RCU: add help text for "RCU implementation type"
This patch supplies help text for the "RCU implementation type" kernel configuration choice. Reported-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -775,6 +775,14 @@ config PREEMPT_NOTIFIERS
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choice
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prompt "RCU implementation type:"
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default CLASSIC_RCU
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help
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This allows you to choose either the classic RCU implementation
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that is designed for best read-side performance on non-realtime
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systems, or the preemptible RCU implementation for best latency
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on realtime systems. Note that some kernel preemption modes
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will restrict your choice.
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Select the default if you are unsure.
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config CLASSIC_RCU
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bool "Classic RCU"
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