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Subject[PATCH v2 3/5] sched/pelt: Remove unused runnable load average
Date
Now that runnable_load_avg is no more used, we can remove it to make
space for a new signal.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
include/linux/sched.h | 5 +-
kernel/sched/core.c | 2 -
kernel/sched/debug.c | 8 ---
kernel/sched/fair.c | 136 +++++-------------------------------------
kernel/sched/pelt.c | 62 ++++++++-----------
kernel/sched/sched.h | 7 +--
6 files changed, 41 insertions(+), 179 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 467d26046416..f1cab3df8386 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -357,7 +357,7 @@ struct util_est {

/*
* The load_avg/util_avg accumulates an infinite geometric series
- * (see __update_load_avg() in kernel/sched/fair.c).
+ * (see __update_load_avg_cfs_rq() in kernel/sched/pelt.c).
*
* [load_avg definition]
*
@@ -401,11 +401,9 @@ struct util_est {
struct sched_avg {
u64 last_update_time;
u64 load_sum;
- u64 runnable_load_sum;
u32 util_sum;
u32 period_contrib;
unsigned long load_avg;
- unsigned long runnable_load_avg;
unsigned long util_avg;
struct util_est util_est;
} ____cacheline_aligned;
@@ -449,7 +447,6 @@ struct sched_statistics {
struct sched_entity {
/* For load-balancing: */
struct load_weight load;
- unsigned long runnable_weight;
struct rb_node run_node;
struct list_head group_node;
unsigned int on_rq;
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 377ec26e9159..6bd7686c8dc2 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -761,7 +761,6 @@ static void set_load_weight(struct task_struct *p, bool update_load)
if (task_has_idle_policy(p)) {
load->weight = scale_load(WEIGHT_IDLEPRIO);
load->inv_weight = WMULT_IDLEPRIO;
- p->se.runnable_weight = load->weight;
return;
}

@@ -774,7 +773,6 @@ static void set_load_weight(struct task_struct *p, bool update_load)
} else {
load->weight = scale_load(sched_prio_to_weight[prio]);
load->inv_weight = sched_prio_to_wmult[prio];
- p->se.runnable_weight = load->weight;
}
}

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 879d3ccf3806..cfecaad387c0 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -402,11 +402,9 @@ static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group
}

P(se->load.weight);
- P(se->runnable_weight);
#ifdef CONFIG_SMP
P(se->avg.load_avg);
P(se->avg.util_avg);
- P(se->avg.runnable_load_avg);
#endif

#undef PN_SCHEDSTAT
@@ -524,11 +522,8 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
SEQ_printf(m, " .%-30s: %d\n", "nr_running", cfs_rq->nr_running);
SEQ_printf(m, " .%-30s: %ld\n", "load", cfs_rq->load.weight);
#ifdef CONFIG_SMP
- SEQ_printf(m, " .%-30s: %ld\n", "runnable_weight", cfs_rq->runnable_weight);
SEQ_printf(m, " .%-30s: %lu\n", "load_avg",
cfs_rq->avg.load_avg);
- SEQ_printf(m, " .%-30s: %lu\n", "runnable_load_avg",
- cfs_rq->avg.runnable_load_avg);
SEQ_printf(m, " .%-30s: %lu\n", "util_avg",
cfs_rq->avg.util_avg);
SEQ_printf(m, " .%-30s: %u\n", "util_est_enqueued",
@@ -947,13 +942,10 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
"nr_involuntary_switches", (long long)p->nivcsw);

P(se.load.weight);
- P(se.runnable_weight);
#ifdef CONFIG_SMP
P(se.avg.load_sum);
- P(se.avg.runnable_load_sum);
P(se.avg.util_sum);
P(se.avg.load_avg);
- P(se.avg.runnable_load_avg);
P(se.avg.util_avg);
P(se.avg.last_update_time);
P(se.avg.util_est.ewma);
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 12266b248f52..a23110ad96e8 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -741,9 +741,7 @@ void init_entity_runnable_average(struct sched_entity *se)
* nothing has been attached to the task group yet.
*/
if (entity_is_task(se))
- sa->runnable_load_avg = sa->load_avg = scale_load_down(se->load.weight);
-
- se->runnable_weight = se->load.weight;
+ sa->load_avg = scale_load_down(se->load.weight);

/* when this task enqueue'ed, it will contribute to its cfs_rq's load_avg */
}
@@ -2877,25 +2875,6 @@ account_entity_dequeue(struct cfs_rq *cfs_rq, struct sched_entity *se)
} while (0)

#ifdef CONFIG_SMP
-static inline void
-enqueue_runnable_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se)
-{
- cfs_rq->runnable_weight += se->runnable_weight;
-
- cfs_rq->avg.runnable_load_avg += se->avg.runnable_load_avg;
- cfs_rq->avg.runnable_load_sum += se_runnable(se) * se->avg.runnable_load_sum;
-}
-
-static inline void
-dequeue_runnable_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se)
-{
- cfs_rq->runnable_weight -= se->runnable_weight;
-
- sub_positive(&cfs_rq->avg.runnable_load_avg, se->avg.runnable_load_avg);
- sub_positive(&cfs_rq->avg.runnable_load_sum,
- se_runnable(se) * se->avg.runnable_load_sum);
-}
-
static inline void
enqueue_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
@@ -2911,28 +2890,22 @@ dequeue_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se)
}
#else
static inline void
-enqueue_runnable_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) { }
-static inline void
-dequeue_runnable_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) { }
-static inline void
enqueue_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) { }
static inline void
dequeue_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) { }
#endif

static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
- unsigned long weight, unsigned long runnable)
+ unsigned long weight)
{
if (se->on_rq) {
/* commit outstanding execution time */
if (cfs_rq->curr == se)
update_curr(cfs_rq);
account_entity_dequeue(cfs_rq, se);
- dequeue_runnable_load_avg(cfs_rq, se);
}
dequeue_load_avg(cfs_rq, se);

- se->runnable_weight = runnable;
update_load_set(&se->load, weight);

#ifdef CONFIG_SMP
@@ -2940,15 +2913,12 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
u32 divider = LOAD_AVG_MAX - 1024 + se->avg.period_contrib;

se->avg.load_avg = div_u64(se_weight(se) * se->avg.load_sum, divider);
- se->avg.runnable_load_avg =
- div_u64(se_runnable(se) * se->avg.runnable_load_sum, divider);
} while (0);
#endif

enqueue_load_avg(cfs_rq, se);
if (se->on_rq) {
account_entity_enqueue(cfs_rq, se);
- enqueue_runnable_load_avg(cfs_rq, se);
}
}

@@ -2959,7 +2929,7 @@ void reweight_task(struct task_struct *p, int prio)
struct load_weight *load = &se->load;
unsigned long weight = scale_load(sched_prio_to_weight[prio]);

- reweight_entity(cfs_rq, se, weight, weight);
+ reweight_entity(cfs_rq, se, weight);
load->inv_weight = sched_prio_to_wmult[prio];
}

@@ -3071,50 +3041,6 @@ static long calc_group_shares(struct cfs_rq *cfs_rq)
*/
return clamp_t(long, shares, MIN_SHARES, tg_shares);
}
-
-/*
- * This calculates the effective runnable weight for a group entity based on
- * the group entity weight calculated above.
- *
- * Because of the above approximation (2), our group entity weight is
- * an load_avg based ratio (3). This means that it includes blocked load and
- * does not represent the runnable weight.
- *
- * Approximate the group entity's runnable weight per ratio from the group
- * runqueue:
- *
- * grq->avg.runnable_load_avg
- * ge->runnable_weight = ge->load.weight * -------------------------- (7)
- * grq->avg.load_avg
- *
- * However, analogous to above, since the avg numbers are slow, this leads to
- * transients in the from-idle case. Instead we use:
- *
- * ge->runnable_weight = ge->load.weight *
- *
- * max(grq->avg.runnable_load_avg, grq->runnable_weight)
- * ----------------------------------------------------- (8)
- * max(grq->avg.load_avg, grq->load.weight)
- *
- * Where these max() serve both to use the 'instant' values to fix the slow
- * from-idle and avoid the /0 on to-idle, similar to (6).
- */
-static long calc_group_runnable(struct cfs_rq *cfs_rq, long shares)
-{
- long runnable, load_avg;
-
- load_avg = max(cfs_rq->avg.load_avg,
- scale_load_down(cfs_rq->load.weight));
-
- runnable = max(cfs_rq->avg.runnable_load_avg,
- scale_load_down(cfs_rq->runnable_weight));
-
- runnable *= shares;
- if (load_avg)
- runnable /= load_avg;
-
- return clamp_t(long, runnable, MIN_SHARES, shares);
-}
#endif /* CONFIG_SMP */

static inline int throttled_hierarchy(struct cfs_rq *cfs_rq);
@@ -3126,7 +3052,7 @@ static inline int throttled_hierarchy(struct cfs_rq *cfs_rq);
static void update_cfs_group(struct sched_entity *se)
{
struct cfs_rq *gcfs_rq = group_cfs_rq(se);
- long shares, runnable;
+ long shares;

if (!gcfs_rq)
return;
@@ -3135,16 +3061,15 @@ static void update_cfs_group(struct sched_entity *se)
return;

#ifndef CONFIG_SMP
- runnable = shares = READ_ONCE(gcfs_rq->tg->shares);
+ shares = READ_ONCE(gcfs_rq->tg->shares);

if (likely(se->load.weight == shares))
return;
#else
shares = calc_group_shares(gcfs_rq);
- runnable = calc_group_runnable(gcfs_rq, shares);
#endif

- reweight_entity(cfs_rq_of(se), se, shares, runnable);
+ reweight_entity(cfs_rq_of(se), se, shares);
}

#else /* CONFIG_FAIR_GROUP_SCHED */
@@ -3269,11 +3194,11 @@ void set_task_rq_fair(struct sched_entity *se,
* _IFF_ we look at the pure running and runnable sums. Because they
* represent the very same entity, just at different points in the hierarchy.
*
- * Per the above update_tg_cfs_util() is trivial and simply copies the running
- * sum over (but still wrong, because the group entity and group rq do not have
- * their PELT windows aligned).
+ * Per the above update_tg_cfs_util() is trivial * and simply copies the
+ * running sum over (but still wrong, because the group entity and group rq do
+ * not have their PELT windows aligned).
*
- * However, update_tg_cfs_runnable() is more complex. So we have:
+ * However, update_tg_cfs_load() is more complex. So we have:
*
* ge->avg.load_avg = ge->load.weight * ge->avg.runnable_avg (2)
*
@@ -3354,11 +3279,11 @@ update_tg_cfs_util(struct cfs_rq *cfs_rq, struct sched_entity *se, struct cfs_rq
}

static inline void
-update_tg_cfs_runnable(struct cfs_rq *cfs_rq, struct sched_entity *se, struct cfs_rq *gcfs_rq)
+update_tg_cfs_load(struct cfs_rq *cfs_rq, struct sched_entity *se, struct cfs_rq *gcfs_rq)
{
long delta_avg, running_sum, runnable_sum = gcfs_rq->prop_runnable_sum;
- unsigned long runnable_load_avg, load_avg;
- u64 runnable_load_sum, load_sum = 0;
+ unsigned long load_avg;
+ u64 load_sum = 0;
s64 delta_sum;

if (!runnable_sum)
@@ -3406,20 +3331,6 @@ update_tg_cfs_runnable(struct cfs_rq *cfs_rq, struct sched_entity *se, struct cf
se->avg.load_avg = load_avg;
add_positive(&cfs_rq->avg.load_avg, delta_avg);
add_positive(&cfs_rq->avg.load_sum, delta_sum);
-
- runnable_load_sum = (s64)se_runnable(se) * runnable_sum;
- runnable_load_avg = div_s64(runnable_load_sum, LOAD_AVG_MAX);
-
- if (se->on_rq) {
- delta_sum = runnable_load_sum -
- se_weight(se) * se->avg.runnable_load_sum;
- delta_avg = runnable_load_avg - se->avg.runnable_load_avg;
- add_positive(&cfs_rq->avg.runnable_load_avg, delta_avg);
- add_positive(&cfs_rq->avg.runnable_load_sum, delta_sum);
- }
-
- se->avg.runnable_load_sum = runnable_sum;
- se->avg.runnable_load_avg = runnable_load_avg;
}

static inline void add_tg_cfs_propagate(struct cfs_rq *cfs_rq, long runnable_sum)
@@ -3447,7 +3358,7 @@ static inline int propagate_entity_load_avg(struct sched_entity *se)
add_tg_cfs_propagate(cfs_rq, gcfs_rq->prop_runnable_sum);

update_tg_cfs_util(cfs_rq, se, gcfs_rq);
- update_tg_cfs_runnable(cfs_rq, se, gcfs_rq);
+ update_tg_cfs_load(cfs_rq, se, gcfs_rq);

trace_pelt_cfs_tp(cfs_rq);
trace_pelt_se_tp(se);
@@ -3592,8 +3503,6 @@ static void attach_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *s
div_u64(se->avg.load_avg * se->avg.load_sum, se_weight(se));
}

- se->avg.runnable_load_sum = se->avg.load_sum;
-
enqueue_load_avg(cfs_rq, se);
cfs_rq->avg.util_avg += se->avg.util_avg;
cfs_rq->avg.util_sum += se->avg.util_sum;
@@ -3728,11 +3637,6 @@ static void remove_entity_load_avg(struct sched_entity *se)
raw_spin_unlock_irqrestore(&cfs_rq->removed.lock, flags);
}

-static inline unsigned long cfs_rq_runnable_load_avg(struct cfs_rq *cfs_rq)
-{
- return cfs_rq->avg.runnable_load_avg;
-}
-
static inline unsigned long cfs_rq_load_avg(struct cfs_rq *cfs_rq)
{
return cfs_rq->avg.load_avg;
@@ -4059,14 +3963,12 @@ enqueue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
/*
* When enqueuing a sched_entity, we must:
* - Update loads to have both entity and cfs_rq synced with now.
- * - Add its load to cfs_rq->runnable_avg
* - For group_entity, update its weight to reflect the new share of
* its group cfs_rq
* - Add its new weight to cfs_rq->load.weight
*/
update_load_avg(cfs_rq, se, UPDATE_TG | DO_ATTACH);
update_cfs_group(se);
- enqueue_runnable_load_avg(cfs_rq, se);
account_entity_enqueue(cfs_rq, se);

if (flags & ENQUEUE_WAKEUP)
@@ -4143,13 +4045,11 @@ dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
/*
* When dequeuing a sched_entity, we must:
* - Update loads to have both entity and cfs_rq synced with now.
- * - Subtract its load from the cfs_rq->runnable_avg.
* - Subtract its previous weight from cfs_rq->load.weight.
* - For group entity, update its weight to reflect the new share
* of its group cfs_rq.
*/
update_load_avg(cfs_rq, se, UPDATE_TG);
- dequeue_runnable_load_avg(cfs_rq, se);

update_stats_dequeue(cfs_rq, se, flags);

@@ -5489,11 +5389,6 @@ static unsigned long cpu_load_without(struct rq *rq, struct task_struct *p)
return load;
}

-static unsigned long cpu_runnable_load(struct rq *rq)
-{
- return cfs_rq_runnable_load_avg(&rq->cfs);
-}
-
static unsigned long capacity_of(int cpu)
{
return cpu_rq(cpu)->cpu_capacity;
@@ -7625,9 +7520,6 @@ static inline bool cfs_rq_is_decayed(struct cfs_rq *cfs_rq)
if (cfs_rq->avg.util_sum)
return false;

- if (cfs_rq->avg.runnable_load_sum)
- return false;
-
return true;
}

diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c
index bd006b79b360..3eb0ed333dcb 100644
--- a/kernel/sched/pelt.c
+++ b/kernel/sched/pelt.c
@@ -108,7 +108,7 @@ static u32 __accumulate_pelt_segments(u64 periods, u32 d1, u32 d3)
*/
static __always_inline u32
accumulate_sum(u64 delta, struct sched_avg *sa,
- unsigned long load, unsigned long runnable, int running)
+ unsigned long load, int running)
{
u32 contrib = (u32)delta; /* p == 0 -> delta < 1024 */
u64 periods;
@@ -121,8 +121,6 @@ accumulate_sum(u64 delta, struct sched_avg *sa,
*/
if (periods) {
sa->load_sum = decay_load(sa->load_sum, periods);
- sa->runnable_load_sum =
- decay_load(sa->runnable_load_sum, periods);
sa->util_sum = decay_load((u64)(sa->util_sum), periods);

/*
@@ -148,8 +146,6 @@ accumulate_sum(u64 delta, struct sched_avg *sa,

if (load)
sa->load_sum += load * contrib;
- if (runnable)
- sa->runnable_load_sum += runnable * contrib;
if (running)
sa->util_sum += contrib << SCHED_CAPACITY_SHIFT;

@@ -186,7 +182,7 @@ accumulate_sum(u64 delta, struct sched_avg *sa,
*/
static __always_inline int
___update_load_sum(u64 now, struct sched_avg *sa,
- unsigned long load, unsigned long runnable, int running)
+ unsigned long load, int running)
{
u64 delta;

@@ -222,7 +218,7 @@ ___update_load_sum(u64 now, struct sched_avg *sa,
* Also see the comment in accumulate_sum().
*/
if (!load)
- runnable = running = 0;
+ running = 0;

/*
* Now we know we crossed measurement unit boundaries. The *_avg
@@ -231,14 +227,14 @@ ___update_load_sum(u64 now, struct sched_avg *sa,
* Step 1: accumulate *_sum since last_update_time. If we haven't
* crossed period boundaries, finish.
*/
- if (!accumulate_sum(delta, sa, load, runnable, running))
+ if (!accumulate_sum(delta, sa, load, running))
return 0;

return 1;
}

static __always_inline void
-___update_load_avg(struct sched_avg *sa, unsigned long load, unsigned long runnable)
+___update_load_avg(struct sched_avg *sa, unsigned long load)
{
u32 divider = LOAD_AVG_MAX - 1024 + sa->period_contrib;

@@ -246,7 +242,6 @@ ___update_load_avg(struct sched_avg *sa, unsigned long load, unsigned long runna
* Step 2: update *_avg.
*/
sa->load_avg = div_u64(load * sa->load_sum, divider);
- sa->runnable_load_avg = div_u64(runnable * sa->runnable_load_sum, divider);
WRITE_ONCE(sa->util_avg, sa->util_sum / divider);
}

@@ -254,17 +249,13 @@ ___update_load_avg(struct sched_avg *sa, unsigned long load, unsigned long runna
* sched_entity:
*
* task:
- * se_runnable() == se_weight()
+ * se_weight() = se->load.weight
*
* group: [ see update_cfs_group() ]
* se_weight() = tg->weight * grq->load_avg / tg->load_avg
- * se_runnable() = se_weight(se) * grq->runnable_load_avg / grq->load_avg
*
- * load_sum := runnable_sum
- * load_avg = se_weight(se) * runnable_avg
- *
- * runnable_load_sum := runnable_sum
- * runnable_load_avg = se_runnable(se) * runnable_avg
+ * load_sum := runnable
+ * load_avg = se_weight(se) * load_sum
*
* XXX collapse load_sum and runnable_load_sum
*
@@ -272,15 +263,12 @@ ___update_load_avg(struct sched_avg *sa, unsigned long load, unsigned long runna
*
* load_sum = \Sum se_weight(se) * se->avg.load_sum
* load_avg = \Sum se->avg.load_avg
- *
- * runnable_load_sum = \Sum se_runnable(se) * se->avg.runnable_load_sum
- * runnable_load_avg = \Sum se->avg.runable_load_avg
*/

int __update_load_avg_blocked_se(u64 now, struct sched_entity *se)
{
- if (___update_load_sum(now, &se->avg, 0, 0, 0)) {
- ___update_load_avg(&se->avg, se_weight(se), se_runnable(se));
+ if (___update_load_sum(now, &se->avg, 0, 0)) {
+ ___update_load_avg(&se->avg, se_weight(se));
trace_pelt_se_tp(se);
return 1;
}
@@ -290,10 +278,9 @@ int __update_load_avg_blocked_se(u64 now, struct sched_entity *se)

int __update_load_avg_se(u64 now, struct cfs_rq *cfs_rq, struct sched_entity *se)
{
- if (___update_load_sum(now, &se->avg, !!se->on_rq, !!se->on_rq,
- cfs_rq->curr == se)) {
+ if (___update_load_sum(now, &se->avg, !!se->on_rq, cfs_rq->curr == se)) {

- ___update_load_avg(&se->avg, se_weight(se), se_runnable(se));
+ ___update_load_avg(&se->avg, se_weight(se));
cfs_se_util_change(&se->avg);
trace_pelt_se_tp(se);
return 1;
@@ -306,10 +293,9 @@ int __update_load_avg_cfs_rq(u64 now, struct cfs_rq *cfs_rq)
{
if (___update_load_sum(now, &cfs_rq->avg,
scale_load_down(cfs_rq->load.weight),
- scale_load_down(cfs_rq->runnable_weight),
cfs_rq->curr != NULL)) {

- ___update_load_avg(&cfs_rq->avg, 1, 1);
+ ___update_load_avg(&cfs_rq->avg, 1);
trace_pelt_cfs_tp(cfs_rq);
return 1;
}
@@ -322,20 +308,19 @@ int __update_load_avg_cfs_rq(u64 now, struct cfs_rq *cfs_rq)
*
* util_sum = \Sum se->avg.util_sum but se->avg.util_sum is not tracked
* util_sum = cpu_scale * load_sum
- * runnable_load_sum = load_sum
+ * runnable_sum = util_sum
*
- * load_avg and runnable_load_avg are not supported and meaningless.
+ * load_avg is not supported and meaningless.
*
*/

int update_rt_rq_load_avg(u64 now, struct rq *rq, int running)
{
if (___update_load_sum(now, &rq->avg_rt,
- running,
running,
running)) {

- ___update_load_avg(&rq->avg_rt, 1, 1);
+ ___update_load_avg(&rq->avg_rt, 1);
trace_pelt_rt_tp(rq);
return 1;
}
@@ -348,18 +333,19 @@ int update_rt_rq_load_avg(u64 now, struct rq *rq, int running)
*
* util_sum = \Sum se->avg.util_sum but se->avg.util_sum is not tracked
* util_sum = cpu_scale * load_sum
- * runnable_load_sum = load_sum
+ * runnable_sum = util_sum
+ *
+ * load_avg is not supported and meaningless.
*
*/

int update_dl_rq_load_avg(u64 now, struct rq *rq, int running)
{
if (___update_load_sum(now, &rq->avg_dl,
- running,
running,
running)) {

- ___update_load_avg(&rq->avg_dl, 1, 1);
+ ___update_load_avg(&rq->avg_dl, 1);
trace_pelt_dl_tp(rq);
return 1;
}
@@ -373,7 +359,9 @@ int update_dl_rq_load_avg(u64 now, struct rq *rq, int running)
*
* util_sum = \Sum se->avg.util_sum but se->avg.util_sum is not tracked
* util_sum = cpu_scale * load_sum
- * runnable_load_sum = load_sum
+ * runnable_sum = util_sum
+ *
+ * load_avg is not supported and meaningless.
*
*/

@@ -401,16 +389,14 @@ int update_irq_load_avg(struct rq *rq, u64 running)
* rq->clock += delta with delta >= running
*/
ret = ___update_load_sum(rq->clock - running, &rq->avg_irq,
- 0,
0,
0);
ret += ___update_load_sum(rq->clock, &rq->avg_irq,
- 1,
1,
1);

if (ret) {
- ___update_load_avg(&rq->avg_irq, 1, 1);
+ ___update_load_avg(&rq->avg_irq, 1);
trace_pelt_irq_tp(rq);
}

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 878910e8b299..8760b656a349 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -489,7 +489,6 @@ struct cfs_bandwidth { };
/* CFS-related fields in a runqueue */
struct cfs_rq {
struct load_weight load;
- unsigned long runnable_weight;
unsigned int nr_running;
unsigned int h_nr_running; /* SCHED_{NORMAL,BATCH,IDLE} */
unsigned int idle_h_nr_running; /* SCHED_IDLE */
@@ -688,8 +687,10 @@ struct dl_rq {
#ifdef CONFIG_FAIR_GROUP_SCHED
/* An entity is a task if it doesn't "own" a runqueue */
#define entity_is_task(se) (!se->my_q)
+
#else
#define entity_is_task(se) 1
+
#endif

#ifdef CONFIG_SMP
@@ -701,10 +702,6 @@ static inline long se_weight(struct sched_entity *se)
return scale_load_down(se->load.weight);
}

-static inline long se_runnable(struct sched_entity *se)
-{
- return scale_load_down(se->runnable_weight);
-}

static inline bool sched_asym_prefer(int a, int b)
{
--
2.17.1
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