CONFIG_K8_NUMA: Old style AMD Opteron NUMA detection

General informations

The Linux kernel configuration item CONFIG_K8_NUMA has multiple definitions:

Old style AMD Opteron NUMA detection found in arch/x86/Kconfig

The configuration item CONFIG_K8_NUMA:

• prompt: Old style AMD Opteron NUMA detection
• type: bool
• depends on: CONFIG_X86_64 && CONFIG_NUMA && CONFIG_PCI
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.24–2.6.37

Help text

Enable K8 NUMA node topology detection. You should say Y here if you have a multi processor AMD K8 system. This uses an old method to read the NUMA configuration directly from the builtin Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA instead, which also takes priority if both are compiled in.

Old style AMD Opteron NUMA detection found in arch/x86_64/Kconfig

The configuration item CONFIG_K8_NUMA:

• prompt: Old style AMD Opteron NUMA detection
• type: bool
• depends on: CONFIG_NUMA && CONFIG_PCI
• defined in arch/x86_64/Kconfig
• found in Linux kernels: 2.6.15–2.6.23

Help text

Enable K8 NUMA node topology detection. You should say Y here if you have a multi processor AMD K8 system. This uses an old method to read the NUMA configuration directly from the builtin Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA instead, which also takes priority if both are compiled in.

K8 NUMA support found in arch/x86_64/Kconfig

The configuration item CONFIG_K8_NUMA:

• prompt: K8 NUMA support
• type: bool
• depends on: CONFIG_SMP
• defined in arch/x86_64/Kconfig
• found in Linux kernels: 2.5.61–2.5.75, 2.6.0–2.6.14

Help text

Enable NUMA (Non Unified Memory Architecture) support for AMD Opteron Multiprocessor systems. The kernel will try to allocate memory used by a CPU on the local memory controller of the CPU and add some more NUMA awareness to the kernel. This code is recommended on all multiprocessor Opteron systems and normally doesn't hurt on others.

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The data is retrived from:

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• Linux Kernel Driver DataBase (LKDDb)

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