add cma=36M to uEnv-ext4.txt
@@ -9,4 +9,4 @@ devicetree_load_address=0x2000000
bootcmd=fatload mmc 0 ${kernel_load_address} ${kernel_image} && fatload mmc 0 ${devicetree_load_address} ${devicetree_image} && bootm ${kernel_load_address} - ${devicetree_load_address}
-bootargs=console=ttyPS0,115200 root=/dev/mmcblk0p2 ro rootfstype=ext4 earlyprintk rootwait
+bootargs=console=ttyPS0,115200 root=/dev/mmcblk0p2 ro rootfstype=ext4 earlyprintk rootwait cma=36M
