CONFIG_HOTPLUG_CPU: Support for hot-pluggable CPUs (EXPERIMENTAL)

General informations

The Linux kernel configuration item CONFIG_HOTPLUG_CPU has multiple definitions:

Support for hot-pluggable CPUs (EXPERIMENTAL) found in arch/sh/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_SMP
• defined in arch/sh/Kconfig
• found in Linux kernels: 2.6.35–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu.

Support for enabling/disabling CPUs found in arch/powerpc/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for enabling/disabling CPUs
• type: bool
• depends on: CONFIG_SMP && ( CONFIG_PPC_PSERIES || \
• defined in arch/powerpc/Kconfig
• found in Linux kernels: 2.6.15–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to be able to disable and re-enable individual CPUs at runtime on SMP machines.

Say N if you are unsure.

Support for hot-pluggable CPUs found in arch/sparc/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SPARC64 && CONFIG_SMP
• defined in arch/sparc/Kconfig
• found in Linux kernels: 2.6.29–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs found in arch/riscv/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP
• defined in arch/riscv/Kconfig
• found in Linux kernels: 5.7–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu.

Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs found in arch/mips/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP && CONFIG_SYS_SUPPORTS_HOTPLUG_CPU
• defined in arch/mips/Kconfig
• found in Linux kernels: 2.6.31–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to allow turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. (Note: power management support will enable this option automatically on SMP systems. ) Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs found in arch/loongarch/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP
• defined in arch/loongarch/Kconfig
• found in Linux kernels: 5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to allow turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. (Note: power management support will enable this option automatically on SMP systems. ) Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs found in arch/csky/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP
• defined in arch/csky/Kconfig
• found in Linux kernels: 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to allow turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu1/hotplug/target.

Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs found in arch/arm64/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: (none)
• defined in arch/arm64/Kconfig
• found in Linux kernels: 3.13–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu.

Support for hot-pluggable CPUs found in arch/arm/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP
• defined in arch/arm/Kconfig
• found in Linux kernels: 3.7–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu.

Enable CPU hotplug support found in arch/xtensa/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Enable CPU hotplug support
• type: bool
• depends on: CONFIG_SMP
• defined in arch/xtensa/Kconfig
• found in Linux kernels: 3.14–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Say Y here to allow turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu.

Say N if you want to disable CPU hotplug.

found in arch/x86/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt:
• type: bool
• depends on: CONFIG_SMP
• defined in arch/x86/Kconfig
• found in Linux kernels: 5.1–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

(none)

found in arch/s390/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt:
• type: bool
• depends on: (none)
• defined in arch/s390/Kconfig
• found in Linux kernels: 5.3–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

(none)

found in arch/parisc/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt:
• type: bool
• depends on: CONFIG_SMP
• defined in arch/parisc/Kconfig
• found in Linux kernels: 2.6.8–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

(none)

Support for hot-pluggable CPUs found in arch/ia64/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP
• defined in arch/ia64/Kconfig
• found in Linux kernels: 3.9–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.6

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs found in arch/s390/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP
• defined in arch/s390/Kconfig
• found in Linux kernels: 2.6.12–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.2

Help text

Say Y here to be able to turn CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs found in arch/x86/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.28–2.6.39, 3.0–3.19, 4.0–4.20, 5.0

Help text

Say Y here to allow turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. ( Note: power management support will enable this option automatically on SMP systems. ) Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs found in arch/blackfin/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP
• defined in arch/blackfin/Kconfig
• found in Linux kernels: 2.6.34–2.6.39, 3.0–3.19, 4.0–4.16

Help text

(none)

Enable CPU hotplug support found in arch/metag/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Enable CPU hotplug support
• type: bool
• depends on: CONFIG_SMP
• defined in arch/metag/Kconfig
• found in Linux kernels: 3.9–3.19, 4.0–4.16

Help text

Say Y here to allow turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu.

Say N if you want to disable CPU hotplug.

found in arch/mn10300/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt:
• type: bool
• depends on: (none)
• defined in arch/mn10300/Kconfig
• found in Linux kernels: 2.6.25–2.6.39, 3.0–3.19, 4.0–4.16

Help text

(none)

Support for hot-pluggable CPUs (EXPERIMENTAL) found in arch/ia64/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_SMP && CONFIG_EXPERIMENTAL
• defined in arch/ia64/Kconfig
• found in Linux kernels: 2.6.7–2.6.39, 3.0–3.8

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs (EXPERIMENTAL) found in arch/arm/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_SMP && CONFIG_HOTPLUG && CONFIG_EXPERIMENTAL
• defined in arch/arm/Kconfig
• found in Linux kernels: 2.6.15–2.6.39, 3.0–3.6

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu.

found in arch/mips/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt:
• type: bool
• depends on: (none)
• defined in arch/mips/Kconfig
• found in Linux kernels: 2.6.23–2.6.30

Help text

(none)

Support for hot-pluggable CPUs found in arch/sparc64/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP
• defined in arch/sparc64/Kconfig
• found in Linux kernels: 2.6.23–2.6.28

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. Say N if you want to disable CPU hotplug.

Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL) found in arch/x86/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_SMP && CONFIG_HOTPLUG && CONFIG_EXPERIMENTAL && ! CONFIG_X86_VOYAGER
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.24–2.6.27

Help text

Say Y here to experiment with turning CPUs off and on, and to enable suspend on SMP systems. CPUs can be controlled through /sys/devices/system/cpu. Say N if you want to disable CPU hotplug and don't need to suspend.

Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL) found in arch/x86_64/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_SMP && CONFIG_HOTPLUG && CONFIG_EXPERIMENTAL
• defined in arch/x86_64/Kconfig
• found in Linux kernels: 2.6.22–2.6.23

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. This is also required for suspend/hibernation on SMP systems.

Say N if you want to disable CPU hotplug and don't need to suspend.

Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL) found in arch/i386/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_SMP && CONFIG_HOTPLUG && CONFIG_EXPERIMENTAL && ! CONFIG_X86_VOYAGER
• defined in arch/i386/Kconfig
• found in Linux kernels: 2.6.22–2.6.23

Help text

Say Y here to experiment with turning CPUs off and on, and to enable suspend on SMP systems. CPUs can be controlled through /sys/devices/system/cpu.

Support for hot-pluggable CPUs (EXPERIMENTAL) found in arch/x86_64/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_SMP && CONFIG_HOTPLUG && CONFIG_EXPERIMENTAL
• defined in arch/x86_64/Kconfig
• found in Linux kernels: 2.6.13–2.6.21

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. Say N if you want to disable CPU hotplug.

Support for hot-pluggable CPUs (EXPERIMENTAL) found in arch/i386/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_SMP && CONFIG_HOTPLUG && CONFIG_EXPERIMENTAL && ! CONFIG_X86_VOYAGER
• defined in arch/i386/Kconfig
• found in Linux kernels: 2.6.13–2.6.21

Help text

Say Y here to experiment with turning CPUs off and on, and to enable suspend on SMP systems. CPUs can be controlled through /sys/devices/system/cpu.

Support for enabling/disabling CPUs found in arch/ppc/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for enabling/disabling CPUs
• type: bool
• depends on: CONFIG_SMP && CONFIG_HOTPLUG && CONFIG_EXPERIMENTAL && CONFIG_PPC_PMAC
• defined in arch/ppc/Kconfig
• found in Linux kernels: 2.6.14–2.6.15

Help text

Say Y here to be able to disable and re-enable individual CPUs at runtime on SMP machines.

Say N if you are unsure.

Support for hot-pluggable CPUs found in arch/ppc64/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs
• type: bool
• depends on: CONFIG_SMP && CONFIG_EXPERIMENTAL && ( CONFIG_PPC_PSERIES || CONFIG_PPC_PMAC )
• defined in arch/ppc64/Kconfig
• found in Linux kernels: 2.6.6–2.6.14

Help text

Say Y here to be able to turn CPUs off and on.

Say N if you are unsure.

Support for hot-pluggable CPUs (EXPERIMENTAL) found in arch/s390/Kconfig

The configuration item CONFIG_HOTPLUG_CPU:

• prompt: Support for hot-pluggable CPUs (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_SMP && CONFIG_EXPERIMENTAL
• defined in arch/s390/Kconfig
• found in Linux kernels: 2.6.8–2.6.11

Help text

Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu/cpu#. Say N if you want to disable CPU hotplug.

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