CONFIG_ISR_STACK_SIZE

ISR and initialization stack size (in bytes)

Type: int

Help

This option specifies the size of the stack used by interrupt service routines (ISRs), and during kernel initialization.

Defaults

• 4096

• 4096

• 16384

• 2048

Kconfig definitions

At arch/arm/core/aarch64/Kconfig:38

Included via Kconfig:8 → Kconfig.zephyr:29 → arch/Kconfig:12 → arch/arm/Kconfig:46

Menu path: (Top) → ARM Options

config ISR_STACK_SIZE
    int
    default 4096
    depends on ARM64 && ARM

---

At arch/sparc/Kconfig:48

Included via Kconfig:8 → Kconfig.zephyr:29 → arch/Kconfig:12

Menu path: (Top) → SPARC Options

config ISR_STACK_SIZE
    int
    default 4096
    depends on SPARC

---

At arch/x86/core/Kconfig.intel64:14

Included via Kconfig:8 → Kconfig.zephyr:29 → arch/Kconfig:12 → arch/x86/Kconfig:320

Menu path: (Top) → X86 Architecture Options

config ISR_STACK_SIZE
    int
    default 16384
    depends on X86_64 && X86

---

At kernel/Kconfig:177

Included via Kconfig:8 → Kconfig.zephyr:30

Menu path: (Top) → General Kernel Options

config ISR_STACK_SIZE
    int "ISR and initialization stack size (in bytes)"
    default 2048
    help
      This option specifies the size of the stack used by interrupt
      service routines (ISRs), and during kernel initialization.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)