From 6398eaa268168b528dd1d3d0e70e61e9c13bea23 Mon Sep 17 00:00:00 2001 From: Srikar Dronamraju Date: Tue, 18 Aug 2020 13:41:03 +0530 Subject: [PATCH] powerpc/numa: Prefer node id queried from vphn Node id queried from the static device tree may not be correct. For example: it may always show 0 on a shared processor. Hence prefer the node id queried from vphn and fallback on the device tree based node id if vphn query fails. Signed-off-by: Srikar Dronamraju Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200818081104.57888-3-srikar@linux.vnet.ibm.com --- arch/powerpc/mm/numa.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index f63e1a4..9f0127c 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -728,21 +728,22 @@ static int __init parse_numa_properties(void) */ for_each_present_cpu(i) { struct device_node *cpu; - int nid; - - cpu = of_get_cpu_node(i, NULL); - BUG_ON(!cpu); - nid = of_node_to_nid_single(cpu); - of_node_put(cpu); + int nid = vphn_get_nid(i); /* * Don't fall back to default_nid yet -- we will plug * cpus into nodes once the memory scan has discovered * the topology. */ - if (nid < 0) - continue; - node_set_online(nid); + if (nid == NUMA_NO_NODE) { + cpu = of_get_cpu_node(i, NULL); + BUG_ON(!cpu); + nid = of_node_to_nid_single(cpu); + of_node_put(cpu); + } + + if (likely(nid > 0)) + node_set_online(nid); } get_n_mem_cells(&n_mem_addr_cells, &n_mem_size_cells); -- 2.7.4