LPAE is the mechanism that allows 32-bit ARM to use more than 4GB of RAM. This is a useful thing to have enabled. It is currently not enabled.

<pre>
$ cat /proc/version
Linux version 4.18.6-gnu-1 (builduser@parabola) (gcc version 8.2.0 (GCC)) #1 SMP PREEMPT Sat Sep 8 15:23:19 UTC 2018
$ zgrep CONFIG_ARM_LPAE /proc/config.gz
# CONFIG_ARM_LPAE is not set
</pre>