diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 5530ed211f7..ba053d88c8c 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -223,6 +223,7 @@ struct rq { unsigned long raw_weighted_load; #ifdef CONFIG_SMP unsigned long cpu_load[3]; + unsigned char idle_at_tick; #endif unsigned long long nr_switches; @@ -2943,12 +2944,7 @@ static void run_rebalance_domains(struct softirq_action *h) struct rq *this_rq = cpu_rq(this_cpu); unsigned long interval; struct sched_domain *sd; - /* - * We are idle if there are no processes running. This - * is valid even if we are the idle process (SMT). - */ - enum idle_type idle = !this_rq->nr_running ? - SCHED_IDLE : NOT_IDLE; + enum idle_type idle = this_rq->idle_at_tick ? SCHED_IDLE : NOT_IDLE; /* Earliest time when we have to call run_rebalance_domains again */ unsigned long next_balance = jiffies + 60*HZ; @@ -3218,14 +3214,16 @@ void scheduler_tick(void) unsigned long long now = sched_clock(); struct task_struct *p = current; int cpu = smp_processor_id(); + int idle_at_tick = idle_cpu(cpu); struct rq *rq = cpu_rq(cpu); update_cpu_clock(p, rq, now); - if (p != rq->idle) + if (!idle_at_tick) task_running_tick(rq, p); #ifdef CONFIG_SMP update_load(rq); + rq->idle_at_tick = idle_at_tick; if (time_after_eq(jiffies, rq->next_balance)) raise_softirq(SCHED_SOFTIRQ); #endif |