Messages in this thread Patch in this message | | | Date | Thu, 5 May 2016 04:26:23 -0700 | From | tip-bot for Thomas Gleixner <> | Subject | [tip:smp/hotplug] sched/fair: Make ilb_notifier an explicit call |
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Commit-ID: 95217bbf05fe4197e810757261332413fc5764e5 Gitweb: http://git.kernel.org/tip/95217bbf05fe4197e810757261332413fc5764e5 Author: Thomas Gleixner <tglx@linutronix.de> AuthorDate: Thu, 10 Mar 2016 12:54:20 +0100 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Thu, 5 May 2016 13:17:55 +0200
sched/fair: Make ilb_notifier an explicit call
No need for an extra notifier.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160310120025.693720241@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
--- kernel/sched/core.c | 1 + kernel/sched/fair.c | 15 +-------------- kernel/sched/sched.h | 4 ++++ 3 files changed, 6 insertions(+), 14 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index db92285..8d59c31 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -7130,6 +7130,7 @@ int sched_cpu_dying(unsigned int cpu) raw_spin_unlock_irqrestore(&rq->lock, flags); calc_load_migrate(rq); update_max_interval(); + nohz_balance_exit_idle(cpu); return 0; } diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 0fe30e6..8b6db36 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -7711,7 +7711,7 @@ static void nohz_balancer_kick(void) return; } -static inline void nohz_balance_exit_idle(int cpu) +void nohz_balance_exit_idle(unsigned int cpu) { if (unlikely(test_bit(NOHZ_TICK_STOPPED, nohz_flags(cpu)))) { /* @@ -7784,18 +7784,6 @@ void nohz_balance_enter_idle(int cpu) atomic_inc(&nohz.nr_cpus); set_bit(NOHZ_TICK_STOPPED, nohz_flags(cpu)); } - -static int sched_ilb_notifier(struct notifier_block *nfb, - unsigned long action, void *hcpu) -{ - switch (action & ~CPU_TASKS_FROZEN) { - case CPU_DYING: - nohz_balance_exit_idle(smp_processor_id()); - return NOTIFY_OK; - default: - return NOTIFY_DONE; - } -} #endif static DEFINE_SPINLOCK(balancing); @@ -8600,7 +8588,6 @@ __init void init_sched_fair_class(void) #ifdef CONFIG_NO_HZ_COMMON nohz.next_balance = jiffies; zalloc_cpumask_var(&nohz.idle_cpus_mask, GFP_NOWAIT); - cpu_notifier(sched_ilb_notifier, 0); #endif #endif /* SMP */ diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index ec2e8d2..16a27b6 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1743,6 +1743,10 @@ enum rq_nohz_flag_bits { }; #define nohz_flags(cpu) (&cpu_rq(cpu)->nohz_flags) + +extern void nohz_balance_exit_idle(unsigned int cpu); +#else +static inline void nohz_balance_exit_idle(unsigned int cpu) { } #endif #ifdef CONFIG_IRQ_TIME_ACCOUNTING
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