I found the following thread, which explains some things. I'll post it here in case someone else was looking for an answer.
https://askubuntu.com/questions/991874/how-to-disable-page-table- isolation-to-regain-performance-lost-due-to-intel-cpu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1741609 Title: linux: 3.13.0-139.188 -proposed tracker To manage notifications about this bug go to: https://bugs.launchpad.net/kernel-sru-workflow/+bug/1741609/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
