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rcu: Expedited grace-period sleeps to idle priority 

This commit converts the schedule_timeout_uninterruptible() call used
by RCU's expedited grace-period processing to schedule_timeout_idle().
This conversion avoids polluting the load-average with RCU-related
sleeping.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
zero-sugar-mainline-defconfig
Paul E. McKenney 2020-05-07 16:38:29 -07:00
parent f5ca34643b
commit 68c2f27e01
1 changed files with 1 additions and 1 deletions
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2
kernel/rcu/tree_exp.h
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@ -403,7 +403,7 @@ retry_ipi:
/* Online, so delay for a bit and try again. */
raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
trace_rcu_exp_grace_period(rcu_state.name, rcu_exp_gp_seq_endval(), TPS("selectofl"));
schedule_timeout_uninterruptible(1);
schedule_timeout_idle(1);
goto retry_ipi;
}
/* CPU really is offline, so we must report its QS. */