More on Meltdown issues. Some Intel CPUs (old and new) have reboots after patching. http://www.zdnet.com/article/meltdown-spectre-intel-says-newer-chips-also-hit-by-unwanted-reboots-after-patch/ Also down in the article there is a table on the performance hit for different loads. It is by Intel, so take that with a grain of salt.