CONFIG_PREEMPT_RT: Fully Preemptible Kernel (Real-Time)

General informations

The Linux kernel configuration item CONFIG_PREEMPT_RT:

• prompt: Fully Preemptible Kernel (Real-Time)
• type: bool
• depends on: CONFIG_EXPERT && CONFIG_ARCH_SUPPORTS_RT
• defined in kernel/Kconfig.preempt
• found in Linux kernels: 5.3–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

This option turns the kernel into a real-time kernel by replacing various locking primitives (spinlocks, rwlocks, etc.) with preemptible priority-inheritance aware variants, enforcing interrupt threading and introducing mechanisms to break up long non-preemptible sections. This makes the kernel, except for very low level and critical code paths (entry code, scheduler, low level interrupt handling) fully preemptible and brings most execution contexts under scheduler control.

Select this if you are building a kernel for systems which require real-time guarantees.

Hardware

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This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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