Changes:
* Mix checksum up a bit more and return OK if nothing has changed
* Optimize page reading, reduced by ~2% CPU
* Add perf page statistics 'p' option
* Add OOM score to VM stats
* Optimize read_maps: don't re-scan page mapping if nothing changed
* Reduce amount of seeks and reads on pagemap data
More: https://github.com/ColinIanKing/pagemon/blob/master/debian/changelog