diff options
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 18d607f9a417..4f11b84eaf0a 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -91,6 +91,8 @@ #include <trace/events/sched.h> #include "walt.h" +static bool have_sched_energy_data(void); + DEFINE_MUTEX(sched_domains_mutex); DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues); @@ -193,6 +195,10 @@ static int sched_feat_set(char *cmp) sysctl_sched_features &= ~(1UL << i); sched_feat_disable(i); } else { + if (i == __SCHED_FEAT_ENERGY_AWARE) + WARN(!have_sched_energy_data(), + "Missing sched energy data\n"); + sysctl_sched_features |= (1UL << i); sched_feat_enable(i); } @@ -6649,6 +6655,19 @@ static void init_sched_groups_capacity(int cpu, struct sched_domain *sd) atomic_set(&sg->sgc->nr_busy_cpus, sg->group_weight); } +static bool have_sched_energy_data(void) +{ + int cpu; + + for_each_possible_cpu(cpu) { + if (!rcu_dereference(per_cpu(sd_scs, cpu)) || + !rcu_dereference(per_cpu(sd_ea, cpu))) + return false; + } + + return true; +} + /* * Check that the per-cpu provided sd energy data is consistent for all cpus * within the mask. @@ -7461,6 +7480,9 @@ static int build_sched_domains(const struct cpumask *cpu_map, } rcu_read_unlock(); + WARN(sched_feat(ENERGY_AWARE) && !have_sched_energy_data(), + "Missing data for energy aware scheduling\n"); + ret = 0; error: __free_domain_allocs(&d, alloc_state, cpu_map); |