On 22 August 2016 at 17:06, Thierry Reding <tred...@nvidia.com> wrote: > On Fri, Aug 19, 2016 at 11:42:06PM +0800, Guodong Xu wrote: >> From: Xinliang Liu <xinliang....@linaro.org> >> >> For debian linux, cma heap is used to allocate graphic buffers. >> The default size is 16 MB which is not enought. >> So increase the size to 128 MB. >> >> Signed-off-by: Xinliang Liu <xinliang....@linaro.org> >> --- >> arch/arm64/configs/defconfig | 1 + >> 1 file changed, 1 insertion(+) > > This is a bad idea. You're increasing this heap for all users of the > default configuration (which on 64-bit ARM is everyone, really). Many of > the devices don't require the CMA except maybe for the occasional very > small buffer. Most implement some form of IOMMU support that removes the > need for large amounts of contiguous physical memory. > > I think it's a better idea to have some bootloader append a cma=128 to > the kernel command-line if necessary. >
I will remove this. Thanks. -Guodong Xu > Thierry
