diff options
| author | Yajun Deng <yajun.deng@linux.dev> | 2023-07-12 15:47:58 +0800 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2023-07-31 17:54:29 +0200 |
| commit | bf29bfaa54901a4bdee2a18cd10eb951a884a5f9 (patch) | |
| tree | 830ab38ee71ea12958a18cbaa6c145c729a6ab2f /kernel/dma/Kconfig | |
| parent | 22e4a348f87c59df2c02f1efb7ba9a56b622c7b8 (diff) | |
dma-contiguous: support numa CMA for specified node
The kernel parameter 'cma_pernuma=' only supports reserving the same
size of CMA area for each node. We need to reserve different sizes of
CMA area for specified nodes if these devices belong to different nodes.
Adding another kernel parameter 'numa_cma=' to reserve CMA area for
the specified node. If we want to use one of these parameters, we need to
enable DMA_NUMA_CMA.
At the same time, print the node id in cma_declare_contiguous_nid() if
CONFIG_NUMA is enabled.
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'kernel/dma/Kconfig')
| -rw-r--r-- | kernel/dma/Kconfig | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 7afde9bc529f..562463fe30ea 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -145,15 +145,16 @@ config DMA_CMA if DMA_CMA -config DMA_PERNUMA_CMA - bool "Enable separate DMA Contiguous Memory Area for each NUMA Node" +config DMA_NUMA_CMA + bool "Enable separate DMA Contiguous Memory Area for NUMA Node" default NUMA help - Enable this option to get pernuma CMA areas so that NUMA devices + 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" - on the kernel's command line. + or set the node id and its size of CMA by specifying "numa_cma= + <node>:size[,<node>:size]" on the kernel's command line. comment "Default contiguous memory area size:" |