CONFIG_DMA_NUMA_CMA: Enable separate DMA Contiguous Memory Area for NUMA Node

General informations

The Linux kernel configuration item CONFIG_DMA_NUMA_CMA:

• prompt: Enable separate DMA Contiguous Memory Area for NUMA Node
• type: bool
• depends on: CONFIG_NUMA
• defined in kernel/dma/Kconfig
• found in Linux kernels: 6.6–6.8, 6.9-rc+HEAD

Help text

Enable this option to get numa CMA areas so that NUMA devices can get local memory by DMA coherent APIs.

You can set the size of pernuma CMA by specifying "cma_pernuma=size" or set the node id and its size of CMA by specifying "numa_cma= <node>:size[,<node>:size]" on the kernel's command line.

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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