On Tue, 11 May 2021 09:31:36 +0200, Laurent Dufour wrote:

When a LPAR is migratable, we should consider the maximum possible NUMA
node instead the number of NUMA node from the actual system.

The DT property 'ibm,current-associativity-domains' is defining the maximum
number of nodes the LPAR can see when running on that box. But if the LPAR
is being migrated on another box, it may seen up to the nodes defined by
'ibm,max-associativity-domains'. So if a LPAR is migratable, that value
should be used.

[...]

Applied to powerpc/next.

[1/1] ppc64/numa: consider the max numa node for migratable LPAR
      https://git.kernel.org/powerpc/c/9c7248bb8de31f51c693bfa6a6ea53b1c07e0fa8

cheers