Commit-ID: 6c1d47c0827304949e0eb9479f4d587f226fac8b
Gitweb: http://git.kernel.org/tip/6c1d47c0827304949e0eb9479f4d587f226fac8b
Author: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
AuthorDate: Wed, 15 Jul 2015 08:04:38 +0800
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Mon, 3 Aug 2015 12:24:28 +0200
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: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
Signed-off-by: Yuyang Du <yuyang.du@xxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: arjan@xxxxxxxxxxxxxxx
Cc: bsegall@xxxxxxxxxx
Cc: dietmar.eggemann@xxxxxxx
Cc: fengguang.wu@xxxxxxxxx
Cc: len.brown@xxxxxxxxx
Cc: morten.rasmussen@xxxxxxx
Cc: pjt@xxxxxxxxxx
Cc: rafael.j.wysocki@xxxxxxxxx
Cc: umgwanakikbuti@xxxxxxxxx
Link: http://lkml.kernel.org/r/1436918682-4971-4-git-send-email-yuyang.du@xxxxxxxxx
[ Fixed up the SOB chain. ]
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/sched/fair.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 01ffa95..e4b80c6 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -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)
--
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