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sched/fair: Make ilb_notifier an explicit call 

No need for an extra notifier.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160310120025.693720241@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
hifive-unleashed-5.1
Thomas Gleixner 2016-03-10 12:54:20 +01:00
parent aaddd7d1c7
commit 20a5c8cc74
3 changed files with 6 additions and 14 deletions
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1
kernel/sched/core.c
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@ -7131,6 +7131,7 @@ int sched_cpu_dying(unsigned int cpu)
raw_spin_unlock_irqrestore(&rq->lock, flags);
calc_load_migrate(rq);
update_max_interval();
nohz_balance_exit_idle(cpu);
return 0;
}
#endif

15
kernel/sched/fair.c
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@ -7711,7 +7711,7 @@ static void nohz_balancer_kick(void)
return;
}
static inline void nohz_balance_exit_idle(int cpu)
void nohz_balance_exit_idle(unsigned int cpu)
{
if (unlikely(test_bit(NOHZ_TICK_STOPPED, nohz_flags(cpu)))) {
/*
@ -7784,18 +7784,6 @@ void nohz_balance_enter_idle(int cpu)
atomic_inc(&nohz.nr_cpus);
set_bit(NOHZ_TICK_STOPPED, nohz_flags(cpu));
}
static int sched_ilb_notifier(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_DYING:
nohz_balance_exit_idle(smp_processor_id());
return NOTIFY_OK;
default:
return NOTIFY_DONE;
}
}
#endif
static DEFINE_SPINLOCK(balancing);
@ -8600,7 +8588,6 @@ __init void init_sched_fair_class(void)
#ifdef CONFIG_NO_HZ_COMMON
nohz.next_balance = jiffies;
zalloc_cpumask_var(&nohz.idle_cpus_mask, GFP_NOWAIT);
cpu_notifier(sched_ilb_notifier, 0);
#endif
#endif /* SMP */

4
kernel/sched/sched.h
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@ -1743,6 +1743,10 @@ enum rq_nohz_flag_bits {
};
#define nohz_flags(cpu) (&cpu_rq(cpu)->nohz_flags)
extern void nohz_balance_exit_idle(unsigned int cpu);
#else
static inline void nohz_balance_exit_idle(unsigned int cpu) { }
#endif
#ifdef CONFIG_IRQ_TIME_ACCOUNTING