[PATCH v4 2/8] sched: make struct sched_statistics independent of fair sched class
From: Yafang Shao
Date: Sun Sep 05 2021 - 10:36:19 EST
If we want to use the schedstats facility to trace other sched classes, we
should make it independent of fair sched class. The struct sched_statistics
is the schedular statistics of a task_struct or a task_group. So we can
move it into struct task_struct and struct task_group to achieve the goal.
After the patch, schestats are orgnized as follows,
struct task_struct {
...
struct sched_entity se;
struct sched_rt_entity rt;
struct sched_dl_entity dl;
...
struct sched_statistics stats;
...
};
Regarding the task group, schedstats is only supported for fair group
sched, and a new struct sched_entity_stats is introduced, suggested by
Peter -
struct sched_entity_stats {
struct sched_entity se;
struct sched_statistics stats;
} __no_randomize_layout;
Then with the se in a task_group, we can easily get the stats.
The sched_statistics members may be frequently modified when schedstats is
enabled, in order to avoid impacting on random data which may in the same
cacheline with them, the struct sched_statistics is defined as cacheline
aligned.
As this patch changes the core struct of scheduler, so I verified the
performance it may impact on the scheduler with 'perf bench sched
pipe', suggested by Mel. Below is the result, in which all the values
are in usecs/op.
Before After
kernel.sched_schedstats=0 5.2~5.4 5.2~5.4
kernel.sched_schedstats=1 5.3~5.5 5.3~5.5
[These data is a little difference with the earlier version, that is
because my old test machine is destroyed so I have to use a new
different test machine.]
Almost no impact on the sched performance.
No functional change.
[lkp@xxxxxxxxx: reported build failure in earlier version]
Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxx>
Cc: kernel test robot <lkp@xxxxxxxxx>
Cc: Alison Chaiken <achaiken@xxxxxxxxxxx>
---
include/linux/sched.h | 6 +--
kernel/sched/core.c | 25 ++++++-----
kernel/sched/deadline.c | 4 +-
kernel/sched/debug.c | 91 +++++++++++++++++++++-------------------
kernel/sched/fair.c | 87 ++++++++++++++++++++++----------------
kernel/sched/rt.c | 4 +-
kernel/sched/stats.h | 19 +++++++++
kernel/sched/stop_task.c | 4 +-
8 files changed, 140 insertions(+), 100 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 1780260f237b..ed4293812ca9 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -521,7 +521,7 @@ struct sched_statistics {
u64 nr_wakeups_passive;
u64 nr_wakeups_idle;
#endif
-};
+} ____cacheline_aligned;
struct sched_entity {
/* For load-balancing: */
@@ -537,8 +537,6 @@ struct sched_entity {
u64 nr_migrations;
- struct sched_statistics statistics;
-
#ifdef CONFIG_FAIR_GROUP_SCHED
int depth;
struct sched_entity *parent;
@@ -802,6 +800,8 @@ struct task_struct {
struct uclamp_se uclamp[UCLAMP_CNT];
#endif
+ struct sched_statistics stats;
+
#ifdef CONFIG_PREEMPT_NOTIFIERS
/* List of struct preempt_notifier: */
struct hlist_head preempt_notifiers;
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index f963c8113375..04c04504249a 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3489,11 +3489,11 @@ ttwu_stat(struct task_struct *p, int cpu, int wake_flags)
#ifdef CONFIG_SMP
if (cpu == rq->cpu) {
__schedstat_inc(rq->ttwu_local);
- __schedstat_inc(p->se.statistics.nr_wakeups_local);
+ __schedstat_inc(p->stats.nr_wakeups_local);
} else {
struct sched_domain *sd;
- __schedstat_inc(p->se.statistics.nr_wakeups_remote);
+ __schedstat_inc(p->stats.nr_wakeups_remote);
rcu_read_lock();
for_each_domain(rq->cpu, sd) {
if (cpumask_test_cpu(cpu, sched_domain_span(sd))) {
@@ -3505,14 +3505,14 @@ ttwu_stat(struct task_struct *p, int cpu, int wake_flags)
}
if (wake_flags & WF_MIGRATED)
- __schedstat_inc(p->se.statistics.nr_wakeups_migrate);
+ __schedstat_inc(p->stats.nr_wakeups_migrate);
#endif /* CONFIG_SMP */
__schedstat_inc(rq->ttwu_count);
- __schedstat_inc(p->se.statistics.nr_wakeups);
+ __schedstat_inc(p->stats.nr_wakeups);
if (wake_flags & WF_SYNC)
- __schedstat_inc(p->se.statistics.nr_wakeups_sync);
+ __schedstat_inc(p->stats.nr_wakeups_sync);
}
/*
@@ -4196,7 +4196,7 @@ static void __sched_fork(unsigned long clone_flags, struct task_struct *p)
#ifdef CONFIG_SCHEDSTATS
/* Even if schedstat is disabled, there should not be garbage */
- memset(&p->se.statistics, 0, sizeof(p->se.statistics));
+ memset(&p->stats, 0, sizeof(p->stats));
#endif
RB_CLEAR_NODE(&p->dl.rb_node);
@@ -9553,9 +9553,9 @@ void normalize_rt_tasks(void)
continue;
p->se.exec_start = 0;
- schedstat_set(p->se.statistics.wait_start, 0);
- schedstat_set(p->se.statistics.sleep_start, 0);
- schedstat_set(p->se.statistics.block_start, 0);
+ schedstat_set(p->stats.wait_start, 0);
+ schedstat_set(p->stats.sleep_start, 0);
+ schedstat_set(p->stats.block_start, 0);
if (!dl_task(p) && !rt_task(p)) {
/*
@@ -10397,11 +10397,14 @@ static int cpu_cfs_stat_show(struct seq_file *sf, void *v)
seq_printf(sf, "throttled_time %llu\n", cfs_b->throttled_time);
if (schedstat_enabled() && tg != &root_task_group) {
+ struct sched_statistics *stats;
u64 ws = 0;
int i;
- for_each_possible_cpu(i)
- ws += schedstat_val(tg->se[i]->statistics.wait_sum);
+ for_each_possible_cpu(i) {
+ stats = __schedstats_from_se(tg->se[i]);
+ ws += schedstat_val(stats->wait_sum);
+ }
seq_printf(sf, "wait_sum %llu\n", ws);
}
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index e94314633b39..51dd30990042 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1265,8 +1265,8 @@ static void update_curr_dl(struct rq *rq)
return;
}
- schedstat_set(curr->se.statistics.exec_max,
- max(curr->se.statistics.exec_max, delta_exec));
+ schedstat_set(curr->stats.exec_max,
+ max(curr->stats.exec_max, delta_exec));
curr->se.sum_exec_runtime += delta_exec;
account_group_exec_runtime(curr, delta_exec);
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 49716228efb4..da923347c8f3 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -440,11 +440,14 @@ void dirty_sched_domain_sysctl(int cpu)
static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group *tg)
{
struct sched_entity *se = tg->se[cpu];
+ struct sched_statistics *stats = __schedstats_from_se(se);
#define P(F) SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)F)
-#define P_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld\n", #F, (long long)schedstat_val(F))
+#define P_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld\n", \
+ #F, (long long)schedstat_val(stats->F))
#define PN(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
-#define PN_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)schedstat_val(F)))
+#define PN_SCHEDSTAT(F) SEQ_printf(m, " .%-30s: %lld.%06ld\n", \
+ #F, SPLIT_NS((long long)schedstat_val(stats->F)))
if (!se)
return;
@@ -454,16 +457,16 @@ static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group
PN(se->sum_exec_runtime);
if (schedstat_enabled()) {
- PN_SCHEDSTAT(se->statistics.wait_start);
- PN_SCHEDSTAT(se->statistics.sleep_start);
- PN_SCHEDSTAT(se->statistics.block_start);
- PN_SCHEDSTAT(se->statistics.sleep_max);
- PN_SCHEDSTAT(se->statistics.block_max);
- PN_SCHEDSTAT(se->statistics.exec_max);
- PN_SCHEDSTAT(se->statistics.slice_max);
- PN_SCHEDSTAT(se->statistics.wait_max);
- PN_SCHEDSTAT(se->statistics.wait_sum);
- P_SCHEDSTAT(se->statistics.wait_count);
+ PN_SCHEDSTAT(wait_start);
+ PN_SCHEDSTAT(sleep_start);
+ PN_SCHEDSTAT(block_start);
+ PN_SCHEDSTAT(sleep_max);
+ PN_SCHEDSTAT(block_max);
+ PN_SCHEDSTAT(exec_max);
+ PN_SCHEDSTAT(slice_max);
+ PN_SCHEDSTAT(wait_max);
+ PN_SCHEDSTAT(wait_sum);
+ P_SCHEDSTAT(wait_count);
}
P(se->load.weight);
@@ -530,9 +533,9 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
p->prio);
SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
- SPLIT_NS(schedstat_val_or_zero(p->se.statistics.wait_sum)),
+ SPLIT_NS(schedstat_val_or_zero(p->stats.wait_sum)),
SPLIT_NS(p->se.sum_exec_runtime),
- SPLIT_NS(schedstat_val_or_zero(p->se.statistics.sum_sleep_runtime)));
+ SPLIT_NS(schedstat_val_or_zero(p->stats.sum_sleep_runtime)));
#ifdef CONFIG_NUMA_BALANCING
SEQ_printf(m, " %d %d", task_node(p), task_numa_group_id(p));
@@ -948,8 +951,8 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
"---------------------------------------------------------"
"----------\n");
-#define P_SCHEDSTAT(F) __PS(#F, schedstat_val(p->F))
-#define PN_SCHEDSTAT(F) __PSN(#F, schedstat_val(p->F))
+#define P_SCHEDSTAT(F) __PS(#F, schedstat_val(p->stats.F))
+#define PN_SCHEDSTAT(F) __PSN(#F, schedstat_val(p->stats.F))
PN(se.exec_start);
PN(se.vruntime);
@@ -962,33 +965,33 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
if (schedstat_enabled()) {
u64 avg_atom, avg_per_cpu;
- PN_SCHEDSTAT(se.statistics.sum_sleep_runtime);
- PN_SCHEDSTAT(se.statistics.wait_start);
- PN_SCHEDSTAT(se.statistics.sleep_start);
- PN_SCHEDSTAT(se.statistics.block_start);
- PN_SCHEDSTAT(se.statistics.sleep_max);
- PN_SCHEDSTAT(se.statistics.block_max);
- PN_SCHEDSTAT(se.statistics.exec_max);
- PN_SCHEDSTAT(se.statistics.slice_max);
- PN_SCHEDSTAT(se.statistics.wait_max);
- PN_SCHEDSTAT(se.statistics.wait_sum);
- P_SCHEDSTAT(se.statistics.wait_count);
- PN_SCHEDSTAT(se.statistics.iowait_sum);
- P_SCHEDSTAT(se.statistics.iowait_count);
- P_SCHEDSTAT(se.statistics.nr_migrations_cold);
- P_SCHEDSTAT(se.statistics.nr_failed_migrations_affine);
- P_SCHEDSTAT(se.statistics.nr_failed_migrations_running);
- P_SCHEDSTAT(se.statistics.nr_failed_migrations_hot);
- P_SCHEDSTAT(se.statistics.nr_forced_migrations);
- P_SCHEDSTAT(se.statistics.nr_wakeups);
- P_SCHEDSTAT(se.statistics.nr_wakeups_sync);
- P_SCHEDSTAT(se.statistics.nr_wakeups_migrate);
- P_SCHEDSTAT(se.statistics.nr_wakeups_local);
- P_SCHEDSTAT(se.statistics.nr_wakeups_remote);
- P_SCHEDSTAT(se.statistics.nr_wakeups_affine);
- P_SCHEDSTAT(se.statistics.nr_wakeups_affine_attempts);
- P_SCHEDSTAT(se.statistics.nr_wakeups_passive);
- P_SCHEDSTAT(se.statistics.nr_wakeups_idle);
+ PN_SCHEDSTAT(sum_sleep_runtime);
+ PN_SCHEDSTAT(wait_start);
+ PN_SCHEDSTAT(sleep_start);
+ PN_SCHEDSTAT(block_start);
+ PN_SCHEDSTAT(sleep_max);
+ PN_SCHEDSTAT(block_max);
+ PN_SCHEDSTAT(exec_max);
+ PN_SCHEDSTAT(slice_max);
+ PN_SCHEDSTAT(wait_max);
+ PN_SCHEDSTAT(wait_sum);
+ P_SCHEDSTAT(wait_count);
+ PN_SCHEDSTAT(iowait_sum);
+ P_SCHEDSTAT(iowait_count);
+ P_SCHEDSTAT(nr_migrations_cold);
+ P_SCHEDSTAT(nr_failed_migrations_affine);
+ P_SCHEDSTAT(nr_failed_migrations_running);
+ P_SCHEDSTAT(nr_failed_migrations_hot);
+ P_SCHEDSTAT(nr_forced_migrations);
+ P_SCHEDSTAT(nr_wakeups);
+ P_SCHEDSTAT(nr_wakeups_sync);
+ P_SCHEDSTAT(nr_wakeups_migrate);
+ P_SCHEDSTAT(nr_wakeups_local);
+ P_SCHEDSTAT(nr_wakeups_remote);
+ P_SCHEDSTAT(nr_wakeups_affine);
+ P_SCHEDSTAT(nr_wakeups_affine_attempts);
+ P_SCHEDSTAT(nr_wakeups_passive);
+ P_SCHEDSTAT(nr_wakeups_idle);
avg_atom = p->se.sum_exec_runtime;
if (nr_switches)
@@ -1054,7 +1057,7 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
void proc_sched_set_task(struct task_struct *p)
{
#ifdef CONFIG_SCHEDSTATS
- memset(&p->se.statistics, 0, sizeof(p->se.statistics));
+ memset(&p->stats, 0, sizeof(p->stats));
#endif
}
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 1b92eec48745..8b4b97453cca 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -837,8 +837,12 @@ static void update_curr(struct cfs_rq *cfs_rq)
curr->exec_start = now;
- schedstat_set(curr->statistics.exec_max,
- max(delta_exec, curr->statistics.exec_max));
+ if (schedstat_enabled()) {
+ struct sched_statistics *stats = __schedstats_from_se(curr);
+
+ __schedstat_set(stats->exec_max,
+ max(delta_exec, stats->exec_max));
+ }
curr->sum_exec_runtime += delta_exec;
schedstat_add(cfs_rq->exec_clock, delta_exec);
@@ -866,39 +870,45 @@ static inline void
update_stats_wait_start(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
u64 wait_start, prev_wait_start;
+ struct sched_statistics *stats;
if (!schedstat_enabled())
return;
+ stats = __schedstats_from_se(se);
+
wait_start = rq_clock(rq_of(cfs_rq));
- prev_wait_start = schedstat_val(se->statistics.wait_start);
+ prev_wait_start = schedstat_val(stats->wait_start);
if (entity_is_task(se) && task_on_rq_migrating(task_of(se)) &&
likely(wait_start > prev_wait_start))
wait_start -= prev_wait_start;
- __schedstat_set(se->statistics.wait_start, wait_start);
+ __schedstat_set(stats->wait_start, wait_start);
}
static inline void
update_stats_wait_end(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
- struct task_struct *p;
+ struct sched_statistics *stats;
+ struct task_struct *p = NULL;
u64 delta;
if (!schedstat_enabled())
return;
+ stats = __schedstats_from_se(se);
+
/*
* When the sched_schedstat changes from 0 to 1, some sched se
* maybe already in the runqueue, the se->statistics.wait_start
* will be 0.So it will let the delta wrong. We need to avoid this
* scenario.
*/
- if (unlikely(!schedstat_val(se->statistics.wait_start)))
+ if (unlikely(!schedstat_val(stats->wait_start)))
return;
- delta = rq_clock(rq_of(cfs_rq)) - schedstat_val(se->statistics.wait_start);
+ delta = rq_clock(rq_of(cfs_rq)) - schedstat_val(stats->wait_start);
if (entity_is_task(se)) {
p = task_of(se);
@@ -908,30 +918,33 @@ update_stats_wait_end(struct cfs_rq *cfs_rq, struct sched_entity *se)
* time stamp can be adjusted to accumulate wait time
* prior to migration.
*/
- __schedstat_set(se->statistics.wait_start, delta);
+ __schedstat_set(stats->wait_start, delta);
return;
}
trace_sched_stat_wait(p, delta);
}
- __schedstat_set(se->statistics.wait_max,
- max(schedstat_val(se->statistics.wait_max), delta));
- __schedstat_inc(se->statistics.wait_count);
- __schedstat_add(se->statistics.wait_sum, delta);
- __schedstat_set(se->statistics.wait_start, 0);
+ __schedstat_set(stats->wait_max,
+ max(schedstat_val(stats->wait_max), delta));
+ __schedstat_inc(stats->wait_count);
+ __schedstat_add(stats->wait_sum, delta);
+ __schedstat_set(stats->wait_start, 0);
}
static inline void
update_stats_enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
+ struct sched_statistics *stats;
struct task_struct *tsk = NULL;
u64 sleep_start, block_start;
if (!schedstat_enabled())
return;
- sleep_start = schedstat_val(se->statistics.sleep_start);
- block_start = schedstat_val(se->statistics.block_start);
+ stats = __schedstats_from_se(se);
+
+ sleep_start = schedstat_val(stats->sleep_start);
+ block_start = schedstat_val(stats->block_start);
if (entity_is_task(se))
tsk = task_of(se);
@@ -942,11 +955,11 @@ update_stats_enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
if ((s64)delta < 0)
delta = 0;
- if (unlikely(delta > schedstat_val(se->statistics.sleep_max)))
- __schedstat_set(se->statistics.sleep_max, delta);
+ if (unlikely(delta > schedstat_val(stats->sleep_max)))
+ __schedstat_set(stats->sleep_max, delta);
- __schedstat_set(se->statistics.sleep_start, 0);
- __schedstat_add(se->statistics.sum_sleep_runtime, delta);
+ __schedstat_set(stats->sleep_start, 0);
+ __schedstat_add(stats->sum_sleep_runtime, delta);
if (tsk) {
account_scheduler_latency(tsk, delta >> 10, 1);
@@ -959,16 +972,16 @@ update_stats_enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
if ((s64)delta < 0)
delta = 0;
- if (unlikely(delta > schedstat_val(se->statistics.block_max)))
- __schedstat_set(se->statistics.block_max, delta);
+ if (unlikely(delta > schedstat_val(stats->block_max)))
+ __schedstat_set(stats->block_max, delta);
- __schedstat_set(se->statistics.block_start, 0);
- __schedstat_add(se->statistics.sum_sleep_runtime, delta);
+ __schedstat_set(stats->block_start, 0);
+ __schedstat_add(stats->sum_sleep_runtime, delta);
if (tsk) {
if (tsk->in_iowait) {
- __schedstat_add(se->statistics.iowait_sum, delta);
- __schedstat_inc(se->statistics.iowait_count);
+ __schedstat_add(stats->iowait_sum, delta);
+ __schedstat_inc(stats->iowait_count);
trace_sched_stat_iowait(tsk, delta);
}
@@ -1030,10 +1043,10 @@ update_stats_dequeue(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
/* XXX racy against TTWU */
state = READ_ONCE(tsk->__state);
if (state & TASK_INTERRUPTIBLE)
- __schedstat_set(se->statistics.sleep_start,
+ __schedstat_set(tsk->stats.sleep_start,
rq_clock(rq_of(cfs_rq)));
if (state & TASK_UNINTERRUPTIBLE)
- __schedstat_set(se->statistics.block_start,
+ __schedstat_set(tsk->stats.block_start,
rq_clock(rq_of(cfs_rq)));
}
}
@@ -4502,8 +4515,10 @@ set_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *se)
*/
if (schedstat_enabled() &&
rq_of(cfs_rq)->cfs.load.weight >= 2*se->load.weight) {
- __schedstat_set(se->statistics.slice_max,
- max((u64)schedstat_val(se->statistics.slice_max),
+ struct sched_statistics *stats = __schedstats_from_se(se);
+
+ __schedstat_set(stats->slice_max,
+ max((u64)schedstat_val(stats->slice_max),
se->sum_exec_runtime - se->prev_sum_exec_runtime));
}
@@ -5994,12 +6009,12 @@ static int wake_affine(struct sched_domain *sd, struct task_struct *p,
if (sched_feat(WA_WEIGHT) && target == nr_cpumask_bits)
target = wake_affine_weight(sd, p, this_cpu, prev_cpu, sync);
- schedstat_inc(p->se.statistics.nr_wakeups_affine_attempts);
+ schedstat_inc(p->stats.nr_wakeups_affine_attempts);
if (target == nr_cpumask_bits)
return prev_cpu;
schedstat_inc(sd->ttwu_move_affine);
- schedstat_inc(p->se.statistics.nr_wakeups_affine);
+ schedstat_inc(p->stats.nr_wakeups_affine);
return target;
}
@@ -7803,7 +7818,7 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env)
if (!cpumask_test_cpu(env->dst_cpu, p->cpus_ptr)) {
int cpu;
- schedstat_inc(p->se.statistics.nr_failed_migrations_affine);
+ schedstat_inc(p->stats.nr_failed_migrations_affine);
env->flags |= LBF_SOME_PINNED;
@@ -7837,7 +7852,7 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env)
env->flags &= ~LBF_ALL_PINNED;
if (task_running(env->src_rq, p)) {
- schedstat_inc(p->se.statistics.nr_failed_migrations_running);
+ schedstat_inc(p->stats.nr_failed_migrations_running);
return 0;
}
@@ -7859,12 +7874,12 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env)
env->sd->nr_balance_failed > env->sd->cache_nice_tries) {
if (tsk_cache_hot == 1) {
schedstat_inc(env->sd->lb_hot_gained[env->idle]);
- schedstat_inc(p->se.statistics.nr_forced_migrations);
+ schedstat_inc(p->stats.nr_forced_migrations);
}
return 1;
}
- schedstat_inc(p->se.statistics.nr_failed_migrations_hot);
+ schedstat_inc(p->stats.nr_failed_migrations_hot);
return 0;
}
@@ -11506,7 +11521,7 @@ int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
if (!cfs_rq)
goto err;
- se = kzalloc_node(sizeof(struct sched_entity),
+ se = kzalloc_node(sizeof(struct sched_entity_stats),
GFP_KERNEL, cpu_to_node(i));
if (!se)
goto err_free_rq;
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 3daf42a0f462..95a7c3ad2dc3 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1009,8 +1009,8 @@ static void update_curr_rt(struct rq *rq)
if (unlikely((s64)delta_exec <= 0))
return;
- schedstat_set(curr->se.statistics.exec_max,
- max(curr->se.statistics.exec_max, delta_exec));
+ schedstat_set(curr->stats.exec_max,
+ max(curr->stats.exec_max, delta_exec));
curr->se.sum_exec_runtime += delta_exec;
account_group_exec_runtime(curr, delta_exec);
diff --git a/kernel/sched/stats.h b/kernel/sched/stats.h
index d8f8eb0c655b..fb6022e860af 100644
--- a/kernel/sched/stats.h
+++ b/kernel/sched/stats.h
@@ -41,6 +41,7 @@ rq_sched_info_dequeue(struct rq *rq, unsigned long long delta)
#define schedstat_val_or_zero(var) ((schedstat_enabled()) ? (var) : 0)
#else /* !CONFIG_SCHEDSTATS: */
+
static inline void rq_sched_info_arrive (struct rq *rq, unsigned long long delta) { }
static inline void rq_sched_info_dequeue(struct rq *rq, unsigned long long delta) { }
static inline void rq_sched_info_depart (struct rq *rq, unsigned long long delta) { }
@@ -53,8 +54,26 @@ static inline void rq_sched_info_depart (struct rq *rq, unsigned long long delt
# define schedstat_set(var, val) do { } while (0)
# define schedstat_val(var) 0
# define schedstat_val_or_zero(var) 0
+
#endif /* CONFIG_SCHEDSTATS */
+#ifdef CONFIG_FAIR_GROUP_SCHED
+struct sched_entity_stats {
+ struct sched_entity se;
+ struct sched_statistics stats;
+} __no_randomize_layout;
+#endif
+
+static inline struct sched_statistics *
+__schedstats_from_se(struct sched_entity *se)
+{
+#ifdef CONFIG_FAIR_GROUP_SCHED
+ if (!entity_is_task(se))
+ return &container_of(se, struct sched_entity_stats, se)->stats;
+#endif
+ return &task_of(se)->stats;
+}
+
#ifdef CONFIG_PSI
/*
* PSI tracks state that persists across sleeps, such as iowaits and
diff --git a/kernel/sched/stop_task.c b/kernel/sched/stop_task.c
index f988ebe3febb..0b165a25f22f 100644
--- a/kernel/sched/stop_task.c
+++ b/kernel/sched/stop_task.c
@@ -78,8 +78,8 @@ static void put_prev_task_stop(struct rq *rq, struct task_struct *prev)
if (unlikely((s64)delta_exec < 0))
delta_exec = 0;
- schedstat_set(curr->se.statistics.exec_max,
- max(curr->se.statistics.exec_max, delta_exec));
+ schedstat_set(curr->stats.exec_max,
+ max(curr->stats.exec_max, delta_exec));
curr->se.sum_exec_runtime += delta_exec;
account_group_exec_runtime(curr, delta_exec);
--
2.18.2