Commit 145d952a authored by Daniel Lezcano's avatar Daniel Lezcano Committed by Rafael J. Wysocki

sched: Factor out nr_iowait and nr_iowait_cpu

The function nr_iowait_cpu() can be used directly by nr_iowait() instead
of duplicating code.

Call nr_iowait_cpu() from nr_iowait()
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent bd6bf7c1
......@@ -2875,6 +2875,25 @@ unsigned long long nr_context_switches(void)
return sum;
}
/*
* Consumers of these two interfaces, like for example the cpuidle menu
* governor, are using nonsensical data. Preferring shallow idle state selection
* for a CPU that has IO-wait which might not even end up running the task when
* it does become runnable.
*/
unsigned long nr_iowait_cpu(int cpu)
{
return atomic_read(&cpu_rq(cpu)->nr_iowait);
}
void get_iowait_load(unsigned long *nr_waiters, unsigned long *load)
{
struct rq *rq = this_rq();
*nr_waiters = atomic_read(&rq->nr_iowait);
*load = rq->load.weight;
}
/*
* IO-wait accounting, and how its mostly bollocks (on SMP).
*
......@@ -2910,31 +2929,11 @@ unsigned long nr_iowait(void)
unsigned long i, sum = 0;
for_each_possible_cpu(i)
sum += atomic_read(&cpu_rq(i)->nr_iowait);
sum += nr_iowait_cpu(i);
return sum;
}
/*
* Consumers of these two interfaces, like for example the cpuidle menu
* governor, are using nonsensical data. Preferring shallow idle state selection
* for a CPU that has IO-wait which might not even end up running the task when
* it does become runnable.
*/
unsigned long nr_iowait_cpu(int cpu)
{
struct rq *this = cpu_rq(cpu);
return atomic_read(&this->nr_iowait);
}
void get_iowait_load(unsigned long *nr_waiters, unsigned long *load)
{
struct rq *rq = this_rq();
*nr_waiters = atomic_read(&rq->nr_iowait);
*load = rq->load.weight;
}
#ifdef CONFIG_SMP
/*
......
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