CONFIG_DEBUG_PREEMPT: Debug preemptible kernel

General informations

The Linux kernel configuration item CONFIG_DEBUG_PREEMPT:

• prompt: Debug preemptible kernel
• type: bool
• depends on: CONFIG_DEBUG_KERNEL && CONFIG_PREEMPTION && CONFIG_TRACE_IRQFLAGS_SUPPORT
• defined in lib/Kconfig.debug
• found in Linux kernels: 2.6.11–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD

Help text

If you say Y here then the kernel will use a debug variant of the commonly used smp_processor_id() function and will print warnings if kernel code uses it in a preemption-unsafe way. Also, the kernel will detect preemption count underflows.

This option has potential to introduce high runtime overhead, depending on workload as it triggers debugging routines for each this_cpu operation. It should only be used for debugging purposes.

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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