The problem with NUMA distances in the SLIT is that they are often wrong, oh
wait they aren't there at all because the BIOS didn't create a SLIT since
Windows does not use it. If Linux does not find a slit it just says the
distance to local=10 and remote=20 according to ACPI spec. The problem is
when we have a 4P system (or larger), there is generally one node where we
have two hops and its distance should be >20.
Following are patches to first fake the SLIT in the ACPI code and then add
ability to write the distances from sysfs.
-Joachim
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