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CONFIG_RCU_NOCB_CPU_CB_BOOST: Offload RCU callback from real-time kthread

General informations

The Linux kernel configuration item CONFIG_RCU_NOCB_CPU_CB_BOOST:

Help text

Use this option to invoke offloaded callbacks as SCHED_FIFO to avoid starvation by heavy SCHED_OTHER background load. Of course, running as SCHED_FIFO during callback floods will cause the rcuo[ps] kthreads to monopolize the CPU for hundreds of milliseconds or more. Therefore, when enabling this option, it is your responsibility to ensure that latency-sensitive tasks either run with higher priority or run on some other CPU.

Say Y here if you want to set RT priority for offloading kthreads. Say N here if you are building a !PREEMPT_RT kernel and are unsure.



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