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SubjectRe: [PATCH RFC 3/5] powerpc:numa create 1:1 mappaing between chipid and nid
On 27.09.2015 [23:59:11 +0530], Raghavendra K T wrote:
> Once we have made the distinction between nid and chipid
> create a 1:1 mapping between them. This makes compacting the
> nids easy later.


Didn't the previous patch just do the opposite of...

> @@ -286,7 +308,7 @@ int of_node_to_nid(struct device_node *device)
>
> of_node_get(device);
> while (device) {
> - nid = of_node_to_chipid_single(device);
> + nid = of_node_to_nid_single(device);
> if (nid != -1)
> break;
>
> @@ -498,7 +520,7 @@ static int of_get_assoc_arrays(struct device_node *memory,
> }
>
> /*
> - * This is like of_node_to_chipid_single() for memory represented in the
> + * This is like of_node_to_nid_single() for memory represented in the
> * ibm,dynamic-reconfiguration-memory node.
> */
> static int of_drconf_to_nid_single(struct of_drconf_cell *drmem,
> @@ -557,7 +579,7 @@ static int numa_setup_cpu(unsigned long lcpu)
> goto out;
> }
>
> - nid = of_node_to_chipid_single(cpu);
> + nid = of_node_to_nid_single(cpu);
>
> out_present:
> if (nid < 0 || !node_online(nid))
> @@ -754,7 +776,7 @@ static int __init parse_numa_properties(void)
>
> cpu = of_get_cpu_node(i, NULL);
> BUG_ON(!cpu);
> - nid = of_node_to_chipid_single(cpu);
> + nid = of_node_to_nid_single(cpu);
> of_node_put(cpu);
>
> /*
> @@ -796,7 +818,7 @@ new_range:
> * have associativity properties. If none, then
> * everything goes to default_nid.
> */
> - nid = of_node_to_chipid_single(memory);
> + nid = of_node_to_nid_single(memory);
> if (nid < 0)
> nid = default_nid;
>
> @@ -1119,7 +1141,7 @@ static int hot_add_node_scn_to_nid(unsigned long scn_addr)
> if ((scn_addr < start) || (scn_addr >= (start + size)))
> continue;
>
> - nid = of_node_to_chipid_single(memory);
> + nid = of_node_to_nid_single(memory);
> break;
> }
>
> @@ -1415,7 +1437,7 @@ int arch_update_cpu_topology(void)
>
> /* Use associativity from first thread for all siblings */
> vphn_get_associativity(cpu, associativity);
> - new_nid = associativity_to_chipid(associativity);
> + new_nid = associativity_to_nid(associativity);
> if (new_nid < 0 || !node_online(new_nid))
> new_nid = first_online_node;
>

Why is this churn useful?



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