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CONFIG_RCU_EXP_KTHREAD: Perform RCU expedited work in a real-time kthread

General informations

The Linux kernel configuration item CONFIG_RCU_EXP_KTHREAD:

Help text

Use this option to further reduce the latencies of expedited grace periods at the expense of being more disruptive.

This option is disabled by default on PREEMPT_RT=y kernels which disable expedited grace periods after boot by unconditionally setting rcupdate.rcu_normal_after_boot=1.

Accept the default if unsure.

Hardware

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