The patch titled
Subject: powerpc/numa: prefer node id queried from vphn
has been added to the -mm tree. Its filename is
powerpc-numa-prefer-node-id-queried-from-vphn.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-numa-prefer-node-id-queried-from-vphn.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-numa-prefer-node-id-queried-from-vphn.patch
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------------------------------------------------------
From: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Subject: 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.
Link: http://lkml.kernel.org/r/20200624092846.9194-3-srikar@xxxxxxxxxxxxxxxxxx
Signed-off-by: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: Christopher Lameter <cl@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Gautham R Shenoy <ego@xxxxxxxxxxxxxxxxxx>
Cc: Satheesh Rajendran <sathnaga@xxxxxxxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/numa.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
--- a/arch/powerpc/mm/numa.c~powerpc-numa-prefer-node-id-queried-from-vphn
+++ a/arch/powerpc/mm/numa.c
@@ -724,21 +724,22 @@ static int __init parse_numa_properties(
*/
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);
_
Patches currently in -mm which might be from srikar@xxxxxxxxxxxxxxxxxx are
powerpc-numa-set-numa_node-for-all-possible-cpus.patch
powerpc-numa-prefer-node-id-queried-from-vphn.patch
mm-page_alloc-keep-memoryless-cpuless-node-0-offline.patch
