sched/fair: Remove the force parameter of update_tg_load_avg()

In the file fair.c, sometims update_tg_load_avg(cfs_rq, 0) is used,
sometimes update_tg_load_avg(cfs_rq, false) is used.
update_tg_load_avg() has the parameter force, but in current code,
it never set 1 or true to it, so remove the force parameter.

Signed-off-by: Xianting Tian <tian.xianting@h3c.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200924014755.36253-1-tian.xianting@h3c.com

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 9613e5d..b56276a 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -831,7 +831,7 @@ void init_entity_runnable_average(struct sched_entity *se)
 void post_init_entity_util_avg(struct task_struct *p)
 {
 }
-static void update_tg_load_avg(struct cfs_rq *cfs_rq, int force)
+static void update_tg_load_avg(struct cfs_rq *cfs_rq)
 {
 }
 #endif /* CONFIG_SMP */
@@ -3293,7 +3293,6 @@ static inline void cfs_rq_util_change(struct cfs_rq *cfs_rq, int flags)
 /**
  * update_tg_load_avg - update the tg's load avg
  * @cfs_rq: the cfs_rq whose avg changed
- * @force: update regardless of how small the difference
  *
  * This function 'ensures': tg->load_avg := \Sum tg->cfs_rq[]->avg.load.
  * However, because tg->load_avg is a global value there are performance
@@ -3305,7 +3304,7 @@ static inline void cfs_rq_util_change(struct cfs_rq *cfs_rq, int flags)
  *
  * Updating tg's load_avg is necessary before update_cfs_share().
  */
-static inline void update_tg_load_avg(struct cfs_rq *cfs_rq, int force)
+static inline void update_tg_load_avg(struct cfs_rq *cfs_rq)
 {
        long delta = cfs_rq->avg.load_avg - cfs_rq->tg_load_avg_contrib;
 
@@ -3315,7 +3314,7 @@ static inline void update_tg_load_avg(struct cfs_rq *cfs_rq, int force)
        if (cfs_rq->tg == &root_task_group)
                return;
 
-       if (force || abs(delta) > cfs_rq->tg_load_avg_contrib / 64) {
+       if (abs(delta) > cfs_rq->tg_load_avg_contrib / 64) {
                atomic_long_add(delta, &cfs_rq->tg->load_avg);
                cfs_rq->tg_load_avg_contrib = cfs_rq->avg.load_avg;
        }
@@ -3617,7 +3616,7 @@ static inline bool skip_blocked_update(struct sched_entity *se)
 
 #else /* CONFIG_FAIR_GROUP_SCHED */
 
-static inline void update_tg_load_avg(struct cfs_rq *cfs_rq, int force) {}
+static inline void update_tg_load_avg(struct cfs_rq *cfs_rq) {}
 
 static inline int propagate_entity_load_avg(struct sched_entity *se)
 {
@@ -3805,13 +3804,13 @@ static inline void update_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *s
                 * IOW we're enqueueing a task on a new CPU.
                 */
                attach_entity_load_avg(cfs_rq, se);
-               update_tg_load_avg(cfs_rq, 0);
+               update_tg_load_avg(cfs_rq);
 
        } else if (decayed) {
                cfs_rq_util_change(cfs_rq, 0);
 
                if (flags & UPDATE_TG)
-                       update_tg_load_avg(cfs_rq, 0);
+                       update_tg_load_avg(cfs_rq);
        }
 }
 
@@ -7898,7 +7897,7 @@ static bool __update_blocked_fair(struct rq *rq, bool *done)
                struct sched_entity *se;
 
                if (update_cfs_rq_load_avg(cfs_rq_clock_pelt(cfs_rq), cfs_rq)) {
-                       update_tg_load_avg(cfs_rq, 0);
+                       update_tg_load_avg(cfs_rq);
 
                        if (cfs_rq == &rq->cfs)
                                decayed = true;
@@ -10797,7 +10796,7 @@ static void detach_entity_cfs_rq(struct sched_entity *se)
        /* Catch up with the cfs_rq and remove our load when we leave */
        update_load_avg(cfs_rq, se, 0);
        detach_entity_load_avg(cfs_rq, se);
-       update_tg_load_avg(cfs_rq, false);
+       update_tg_load_avg(cfs_rq);
        propagate_entity_cfs_rq(se);
 }
 
@@ -10816,7 +10815,7 @@ static void attach_entity_cfs_rq(struct sched_entity *se)
        /* Synchronize entity with its cfs_rq */
        update_load_avg(cfs_rq, se, sched_feat(ATTACH_AGE_LOAD) ? 0 : SKIP_AGE_LOAD);
        attach_entity_load_avg(cfs_rq, se);
-       update_tg_load_avg(cfs_rq, false);
+       update_tg_load_avg(cfs_rq);
        propagate_entity_cfs_rq(se);
 }