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CONFIG_TREE_PREEMPT_RCU: Preemptible tree-based hierarchical RCU

General informations

The Linux kernel configuration item CONFIG_TREE_PREEMPT_RCU has multiple definitions:

Preemptable tree-based hierarchical RCU found in init/Kconfig

The configuration item CONFIG_TREE_PREEMPT_RCU:

• prompt: Preemptable tree-based hierarchical RCU
• type: bool
• depends on: CONFIG_PREEMPT
• defined in init/Kconfig
• found in Linux kernels: 2.6.32–2.6.36

Help text

This option selects the RCU implementation that is designed for very large SMP systems with hundreds or thousands of CPUs, but for which real-time response is also required. It also scales down nicely to smaller systems.

Preemptible tree-based hierarchical RCU found in init/Kconfig

The configuration item CONFIG_TREE_PREEMPT_RCU:

• prompt: Preemptible tree-based hierarchical RCU
• type: bool
• depends on: CONFIG_PREEMPT
• defined in init/Kconfig
• found in Linux kernels: 2.6.37–2.6.39, 3.0–3.9, 3.10-rc+HEAD

Help text

This option selects the RCU implementation that is designed for very large SMP systems with hundreds or thousands of CPUs, but for which real-time response is also required. It also scales down nicely to smaller systems.

Select this option if you are unsure.

Hardware

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• Linux Kernel Driver DataBase (LKDDb)

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