Re: [PATCH 0/1] sched/topology: NUMA distance deduplication
On 17/03/21 20:04, Valentin Schneider wrote:
> Technically it *is* coping with it, it's just dumping the entire NUMA
> distance matrix in the process... Let me see if I can't figure out why your
> system doesn't end up with nr_node_ids=1.
>
Does the below
a) compile
b) do anything?
>From what I could gather, nothing actually tickles the possible map for
ia64. The standard pattern seems to be
node_possible_map = numa_nodes_parsed;
but here at a quick glance it seems it's online or nothing, so that's what
I went for.
HTH.
---
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index a5636524af76..e2af6b172200 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -446,7 +446,8 @@ void __init acpi_numa_fixup(void)
if (srat_num_cpus == 0) {
node_set_online(0);
node_cpuid[0].phys_id = hard_smp_processor_id();
- return;
+ slit_distance(0, 0) = LOCAL_DISTANCE;
+ goto out;
}
/*
@@ -489,7 +490,7 @@ void __init acpi_numa_fixup(void)
for (j = 0; j < MAX_NUMNODES; j++)
slit_distance(i, j) = i == j ?
LOCAL_DISTANCE : REMOTE_DISTANCE;
- return;
+ goto out;
}
memset(numa_slit, -1, sizeof(numa_slit));
@@ -514,6 +515,8 @@ void __init acpi_numa_fixup(void)
printk("\n");
}
#endif
+out:
+ node_possible_map = node_online_map;
}
#endif /* CONFIG_ACPI_NUMA */
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