diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/core.c | 14 | ||||
| -rw-r--r-- | kernel/sysctl.c | 7 |
2 files changed, 19 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 1d71f326bc4e..b1d48c53bf7e 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2058,6 +2058,7 @@ static void ttwu_queue(struct task_struct *p, int cpu) raw_spin_unlock(&rq->lock); } +__read_mostly unsigned int sysctl_sched_wakeup_load_threshold = 110; /** * try_to_wake_up - wake up a thread * @p: the thread to be awakened @@ -2156,7 +2157,7 @@ stat: out: raw_spin_unlock_irqrestore(&p->pi_lock, flags); - if (src_cpu != cpu && task_notify_on_migrate(p)) { + if (task_notify_on_migrate(p)) { struct migration_notify_data mnd; mnd.src_cpu = src_cpu; @@ -2166,7 +2167,16 @@ out: (u64)(sysctl_sched_ravg_window)); else mnd.load = 0; - atomic_notifier_call_chain(&migration_notifier_head, + /* + * Call the migration notifier with mnd for foreground task + * migrations as well as for wakeups if their load is above + * sysctl_sched_wakeup_load_threshold. This would prompt the + * cpu-boost to boost the CPU frequency on wake up of a heavy + * weight foreground task + */ + if ((src_cpu != cpu) || (mnd.load > + sysctl_sched_wakeup_load_threshold)) + atomic_notifier_call_chain(&migration_notifier_head, 0, (void *)&mnd); } return success; diff --git a/kernel/sysctl.c b/kernel/sysctl.c index ff8df5e6614e..1314618f07f8 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -299,6 +299,13 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, + { + .procname = "sched_wakeup_load_threshold", + .data = &sysctl_sched_wakeup_load_threshold, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = proc_dointvec, + }, #ifdef CONFIG_SCHED_DEBUG { .procname = "sched_min_granularity_ns", |