Commit 0de32796 authored Sep 30, 2020 by Paul Cercueil Committed by Christoph Hellwig Oct 06, 2020

cma: decrease CMA_ALIGNMENT lower limit to 2



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>
Signed-off-by: Christoph Hellwig <hch@lst.de>

parent c51a9868

kernel/dma/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -177,7 +177,7 @@ 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

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