CONFIG_KMEMCHECK: kmemcheck: trap use of uninitialized memory

General informations

The Linux kernel configuration item CONFIG_KMEMCHECK:

• prompt: kmemcheck: trap use of uninitialized memory
• type: bool
• depends on: ( CONFIG_DEBUG_KERNEL ) && (! CONFIG_X86_USE_3DNOW ) && ( CONFIG_SLUB || CONFIG_SLAB ) && (! CONFIG_CC_OPTIMIZE_FOR_SIZE ) && (! CONFIG_FUNCTION_TRACER )
• defined in lib/Kconfig.kmemcheck
• found in Linux kernels: 2.6.31–2.6.39, 3.0–3.19, 4.0–4.14

Help text

This option enables tracing of dynamically allocated kernel memory to see if memory is used before it has been given an initial value. Be aware that this requires half of your memory for bookkeeping and will insert extra code at *every* read and write to tracked memory thus slow down the kernel code (but user code is unaffected).

The kernel may be started with kmemcheck=0 or kmemcheck=1 to disable or enable kmemcheck at boot-time. If the kernel is started with kmemcheck=0, the large memory and CPU overhead is not incurred.

Hardware

LKDDb

Raw data from LKDDb:

• (none)

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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