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CONFIG_NUMA_EMU: NUMA emulation

General informations

The Linux kernel configuration item CONFIG_NUMA_EMU has multiple definitions:

NUMA emulation support found in arch/x86_64/Kconfig

The configuration item CONFIG_NUMA_EMU:

Help text

Enable NUMA emulation. A flat machine will be split into virtual nodes when booted with "numa=fake=N", where N is the number of nodes. This is only useful for debugging.

NUMA emulation found in arch/s390/Kconfig

The configuration item CONFIG_NUMA_EMU:

Help text

Numa emulation mode will split the available system memory into equal chunks which then are distributed over the configured number of nodes in a round-robin manner.

The number of fake nodes is limited by the number of available memory chunks (i.e. memory size / fake size) and the number of supported nodes in the kernel.

The CPUs are assigned to the nodes in a way that partially respects the original machine topology (if supported by the machine). Fair distribution of the CPUs is not guaranteed.

NUMA emulation found in arch/x86/Kconfig

The configuration item CONFIG_NUMA_EMU:

Help text

Enable NUMA emulation. A flat machine will be split into virtual nodes when booted with "numa=fake=N", where N is the number of nodes. This is only useful for debugging.

NUMA emulation found in arch/x86_64/Kconfig

The configuration item CONFIG_NUMA_EMU:

Help text

Enable NUMA emulation. A flat machine will be split into virtual nodes when booted with "numa=fake=N", where N is the number of nodes. This is only useful for debugging.

Hardware

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