CONFIG_HARDLOCKUP_DETECTOR_PREFER_BUDDY: Prefer the buddy CPU hardlockup detector

General informations

The Linux kernel configuration item CONFIG_HARDLOCKUP_DETECTOR_PREFER_BUDDY:

• prompt: Prefer the buddy CPU hardlockup detector
• type: bool
• depends on: ( CONFIG_HARDLOCKUP_DETECTOR ) && ( CONFIG_HAVE_HARDLOCKUP_DETECTOR_PERF && CONFIG_HAVE_HARDLOCKUP_DETECTOR_BUDDY ) && (! CONFIG_HAVE_HARDLOCKUP_DETECTOR_ARCH )
• defined in lib/Kconfig.debug
• found in Linux kernels: 6.5–6.8, 6.9-rc+HEAD

Help text

Say Y here to prefer the buddy hardlockup detector over the perf one.

With the buddy detector, each CPU uses its softlockup hrtimer to check that the next CPU is processing hrtimer interrupts by verifying that a counter is increasing.

This hardlockup detector is useful on systems that don't have an arch-specific hardlockup detector or if resources needed for the hardlockup detector are better used for other things.

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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