powerpc/numa: document topology_updates_enabled, disable by default

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Changing the NUMA associations for CPUs and memory at runtime is
basically unsupported by the core mm, scheduler etc. We see all manner
of crashes, warnings and instability when the pseries code tries to do
this. Disable this behavior by default, and document the switch a bit.

Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Nathan Lynch 2019-04-18 13:56:58 -05:00 • committed by Michael Ellerman

parent 2d4d9b308f

commit 558f86493d

1 changed files with 10 additions and 4 deletions

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arch/powerpc/mm/numa.c

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