diff options
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 36 |
1 files changed, 10 insertions, 26 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 95e457d4ed1c..2cacc1e44a84 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -637,41 +637,25 @@ void wake_up_nohz_cpu(int cpu) wake_up_idle_cpu(cpu); } -static inline bool got_nohz_idle_kick(void) +static void nohz_csd_func(void *info) { - int cpu = smp_processor_id(); - - if (!(atomic_read(nohz_flags(cpu)) & NOHZ_KICK_MASK)) - return false; - - if (idle_cpu(cpu) && !need_resched()) - return true; + struct rq *rq = info; + int cpu = cpu_of(rq); + unsigned int flags; /* - * We can't run Idle Load Balance on this CPU for this time so we - * cancel it and clear NOHZ_BALANCE_KICK + * Release the rq::nohz_csd. */ - atomic_andnot(NOHZ_KICK_MASK, nohz_flags(cpu)); - return false; -} + flags = atomic_fetch_andnot(NOHZ_KICK_MASK, nohz_flags(cpu)); + WARN_ON(!(flags & NOHZ_KICK_MASK)); -static void nohz_csd_func(void *info) -{ - struct rq *rq = info; - - if (got_nohz_idle_kick()) { - rq->idle_balance = 1; + rq->idle_balance = idle_cpu(cpu); + if (rq->idle_balance && !need_resched()) { + rq->nohz_idle_balance = flags; raise_softirq_irqoff(SCHED_SOFTIRQ); } } -#else /* CONFIG_NO_HZ_COMMON */ - -static inline bool got_nohz_idle_kick(void) -{ - return false; -} - #endif /* CONFIG_NO_HZ_COMMON */ #ifdef CONFIG_NO_HZ_FULL |