CONFIG_CMA_SIZE_MBYTES: Size in Mega Bytes

General informations

The Linux kernel configuration item CONFIG_CMA_SIZE_MBYTES has multiple definitions:

Size in Mega Bytes found in kernel/dma/Kconfig

The configuration item CONFIG_CMA_SIZE_MBYTES:

• prompt: Size in Mega Bytes
• type: int
• depends on: (! CONFIG_CMA_SIZE_SEL_PERCENTAGE ) && ( CONFIG_X86 )
• defined in kernel/dma/Kconfig
• found in Linux kernels: 5.1–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Defines the size (in MiB) of the default memory area for Contiguous Memory Allocator. If the size of 0 is selected, CMA is disabled by default, but it can be enabled by passing cma=size[MG] to the kernel.

Size in Mega Bytes found in drivers/base/Kconfig

The configuration item CONFIG_CMA_SIZE_MBYTES:

• prompt: Size in Mega Bytes
• type: int
• depends on: (! CONFIG_CMA_SIZE_SEL_PERCENTAGE ) && ( CONFIG_X86 )
• defined in drivers/base/Kconfig
• found in Linux kernels: 3.5–3.19, 4.0–4.20, 5.0

Help text

Defines the size (in MiB) of the default memory area for Contiguous Memory Allocator. If the size of 0 is selected, CMA is disabled by default, but it can be enabled by passing cma=size[MG] to the kernel.

Hardware

LKDDb

Raw data from LKDDb:

• (none)

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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