Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 6c1d47c0 authored by Vincent Guittot's avatar Vincent Guittot Committed by Ingo Molnar
Browse files

sched/fair: Implement update_blocked_averages() for CONFIG_FAIR_GROUP_SCHED=n 



The load and the utilization of idle CPUs must be updated periodically in
order to decay the blocked part.

If CONFIG_FAIR_GROUP_SCHED is not set, the load and util of idle cpus
are not decayed and stay at the values set before becoming idle.

Signed-off-by: default avatarVincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: default avatarYuyang Du <yuyang.du@intel.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: arjan@linux.intel.com
Cc: bsegall@google.com
Cc: dietmar.eggemann@arm.com
Cc: fengguang.wu@intel.com
Cc: len.brown@intel.com
Cc: morten.rasmussen@arm.com
Cc: pjt@google.com
Cc: rafael.j.wysocki@intel.com
Cc: umgwanakikbuti@gmail.com
Link: http://lkml.kernel.org/r/1436918682-4971-4-git-send-email-yuyang.du@intel.com


[ Fixed up the SOB chain. ]
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 9d89c257

kernel/sched/fair.c

+8 −0
Original line number Diff line number Diff line
@@ -5846,6 +5846,14 @@ static unsigned long task_h_load(struct task_struct *p) 
#else

static inline void update_blocked_averages(int cpu)

{

	struct rq *rq = cpu_rq(cpu);

	struct cfs_rq *cfs_rq = &rq->cfs;

	unsigned long flags;



	raw_spin_lock_irqsave(&rq->lock, flags);

	update_rq_clock(rq);

	update_cfs_rq_load_avg(cfs_rq_clock_task(cfs_rq), cfs_rq);

	raw_spin_unlock_irqrestore(&rq->lock, flags);

}



static unsigned long task_h_load(struct task_struct *p)