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rcu: Grace-period-kthread related sleeps to idle priority
This commit converts the long-standing schedule_timeout_interruptible() and schedule_timeout_uninterruptible() calls used by RCU's grace-period kthread to schedule_timeout_idle(). This conversion avoids polluting the load-average with RCU-related sleeping. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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88748e3300
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1 changed files with 3 additions and 3 deletions
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@ -1638,7 +1638,7 @@ static void rcu_gp_slow(int delay)
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if (delay > 0 &&
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!(rcu_seq_ctr(rcu_state.gp_seq) %
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(rcu_num_nodes * PER_RCU_NODE_PERIOD * delay)))
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schedule_timeout_uninterruptible(delay);
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schedule_timeout_idle(delay);
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}
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static unsigned long sleep_duration;
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@ -1661,7 +1661,7 @@ static void rcu_gp_torture_wait(void)
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duration = xchg(&sleep_duration, 0UL);
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if (duration > 0) {
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pr_alert("%s: Waiting %lu jiffies\n", __func__, duration);
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schedule_timeout_uninterruptible(duration);
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schedule_timeout_idle(duration);
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pr_alert("%s: Wait complete\n", __func__);
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}
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}
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@ -2727,7 +2727,7 @@ static void rcu_cpu_kthread(unsigned int cpu)
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}
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*statusp = RCU_KTHREAD_YIELDING;
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trace_rcu_utilization(TPS("Start CPU kthread@rcu_yield"));
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schedule_timeout_interruptible(2);
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schedule_timeout_idle(2);
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trace_rcu_utilization(TPS("End CPU kthread@rcu_yield"));
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*statusp = RCU_KTHREAD_WAITING;
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}
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