1 files changed, 7 insertions, 3 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 788ecce1e0e4..ec7fd9cee306 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3850,6 +3850,10 @@ do_sched_setscheduler(pid_t pid, int policy, struct sched_param __user *param)
 asmlinkage long sys_sched_setscheduler(pid_t pid, int policy,
                                        struct sched_param __user *param)
 {
+        /* negative values for policy are not valid */
+        if (policy < 0)
+                return -EINVAL;
+
         return do_sched_setscheduler(pid, policy, param);
 }
 
@@ -5137,7 +5141,7 @@ static void init_sched_build_groups(struct sched_group groups[], cpumask_t span,
 #define SEARCH_SCOPE            2
 #define MIN_CACHE_SIZE          (64*1024U)
 #define DEFAULT_CACHE_SIZE      (5*1024*1024U)
-#define ITERATIONS              2
+#define ITERATIONS              1
 #define SIZE_THRESH             130
 #define COST_THRESH             130
 
@@ -5476,9 +5480,9 @@ static unsigned long long measure_migration_cost(int cpu1, int cpu2)
                                 break;
                         }
                 /*
-                 * Increase the cachesize in 5% steps:
+                 * Increase the cachesize in 10% steps:
                  */
-                size = size * 20 / 19;
+                size = size * 10 / 9;
         }
 
         if (migration_debug)