EXPERIMENTAL: sched/fair: change load balance utilization checks

Patch is less conservative in load balance target switch decision.
The workload is more spreaded and there is no idle cpu when
system is fully loaded.

Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 815fab24aa4c23d9c1ec5bae3b1e3c7d77582253..cdd3fc19b8f8b8a73516a58a2e551b72e7b16313 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -8735,11 +8735,7 @@ static inline int need_park_into_spare_capacity(struct lb_env *env)
                                                cpu_util(env->src_cpu) / 2);
        int ret;
 
-       if ((capacity_of(env->src_cpu) < capacity_of(env->dst_cpu)) &&
-                               env->src_rq->cfs.h_nr_running == 1 &&
-                               cpu_overutilized(env->src_cpu) &&
-                               !cpu_overutilized(env->dst_cpu) &&
-                               (fits_in || check_cpu_lite_util(env->dst_cpu))) {
+       if (fits_in || check_cpu_lite_util(env->dst_cpu)) {
                ret = 1;
        } else {
                ret = 0;