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authorJean Delvare <jdelvare@suse.de>2014-10-09 15:29:41 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-09 22:26:02 -0400
commitf0d6d1f6ff6f8525cfa396ec1969b8f402391445 (patch)
tree281f528aa811d13960ae1d8cd117be432639abc6 /Documentation/kernel-parameters.txt
parent86cf78d73de8c6bfa89804b91ee0ace71a459961 (diff)
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CMA: document cma=0
It isn't obvious that CMA can be disabled on the kernel's command line, so document it. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Akinobu Mita <akinobu.mita@gmail.com> Cc: Chuck Ebbert <cebbert.lkml@gmail.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
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--- a/Documentation/kernel-parameters.txt
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@@ -656,7 +656,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
Sets the size of kernel global memory area for
contiguous memory allocations and optionally the
placement constraint by the physical address range of
- memory allocations. For more information, see
+ memory allocations. A value of 0 disables CMA
+ altogether. For more information, see
include/linux/dma-contiguous.h
cmo_free_hint= [PPC] Format: { yes | no }
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