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CONFIG_CMA: Contiguous Memory Allocator (EXPERIMENTAL)

General informations

The Linux kernel configuration item CONFIG_CMA has multiple definitions:

Contiguous Memory Allocator (EXPERIMENTAL) found in drivers/base/Kconfig

The configuration item CONFIG_CMA:

• prompt: Contiguous Memory Allocator (EXPERIMENTAL)
• type: bool
• depends on: CONFIG_HAVE_DMA_CONTIGUOUS && CONFIG_HAVE_MEMBLOCK && CONFIG_EXPERIMENTAL
• defined in drivers/base/Kconfig
• found in Linux kernels: 3.5–3.7

Help text

This enables the Contiguous Memory Allocator which allows drivers to allocate big physically-contiguous blocks of memory for use with hardware components that do not support I/O map nor scatter-gather.

For more information see <include/linux/dma-contiguous.h>. If unsure, say "n".

Contiguous Memory Allocator found in drivers/base/Kconfig

The configuration item CONFIG_CMA:

• prompt: Contiguous Memory Allocator
• type: bool
• depends on: CONFIG_HAVE_DMA_CONTIGUOUS && CONFIG_HAVE_MEMBLOCK
• defined in drivers/base/Kconfig
• found in Linux kernels: 3.8–3.9, 3.10-rc+HEAD

Help text

This enables the Contiguous Memory Allocator which allows drivers to allocate big physically-contiguous blocks of memory for use with hardware components that do not support I/O map nor scatter-gather.

For more information see <include/linux/dma-contiguous.h>. If unsure, say "n".

Hardware

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The data is retrived from:

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• Linux Kernel Driver DataBase (LKDDb)

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