Messages in this thread Patch in this message |  | | From | Paul Cercueil <> | Subject | [PATCH] cma: decrease CMA_ALIGNMENT lower limit to 2 | Date | Wed, 30 Sep 2020 12:28:21 +0200 |
| |
On an embedded system with a tiny (1 MiB) CMA area for video memory, and a simple enough video pipeline, we can decrease the CMA_ALIGNMENT by a factor of 2 to avoid wasting memory, as all the allocations for video buffers will be of the exact same size (dictated by the size of the screen).
Signed-off-by: Paul Cercueil <paul@crapouillou.net> --- kernel/dma/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 847a9d1fa634..f15e782e19ca 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -162,7 +162,7 @@ endchoice config CMA_ALIGNMENT int "Maximum PAGE_SIZE order of alignment for contiguous buffers" - range 4 12 + range 2 12 default 8 help DMA mapping framework by default aligns all buffers to the smallest -- 2.28.0
|  |