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:

Distribute interrupts on all CPUs by default found in arch/powerpc/Kconfig

The configuration item CONFIG_IRQ_ALL_CPUS:

• prompt: Distribute interrupts on all CPUs by default
• type: bool
• depends on: CONFIG_SMP
• 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, 6.0–6.12, 6.13-rc+HEAD

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.

Distribute interrupts on all CPUs by default found in arch/ppc/Kconfig

The configuration item CONFIG_IRQ_ALL_CPUS:

• prompt: Distribute interrupts on all CPUs by default
• type: bool
• depends on: CONFIG_SMP && ! CONFIG_MV64360
• defined in arch/ppc/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.26

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.

Distribute interrupts on all CPUs by default found in arch/ppc64/Kconfig

The configuration item CONFIG_IRQ_ALL_CPUS:

• prompt: Distribute interrupts on all CPUs by default
• type: bool
• depends on: CONFIG_SMP && CONFIG_PPC_MULTIPLATFORM
• defined in arch/ppc64/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.10

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.

Hardware

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The data is retrived from:

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