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

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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: Vincent Guittot <[email protected]>
Signed-off-by: Yuyang Du <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
[ Fixed up the SOB chain. ]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Vincent Guittot 2015-07-15 08:04:38 +08:00 • committed by Ingo Molnar
commit 6c1d47c082
1 changed files with 8 additions and 0 deletions
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8
kernel/sched/fair.c
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@ -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)