dirty += dirty / 4;
         }
@@ -307,7 +309,7 @@ static unsigned long zone_dirty_limit(struct zone *zone)
         else
                 dirty = vm_dirty_ratio * zone_memory / 100;
 
-        if (tsk->flags & PF_LESS_THROTTLE || rt_task(tsk))
+        if (tsk->flags & PF_LESS_THROTTLE || rt_task(tsk) || is_realtime(tsk))
                 dirty += dirty / 4;
 
         return dirty;