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Re: [PATCH RFC 0/5] powerpc:numa Add serial nid support

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On 09/28/2015 11:04 PM, Nishanth Aravamudan wrote:
> On 27.09.2015 [23:59:08 +0530], Raghavendra K T wrote:
[...]
>>
>> 2) Map the sparse chipid got from device tree to a serial nid at kernel
>> level (The idea proposed in this series).
>> Pro: It is more natural to handle at kernel level than at lower (OPAL) layer.
>> con: The chipid is in device tree no longer the same as nid in kernel
>
> Is there any debugging/logging? Looks like not -- so how does a sysadmin
> map from firmware-provided values to the Linux values? That's going to
> make debugging of large systems (PowerVM or otherwise) less than
> pleasant, it seems? Possibly you could put something in sysfs?

I see 2 things could be done here:

1) while doing dump_numa_cpu_topology() we can dump nid_to_chipid()
as additional information.

2) sysfs->
Does /sys/devices/system/node/nodeX/*chipid* looks good. May be we
should add only for powerpc or otherwise we need to have chipid = nid
populated for other archs. [ I think this change may be done slowly ]





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[PATCH RFC  0/5] powerpc:numa Add serial nid support Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> - 2015-09-27 20:30 +0200
  [PATCH RFC  5/5] powerpc:numa Use chipid to nid mapping to get serial numa node ids Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> - 2015-09-27 20:30 +0200
  [PATCH RFC  4/5] powerpc:numa Add helper functions to maintain chipid to nid mapping Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> - 2015-09-27 20:30 +0200
    Re: [PATCH RFC  4/5] powerpc:numa Add helper functions to maintain  chipid to nid mapping Nishanth Aravamudan <nacc@linux.vnet.ibm.com> - 2015-09-28 19:40 +0200
      Re: [PATCH RFC  4/5] powerpc:numa Add helper functions to maintain  chipid to nid mapping Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> - 2015-09-29 21:10 +0200
  Re: [PATCH RFC 0/5] powerpc:numa Add serial nid support Denis Kirjanov <kda@linux-powerpc.org> - 2015-09-28 13:00 +0200
    Re: [PATCH RFC 0/5] powerpc:numa Add serial nid support Nishanth Aravamudan <nacc@linux.vnet.ibm.com> - 2015-09-28 19:10 +0200
      Re: [PATCH RFC 0/5] powerpc:numa Add serial nid support Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> - 2015-09-29 20:20 +0200
        Re: [PATCH RFC 0/5] powerpc:numa Add serial nid support Denis Kirjanov <kda@linux-powerpc.org> - 2015-09-29 21:50 +0200
          Re: [PATCH RFC 0/5] powerpc:numa Add serial nid support Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> - 2015-09-30 08:20 +0200
  Re: [PATCH RFC  0/5] powerpc:numa Add serial nid support Nishanth Aravamudan <nacc@linux.vnet.ibm.com> - 2015-09-28 19:40 +0200
    Re: [PATCH RFC  0/5] powerpc:numa Add serial nid support Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> - 2015-09-29 21:20 +0200

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