CONFIG_DEBUG_WW_MUTEX_SLOWPATH: Wait/wound mutex debugging: Slowpath testing

General informations

The Linux kernel configuration item CONFIG_DEBUG_WW_MUTEX_SLOWPATH:

• prompt: Wait/wound mutex debugging: Slowpath testing
• type: bool
• depends on: CONFIG_DEBUG_KERNEL && CONFIG_LOCK_DEBUGGING_SUPPORT
• defined in lib/Kconfig.debug
• found in Linux kernels: 3.11–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

This feature enables slowpath testing for w/w mutex users by injecting additional -EDEADLK wound/backoff cases. Together with the full mutex checks enabled with (PROVE_LOCKING) this will test all possible w/w mutex interface abuse with the exception of simply not acquiring all the required locks. Note that this feature can introduce significant overhead, so it really should not be enabled in a production or distro kernel, even a debug kernel. If you are a driver writer, enable it. If you are a distro, do not.

Hardware

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Sources

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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