People that run #Linux and care about #security must read this:
https://grsecurity.net/the_truth_about_linux_4_6.php
https://lwn.net/Articles/410674/
And the post by hansoku-make at https://www.reddit.com/r/linux/comments/64rsoh/openbsd_61_released_april_11_2017/?st=j1ezcq1u&sh=12316891