At some point our kernel config ended up with:
CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y # CONFIG_TRANSPARENT_HUGEPAGE_MADVISE is not set
TL;DR This is the wrong way around. We should be using madvise. Currently *all* applications are using THP which drives up memory usage, and causes issues with lockups
when copying to USB/SDHCI etc.
..Fix it. :p