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rcu: Priority-boost-related sleeps to idle priority

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This commit converts the long-standing schedule_timeout_interruptible()
call used by RCU's priority-boosting kthreads to schedule_timeout_idle().
This conversion avoids polluting the load-average with RCU-related
sleeping.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-05-07 16:34:38 -07:00
parent 77865dea25
commit a9352f72d6
1 changed files with 1 additions and 1 deletions
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2
kernel/rcu/tree_plugin.h
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@ -1033,7 +1033,7 @@ static int rcu_boost_kthread(void *arg)
if (spincnt > 10) { if (spincnt > 10) {
WRITE_ONCE(rnp->boost_kthread_status, RCU_KTHREAD_YIELDING); WRITE_ONCE(rnp->boost_kthread_status, RCU_KTHREAD_YIELDING);
trace_rcu_utilization(TPS("End boost kthread@rcu_yield")); trace_rcu_utilization(TPS("End boost kthread@rcu_yield"));
schedule_timeout_interruptible(2); schedule_timeout_idle(2);
trace_rcu_utilization(TPS("Start boost kthread@rcu_yield")); trace_rcu_utilization(TPS("Start boost kthread@rcu_yield"));
spincnt = 0; spincnt = 0;
} }