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CONFIG_IRQ_ALL_CPUS: Distribute interrupts on all CPUs by default

General informations

The Linux kernel configuration item CONFIG_IRQ_ALL_CPUS has multiple definitions:

arch/powerpc/Kconfig

The configuration item CONFIG_IRQ_ALL_CPUS:

prompt: Distribute interrupts on all CPUs by default
type: tristate
depends on: CONFIG_SMP && ! CONFIG_MV64360
defined in arch/powerpc/Kconfig
found in Linux Kernels: before 2.6.0 version still available on 2.6.28 release

Help text

This option gives the kernel permission to distribute IRQs across multiple CPUs. Saying N here will route all IRQs to the first CPU. Generally saying Y is safe, although some problems have been reported with SMP Power Macintoshes with this option enabled.

arch/ppc64/Kconfig

The configuration item CONFIG_IRQ_ALL_CPUS:

prompt: Distribute interrupts on all CPUs by default
type: tristate
depends on: CONFIG_SMP && CONFIG_PPC_MULTIPLATFORM
defined in arch/ppc64/Kconfig
found in Linux Kernels: before 2.6.0 version still available on 2.6.28 release

Help text

This option gives the kernel permission to distribute IRQs across multiple CPUs. Saying N here will route all IRQs to the first CPU.

arch/ppc/Kconfig

The configuration item CONFIG_IRQ_ALL_CPUS:

prompt: Distribute interrupts on all CPUs by default
type: tristate
depends on: CONFIG_SMP
defined in arch/ppc/Kconfig
found in Linux Kernels: before 2.6.0 version still available on 2.6.28 release

Help text

Hardware

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Sources

Linux Kernel
Linux Kernel Driver DataBase (LKDDb)

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