CONFIG_LOG_BUF_SHIFT: Kernel log buffer size (16 => 64KB, 17 => 128KB)

General informations

The Linux kernel configuration item CONFIG_LOG_BUF_SHIFT has multiple definitions:

Kernel log buffer size (16 => 64KB, 17 => 128KB) found in init/Kconfig

The configuration item CONFIG_LOG_BUF_SHIFT:

• prompt: Kernel log buffer size (16 => 64KB, 17 => 128KB)
• type: int
• depends on: CONFIG_PRINTK
• defined in init/Kconfig
• found in Linux kernels: 2.5.75, 2.6.0–2.6.11, 2.6.22–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.13

Help text

Select the minimal kernel log buffer size as a power of 2. The final size is affected by LOG_CPU_MAX_BUF_SHIFT config parameter, see below. Any higher size also might be forced by "log_buf_len" boot parameter.

Examples: 17 => 128 KB 16 => 64 KB 15 => 32 KB 14 => 16 KB 13 => 8 KB 12 => 4 KB

Kernel log buffer size (16 => 64KB, 17 => 128KB) found in lib/Kconfig.debug

The configuration item CONFIG_LOG_BUF_SHIFT:

• prompt: Kernel log buffer size (16 => 64KB, 17 => 128KB)
• type: int
• depends on: ( CONFIG_DEBUG_KERNEL ) && ( CONFIG_S390 || CONFIG_LOCKDEP ) && ( CONFIG_X86_NUMAQ || CONFIG_IA64 ) && ( CONFIG_SMP )
• defined in lib/Kconfig.debug
• found in Linux kernels: 2.6.12–2.6.21

Help text

Select kernel log buffer size as a power of 2. Defaults and Examples: 17 => 128 KB for S/390 16 => 64 KB for x86 NUMAQ or IA-64 15 => 32 KB for SMP 14 => 16 KB for uniprocessor 13 => 8 KB 12 => 4 KB

found in arch/sh64/Kconfig

The configuration item CONFIG_LOG_BUF_SHIFT:

• prompt:
• type: int
• depends on: (none)
• defined in arch/sh64/Kconfig
• found in Linux kernels: 2.6.8–2.6.13

Help text

(none)

Kernel log buffer size found in init/Kconfig

The configuration item CONFIG_LOG_BUF_SHIFT:

• prompt: Kernel log buffer size
• type: int
• depends on: ( CONFIG_DEBUG_KERNEL ) && ( CONFIG_ARCH_S390 ) && ( CONFIG_X86_NUMAQ || CONFIG_IA64 ) && ( CONFIG_SMP )
• defined in init/Kconfig
• found in Linux kernels: 2.5.59–2.5.74

Help text

Select kernel log buffer size as a power of 2. Defaults and Examples: 17 => 128 KB for S/390 16 => 64 KB for x86 NUMAQ or IA-64 15 => 32 KB for SMP 14 => 16 KB for uniprocessor 13 => 8 KB 12 => 4 KB

found in init/Kconfig

The configuration item CONFIG_LOG_BUF_SHIFT:

• prompt:
• type: int
• depends on: ( CONFIG_LOG_BUF_SHIFT_17 = CONFIG_y ) && ( CONFIG_LOG_BUF_SHIFT_16 = CONFIG_y ) && ( CONFIG_LOG_BUF_SHIFT_15 = CONFIG_y ) && ( CONFIG_LOG_BUF_SHIFT_14 = CONFIG_y ) && ( CONFIG_LOG_BUF_SHIFT_13 = CONFIG_y ) && ( CONFIG_LOG_BUF_SHIFT_12 = CONFIG_y )
• defined in init/Kconfig
• found in Linux kernels: 2.5.55–2.5.58

Help text

(none)

Hardware

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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