Set the effective priority of idleprio tasks to that of nice 19 tasks when
modifying vm reclaim behaviour.

-ck

---
 include/linux/sched.h |    2 +-
 mm/vmscan.c           |    2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

Index: linux-3.4-ck3/include/linux/sched.h
===================================================================
--- linux-3.4-ck3.orig/include/linux/sched.h	2012-07-03 14:00:08.123680821 +1000
+++ linux-3.4-ck3/include/linux/sched.h	2012-07-03 14:00:42.606326914 +1000
@@ -39,9 +39,9 @@
 #define SCHED_BATCH		3
 /* SCHED_ISO: Implemented on BFS only */
 #define SCHED_IDLE		5
+#define SCHED_IDLEPRIO		SCHED_IDLE
 #ifdef CONFIG_SCHED_BFS
 #define SCHED_ISO		4
-#define SCHED_IDLEPRIO		SCHED_IDLE
 #define SCHED_MAX		(SCHED_IDLEPRIO)
 #define SCHED_RANGE(policy)	((policy) <= SCHED_MAX)
 #endif
Index: linux-3.4-ck3/mm/vmscan.c
===================================================================
--- linux-3.4-ck3.orig/mm/vmscan.c	2012-07-03 14:00:42.423323482 +1000
+++ linux-3.4-ck3/mm/vmscan.c	2012-07-03 14:00:42.607326933 +1000
@@ -2219,6 +2219,8 @@ static inline int effective_sc_prio(stru
 	if (likely(p->mm)) {
 		if (rt_task(p))
 			return -20;
+		if (p->policy == SCHED_IDLEPRIO)
+			return 19;
 		return task_nice(p);
 	}
 	return 0;