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CONFIG_MEMCG_KMEM: Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)

General informations

The Linux kernel configuration item CONFIG_MEMCG_KMEM has multiple definitions:

Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL) found in init/Kconfig

The configuration item CONFIG_MEMCG_KMEM:

Help text

The Kernel Memory extension for Memory Resource Controller can limit the amount of memory used by kernel objects in the system. Those are fundamentally different from the entities handled by the standard Memory Controller, which are page-based, and can be swapped. Users of the kmem extension can use it to guarantee that no group of processes will ever exhaust kernel resources alone.

Memory Resource Controller Kernel Memory accounting found in init/Kconfig

The configuration item CONFIG_MEMCG_KMEM:

Help text

The Kernel Memory extension for Memory Resource Controller can limit the amount of memory used by kernel objects in the system. Those are fundamentally different from the entities handled by the standard Memory Controller, which are page-based, and can be swapped. Users of the kmem extension can use it to guarantee that no group of processes will ever exhaust kernel resources alone.

WARNING: Current implementation lacks reclaim support. That means allocation attempts will fail when close to the limit even if there are plenty of kmem available for reclaim. That makes this option unusable in real life so DO NOT SELECT IT unless for development purposes.

Hardware

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