powerpc/vphn: Update CPU topology when VPHN enabled

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powerpc/vphn: On Power systems with shared configurations of CPUs
and memory, there are some issues with the association of additional
CPUs and memory to nodes when hot-adding resources.  This patch
corrects the currently broken capability to set the topology for
shared CPUs in LPARs.  At boot time for shared CPU lpars, the
topology for each CPU was being set to node zero.  Now when
numa_update_cpu_topology() is called appropriately, the Virtual
Processor Home Node (VPHN) capabilities information provided by the
pHyp allows the appropriate node in the shared configuration to be
selected for the CPU.

Signed-off-by: Michael Bringmann <mwb@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Michael Bringmann 2017-09-08 15:47:27 -05:00 • committed by Michael Ellerman

parent 733e4a4c44

commit 17f444c054

1 changed files with 21 additions and 1 deletions

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arch/powerpc/mm/numa.c

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