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rcu: Update documentation regarding kthread_prio cmdline parameter
Inform readers that the priority of RCU no-callback threads will also be boosted. Signed-off-by: Alison Chaiken <achaiken@aurora.tech> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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Documentation/admin-guide/kernel-parameters.txt

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(the least-favored priority). Otherwise, when
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RCU_BOOST is not set, valid values are 0-99 and
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the default is zero (non-realtime operation).
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When RCU_NOCB_CPU is set, also adjust the
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priority of NOCB callback kthreads.
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rcutree.rcu_nocb_gp_stride= [KNL]
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Set the number of NOCB callback kthreads in

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