CONFIG_CRASH_DUMP: kernel crash dumps

General informations

The Linux kernel configuration item CONFIG_CRASH_DUMP has multiple definitions:

kernel crash dumps found in kernel/Kconfig.kexec

The configuration item CONFIG_CRASH_DUMP:

• prompt: kernel crash dumps
• type: bool
• depends on: ( CONFIG_ARCH_SUPPORTS_CRASH_DUMP ) && ( CONFIG_KEXEC_CORE )
• defined in kernel/Kconfig.kexec
• found in Linux kernels: 6.6–6.17, 6.18-rc+HEAD

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. The crash dump kernel must be compiled to a memory address not used by the main kernel or BIOS using PHYSICAL_START, or it must be built as a relocatable image (RELOCATABLE=y). For more details see Documentation/admin-guide/kdump/kdump.rst

For s390, this option also enables zfcpdump. See also Documentation/arch/s390/zfcpdump.rst

Build kdump crash kernel (EXPERIMENTAL) found in arch/arm/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: Build kdump crash kernel (EXPERIMENTAL)
• type: bool
• depends on: (none)
• defined in arch/arm/Kconfig
• found in Linux kernels: 2.6.38–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.5

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. The crash dump kernel must be compiled to a memory address not used by the main kernel

For more details see Documentation/admin-guide/kdump/kdump.rst

kernel crash dumps (EXPERIMENTAL) found in arch/sh/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: kernel crash dumps (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_BROKEN_ON_SMP
• defined in arch/sh/Kconfig
• found in Linux kernels: 2.6.22–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.5

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. The crash dump kernel must be compiled to a memory address not used by the main kernel using PHYSICAL_START.

For more details see Documentation/admin-guide/kdump/kdump.rst

Build a dump capture kernel found in arch/powerpc/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: Build a dump capture kernel
• type: bool
• depends on: CONFIG_PPC64 || CONFIG_PPC_BOOK3S_32 || CONFIG_PPC_85xx || ( CONFIG_44x && ! CONFIG_SMP )
• defined in arch/powerpc/Kconfig
• found in Linux kernels: 4.12–4.20, 5.0–5.19, 6.0–6.5

Help text

Build a kernel suitable for use as a dump capture kernel. The same kernel binary can be used as production kernel and dump capture kernel.

Build kdump crash kernel found in arch/riscv/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: Build kdump crash kernel
• type: bool
• depends on: (none)
• defined in arch/riscv/Kconfig
• found in Linux kernels: 5.13–5.19, 6.0–6.5

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec.

For more details see Documentation/admin-guide/kdump/kdump.rst

Build kdump crash kernel found in arch/loongarch/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: Build kdump crash kernel
• type: bool
• depends on: (none)
• defined in arch/loongarch/Kconfig
• found in Linux kernels: 6.1–6.5

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec.

For more details see Documentation/admin-guide/kdump/kdump.rst

Build kdump crash kernel found in arch/arm64/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: Build kdump crash kernel
• type: bool
• depends on: (none)
• defined in arch/arm64/Kconfig
• found in Linux kernels: 4.12–4.20, 5.0–5.19, 6.0–6.5

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec.

For more details see Documentation/admin-guide/kdump/kdump.rst

kernel crash dumps found in arch/x86/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: kernel crash dumps
• type: bool
• depends on: CONFIG_X86_64 || ( CONFIG_X86_32 && CONFIG_HIGHMEM )
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.27–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.5

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. The crash dump kernel must be compiled to a memory address not used by the main kernel or BIOS using PHYSICAL_START, or it must be built as a relocatable image (RELOCATABLE=y). For more details see Documentation/admin-guide/kdump/kdump.rst

kernel crash dumps found in arch/s390/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: kernel crash dumps
• type: bool
• depends on: (none)
• defined in arch/s390/Kconfig
• found in Linux kernels: 3.2–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.5

Help text

Generate crash dump after being started by kexec. Crash dump kernels are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. Refer to Documentation/s390/zfcpdump.rst for more details on this. This option also enables s390 zfcpdump. See also Documentation/s390/zfcpdump.rst

Kernel crash dumps found in arch/mips/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: Kernel crash dumps
• type: bool
• depends on: (none)
• defined in arch/mips/Kconfig
• found in Linux kernels: 3.8–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.5

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. The crash dump kernel must be compiled to a memory address not used by the main kernel or firmware using PHYSICAL_START.

kernel crash dumps found in arch/ia64/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: kernel crash dumps
• type: bool
• depends on: CONFIG_IA64_MCA_RECOVERY && (! CONFIG_SMP || CONFIG_HOTPLUG_CPU )
• defined in arch/ia64/Kconfig
• found in Linux kernels: 2.6.27–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.5

Help text

Generate crash dump after being started by kexec.

Build a kdump crash kernel found in arch/powerpc/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: Build a kdump crash kernel
• type: bool
• depends on: CONFIG_PPC64 || CONFIG_6xx || CONFIG_FSL_BOOKE || ( CONFIG_44x && ! CONFIG_SMP )
• defined in arch/powerpc/Kconfig
• found in Linux kernels: 2.6.27–2.6.39, 3.0–3.19, 4.0–4.11

Help text

Build a kernel suitable for use as a kdump capture kernel. The same kernel binary can be used as production kernel and dump capture kernel.

Build a kdump crash kernel (EXPERIMENTAL) found in arch/powerpc/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: Build a kdump crash kernel (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_PPC_MULTIPLATFORM && CONFIG_PPC64 && CONFIG_EXPERIMENTAL
• defined in arch/powerpc/Kconfig
• found in Linux kernels: 2.6.16–2.6.26

Help text

Build a kernel suitable for use as a kdump capture kernel. The kernel will be linked at a different address than normal, and so can only be used for Kdump.

Don't change this unless you know what you are doing.

kernel crash dumps (EXPERIMENTAL) found in arch/x86/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: kernel crash dumps (EXPERIMENTAL)
• type: bool
• depends on: ( CONFIG_EXPERIMENTAL ) && ( CONFIG_X86_64 || ( CONFIG_X86_32 && CONFIG_HIGHMEM ))
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.24–2.6.26

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. The crash dump kernel must be compiled to a memory address not used by the main kernel or BIOS using PHYSICAL_START, or it must be built as a relocatable image (RELOCATABLE=y). For more details see Documentation/kdump/kdump.txt

kernel crash dumps (EXPERIMENTAL) found in arch/ia64/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: kernel crash dumps (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_EXPERIMENTAL && CONFIG_IA64_MCA_RECOVERY && ! CONFIG_IA64_HP_SIM && (! CONFIG_SMP || CONFIG_HOTPLUG_CPU )
• defined in arch/ia64/Kconfig
• found in Linux kernels: 2.6.20–2.6.26

Help text

Generate crash dump after being started by kexec.

kernel crash dumps (EXPERIMENTAL) found in arch/x86_64/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: kernel crash dumps (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_EXPERIMENTAL
• defined in arch/x86_64/Kconfig
• found in Linux kernels: 2.6.16–2.6.23

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. The crash dump kernel must be compiled to a memory address not used by the main kernel or BIOS using PHYSICAL_START. For more details see Documentation/kdump/kdump.txt

kernel crash dumps (EXPERIMENTAL) found in arch/i386/Kconfig

The configuration item CONFIG_CRASH_DUMP:

• prompt: kernel crash dumps (EXPERIMENTAL)
• type: bool
• depends on: ( CONFIG_EXPERIMENTAL ) && ( CONFIG_HIGHMEM )
• defined in arch/i386/Kconfig
• found in Linux kernels: 2.6.13–2.6.23

Help text

Generate crash dump after being started by kexec. This should be normally only set in special crash dump kernels which are loaded in the main kernel with kexec-tools into a specially reserved region and then later executed after a crash by kdump/kexec. The crash dump kernel must be compiled to a memory address not used by the main kernel or BIOS using PHYSICAL_START. For more details see Documentation/kdump/kdump.txt

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