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hc
2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/Documentation/admin-guide/kernel-parameters.txt
....@@ -4241,10 +4241,6 @@
42414241 			value, meaning that RCU_SOFTIRQ is used by default.
42424242 			Specify rcutree.use_softirq=0 to use rcuc kthreads.
42434243 
4244
-			But note that CONFIG_PREEMPT_RT=y kernels disable
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-			this kernel boot parameter, forcibly setting it
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-			to zero.
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-
42484244 	rcutree.rcu_fanout_exact= [KNL]
42494245 			Disable autobalancing of the rcu_node combining
42504246 			tree.  This is used by rcutorture, and might
....@@ -4622,13 +4618,6 @@
46224618 			rcu_end_inkernel_boot() has been invoked), use
46234619 			only normal grace-period primitives.  No effect
46244620 			on CONFIG_TINY_RCU kernels.
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-
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-			But note that CONFIG_PREEMPT_RT=y kernels enables
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-			this kernel boot parameter, forcibly setting
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-			it to the value one, that is, converting any
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-			post-boot attempt at an expedited RCU grace
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-			period to instead use normal non-expedited
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-			grace-period processing.
46324621 
46334622 	rcupdate.rcu_task_ipi_delay= [KNL]
46344623 			Set time in jiffies during which RCU tasks will