CONFIG_MEMORY_NOTIFIER_ERROR_INJECT: Memory hotplug notifier error injection module

General informations

The Linux kernel configuration item CONFIG_MEMORY_NOTIFIER_ERROR_INJECT:

• prompt: Memory hotplug notifier error injection module
• type: tristate
• depends on: CONFIG_MEMORY_HOTPLUG && CONFIG_NOTIFIER_ERROR_INJECTION
• defined in lib/Kconfig.debug
• found in Linux kernels: 3.6–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD
• modules built: memory-notifier-error-inject

Help text

This option provides the ability to inject artificial errors to memory hotplug notifier chain callbacks. It is controlled through debugfs interface under /sys/kernel/debug/notifier-error-inject/memory

If the notifier call chain should be failed with some events notified, write the error code to "actions/<notifier event>/error".

Example: Inject memory hotplug offline error (-12 == -ENOMEM)

# cd /sys/kernel/debug/notifier-error-inject/memory # echo -12 > actions/MEM_GOING_OFFLINE/error # echo offline > /sys/devices/system/memory/memoryXXX/state bash: echo: write error: Cannot allocate memory

To compile this code as a module, choose M here: the module will be called memory-notifier-error-inject.

If unsure, say N.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module memory-notifier-error-inject CONFIG_MEMORY_NOTIFIER_ERROR_INJECT : lib/Kconfig.debug : "Memory hotplug notifier error injection module" # in 3.6–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

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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