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Edited by jernej at 2016-2-5 21:47
I found two workarounds for kswapd issue when I was doing research for my OpenELEC build. Both workarounds require compiling the kernel.
1. Lower ION memory size
2. Disable CONFIG_CMA
First option is preferred. If you won't use something like CedarX or libvdpau-sunxi, you can aggressively lower the amount of ION memory, e.g. CONFIG_ION_SUNXI_RESERVE_LIST="32M", otherwise put it to something like 128M or so. Remember, higher the number, higher the chance that kswapd will go to 100%.
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