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Commit 72bbd4b7 authored by Olav Haugan's avatar Olav Haugan
Browse files

sched: Add checks for frequency change 



We need to check for frequency change when a task is migrated due to
affinity change and during active balance.

Change-Id: I96676db04d34b5b91edd83431c236a1c28166985
Signed-off-by: default avatarOlav Haugan <ohaugan@codeaurora.org>
parent 093d9369

kernel/sched/core.c

+4 −0
Original line number Diff line number Diff line
@@ -6777,6 +6777,10 @@ done: 
fail:

	double_rq_unlock(rq_src, rq_dest);

	raw_spin_unlock(&p->pi_lock);

	if (moved && !same_freq_domain(src_cpu, dest_cpu)) {

		check_for_freq_change(rq_src);

		check_for_freq_change(rq_dest);

	}

	if (moved && task_notify_on_migrate(p)) {

		struct migration_notify_data mnd;

kernel/sched/fair.c

+14 −3
Original line number Diff line number Diff line
@@ -6718,6 +6718,7 @@ static int active_load_balance_cpu_stop(void *data) 
		.flags		= 0,

		.loop		= 0,

	};

	bool moved = false;



	raw_spin_lock_irq(&busiest_rq->lock);
@@ -6747,8 +6748,10 @@ static int active_load_balance_cpu_stop(void *data) 
	if (push_task) {

		if (push_task->on_rq && push_task->state == TASK_RUNNING &&

		    task_cpu(push_task) == busiest_cpu &&

		    cpu_online(target_cpu))

		    cpu_online(target_cpu)) {

			move_task(push_task, &env);

			moved = true;

		}

		goto out_unlock_balance;

	}
@@ -6764,11 +6767,13 @@ static int active_load_balance_cpu_stop(void *data) 
		env.sd = sd;

		schedstat_inc(sd, alb_count);



		if (move_one_task(&env))

		if (move_one_task(&env)) {

			schedstat_inc(sd, alb_pushed);

		else

			moved = true;

		} else {

			schedstat_inc(sd, alb_failed);

		}

	}

	rcu_read_unlock();

out_unlock_balance:

	double_unlock_balance(busiest_rq, target_rq);
@@ -6782,6 +6787,12 @@ out_unlock: 
		busiest_rq->push_task = NULL;

	}

	raw_spin_unlock_irq(&busiest_rq->lock);



	if (moved && !same_freq_domain(busiest_cpu, target_cpu)) {

		check_for_freq_change(busiest_rq);

		check_for_freq_change(target_rq);

	}



	if (per_cpu(dbs_boost_needed, target_cpu)) {

		struct migration_notify_data mnd;