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

Denis Kirjanov kda at linux-powerpc.org
Wed Sep 30 05:46:05 AEST 2015

On 9/29/15, Raghavendra K T <raghavendra.kt at linux.vnet.ibm.com> wrote:
> On 09/28/2015 10:34 PM, Nishanth Aravamudan wrote:
>> On 28.09.2015 [13:44:42 +0300], Denis Kirjanov wrote:
>>> On 9/27/15, Raghavendra K T <raghavendra.kt at linux.vnet.ibm.com> wrote:
>>>> Problem description:
>>>> Powerpc has sparse node numbering, i.e. on a 4 node system nodes are
>>>> numbered (possibly) as 0,1,16,17. At a lower level, we map the chipid
>>>> got from device tree is naturally mapped (directly) to nid.
>>> Interesting thing to play with, I'll try to test it on my POWER7 box,
>>> but it doesn't have the OPAL layer :(
> Hi Denis,
> Thanks for your interest. I have pushed the patches to
> https://github.com/ktraghavendra/linux/tree/serialnuma_v1 if it makes
>   patches easy to grab.

One sad thing is that I can't test the actual node id mapping now
since currently I have an access to machine with only one memory node
:/ Can we fake it through qemu?

>> Note that it's also interesting to try it under PowerVM, with odd NUMA
>> topologies and report any issues found :)
> Thanks Nish, I 'll also grab a powerVM and test.

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