powerpc/numa: 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 addresses some of those problems.
First, it 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. Next, it updates the initialization checks to independently recognize PRRN or VPHN support. Next, during hotplug CPU operations, it resets the timer on topology update work function to a small value to better ensure that the CPU topology is detected and configured sooner. Also, fix an end-of-updates processing problem observed occasionally in numa_update_cpu_topology(). Signed-off-by: Michael Bringmann <m...@linux.vnet.ibm.com> Michael Bringmann (4): powerpc/vphn: Update CPU topology when VPHN enabled powerpc/vphn: Improve recognition of PRRN/VPHN powerpc/hotplug: Improve responsiveness of hotplug change powerpc/vphn: --- Changes in V13: -- Split into multiple smaller patches
