CONFIG_DEBUG_KMEMLEAK: Kernel memory leak detector

General informations

The Linux kernel configuration item CONFIG_DEBUG_KMEMLEAK has multiple definitions:

Kernel memory leak detector found in mm/Kconfig.debug

The configuration item CONFIG_DEBUG_KMEMLEAK:

• prompt: Kernel memory leak detector
• type: bool
• depends on: CONFIG_DEBUG_KERNEL && CONFIG_HAVE_DEBUG_KMEMLEAK
• defined in mm/Kconfig.debug
• found in Linux kernels: 6.3–6.12

Help text

Say Y here if you want to enable the memory leak detector. The memory allocation/freeing is traced in a way similar to the Boehm's conservative garbage collector, the difference being that the orphan objects are not freed but only shown in /sys/kernel/debug/kmemleak. Enabling this feature will introduce an overhead to memory allocations. See Documentation/dev-tools/kmemleak.rst for more details.

Enabling SLUB_DEBUG may increase the chances of finding leaks due to the slab objects poisoning.

In order to access the kmemleak file, debugfs needs to be mounted (usually at /sys/kernel/debug).

Kernel memory leak detector found in lib/Kconfig.debug

The configuration item CONFIG_DEBUG_KMEMLEAK:

• prompt: Kernel memory leak detector
• type: bool
• depends on: CONFIG_DEBUG_KERNEL && CONFIG_HAVE_DEBUG_KMEMLEAK
• defined in lib/Kconfig.debug
• found in Linux kernels: 2.6.31–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.2, 6.2+HEAD

Help text

Say Y here if you want to enable the memory leak detector. The memory allocation/freeing is traced in a way similar to the Boehm's conservative garbage collector, the difference being that the orphan objects are not freed but only shown in /sys/kernel/debug/kmemleak. Enabling this feature will introduce an overhead to memory allocations. See Documentation/dev-tools/kmemleak.rst for more details.

Enabling DEBUG_SLAB or SLUB_DEBUG may increase the chances of finding leaks due to the slab objects poisoning.

In order to access the kmemleak file, debugfs needs to be mounted (usually at /sys/kernel/debug).

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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