CONFIG_RCU_TRACE: Enable tracing for RCU

General informations

The Linux kernel configuration item CONFIG_RCU_TRACE has multiple definitions:

Enable tracing for RCU found in kernel/rcu/Kconfig.debug

The configuration item CONFIG_RCU_TRACE:

• prompt: Enable tracing for RCU
• type: bool
• depends on: ( CONFIG_DEBUG_KERNEL ) && ( CONFIG_TREE_RCU )
• defined in kernel/rcu/Kconfig.debug
• found in Linux kernels: 4.13–4.20, 5.0–5.19, 6.0–6.17, 6.18-rc+HEAD

Help text

This option enables additional tracepoints for ftrace-style event tracing.

Say Y here if you want to enable RCU tracing Say N if you are unsure.

Enable tracing for RCU found in lib/Kconfig.debug

The configuration item CONFIG_RCU_TRACE:

• prompt: Enable tracing for RCU
• type: bool
• depends on: ( CONFIG_DEBUG_KERNEL ) && ( CONFIG_TREE_RCU )
• defined in lib/Kconfig.debug
• found in Linux kernels: 3.4–3.19, 4.0–4.12

Help text

This option provides tracing in RCU which presents stats in debugfs for debugging RCU implementation. It also enables additional tracepoints for ftrace-style event tracing.

Say Y here if you want to enable RCU tracing Say N if you are unsure.

Enable tracing for RCU found in init/Kconfig

The configuration item CONFIG_RCU_TRACE:

• prompt: Enable tracing for RCU
• type: bool
• depends on: (none)
• defined in init/Kconfig
• found in Linux kernels: 2.6.29–2.6.39, 3.0–3.3

Help text

This option provides tracing in RCU which presents stats in debugfs for debugging RCU implementation.

Say Y here if you want to enable RCU tracing Say N if you are unsure.

Enable tracing for RCU - currently stats in debugfs found in kernel/Kconfig.preempt

The configuration item CONFIG_RCU_TRACE:

• prompt: Enable tracing for RCU - currently stats in debugfs
• type: bool
• depends on: CONFIG_PREEMPT_RCU
• defined in kernel/Kconfig.preempt
• found in Linux kernels: 2.6.25–2.6.28

Help text

This option provides tracing in RCU which presents stats in debugfs for debugging RCU implementation.

Say Y here if you want to enable RCU tracing Say N if you are unsure.

Hardware

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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