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

-ck

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

Index: linux-3.9-ck1/mm/vmscan.c
===================================================================
--- linux-3.9-ck1.orig/mm/vmscan.c	2013-05-03 21:51:30.279929416 +1000
+++ linux-3.9-ck1/mm/vmscan.c	2013-05-03 21:51:30.737923690 +1000
@@ -2037,6 +2037,8 @@ 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;
Index: linux-3.9-ck1/include/uapi/linux/sched.h
===================================================================
--- linux-3.9-ck1.orig/include/uapi/linux/sched.h	2013-05-03 21:50:48.204455431 +1000
+++ linux-3.9-ck1/include/uapi/linux/sched.h	2013-05-03 21:51:30.737923690 +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