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

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Message-ID: <CAOJe8K1TBhJbqRck=Ayd7wgjUdRWXdHoXoHMRin=Uv5V5bpD2g@mail.gmail.com>
Date:	Tue, 29 Sep 2015 22:46:05 +0300
From:	Denis Kirjanov <kda@...ux-powerpc.org>
To:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
Cc:	Nishanth Aravamudan <nacc@...ux.vnet.ibm.com>,
	benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au,
	nikunj@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	anton@...ba.org, grant.likely@...aro.org, cl@...ux.com,
	khandual@...ux.vnet.ibm.com, linuxppc-dev@...ts.ozlabs.org,
	gkurz@...ux.vnet.ibm.com
Subject: Re: [PATCH RFC 0/5] powerpc:numa Add serial nid support

On 9/29/15, Raghavendra K T <raghavendra.kt@...ux.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@...ux.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.

Thanks!
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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