perf-core-2020-12-14

 Core:

   - Better handling of page table leaves on archictectures which have
     architectures have non-pagetable aligned huge/large pages.  For such
     architectures a leaf can actually be part of a larger entry.

   - Prevent a deadlock vs. exec_update_mutex

 Architectures:

   - The related updates for page size calculation of leaf entries

   - The usual churn to support new CPUs

   - Small fixes and improvements all over the place