On 07.07.20 07:59, Jia He wrote: > This exports memory_add_physaddr_to_nid() for module driver to use. > > memory_add_physaddr_to_nid() is a fallback option to get the nid in case > NUMA_NO_NID is detected. > > Suggested-by: David Hildenbrand <david@xxxxxxxxxx> > Signed-off-by: Jia He <justin.he@xxxxxxx> > --- > arch/arm64/mm/numa.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c > index aafcee3e3f7e..7eeb31740248 100644 > --- a/arch/arm64/mm/numa.c > +++ b/arch/arm64/mm/numa.c > @@ -464,10 +464,11 @@ void __init arm64_numa_init(void) > > /* > * We hope that we will be hotplugging memory on nodes we already know about, > - * such that acpi_get_node() succeeds and we never fall back to this... > + * such that acpi_get_node() succeeds. But when SRAT is not present, the node > + * id may be probed as NUMA_NO_NODE by acpi, Here provide a fallback option. > */ > int memory_add_physaddr_to_nid(u64 addr) > { > - pr_warn("Unknown node for memory at 0x%llx, assuming node 0\n", addr); > return 0; > } > +EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); > We could turn that into a pr_info() instead, but the effect is visible to user space (e.g., which memory blocks belong to which node in sysfs), so this can be debugged easily on demand. Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> -- Thanks, David / dhildenb