linux-kernel - Re: [PATCH] Documentation, dt, numa: Add note to empty NUMA node

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Message-ID: <0592a04c-c526-101b-2ca2-caf4fc9e7587@redhat.com>
Date:   Fri, 25 Jun 2021 12:10:33 +1000
From:   Gavin Shan <gshan@...hat.com>
To:     Randy Dunlap <rdunlap@...radead.org>, devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        drjones@...hat.com, shan.gavin@...il.com
Subject: Re: [PATCH] Documentation, dt, numa: Add note to empty NUMA node

On 6/24/21 5:44 PM, Gavin Shan wrote:
> On 6/24/21 3:37 PM, Randy Dunlap wrote:
>> On 6/23/21 9:58 PM, Gavin Shan wrote:
>>> On 6/24/21 12:14 PM, Randy Dunlap wrote:
>>>> On 6/23/21 8:37 PM, Gavin Shan wrote:
>>>>> The empty NUMA nodes, where no memory resides in, are allowed. For
>>>>> these empty NUMA nodes, the 'len' of 'reg' property is zero. These
>>>>> empty NUMA node IDs are still valid and parsed. I finds difficulty
>>>>> to get where it's properly documented.
>>>>>
>>>>> So lets add note to empty NUMA nodes in the NUMA binding doc.
>>>>>
>>>>> Signed-off-by: Gavin Shan <gshan@...hat.com>
>>>>> ---
>>>>>    Documentation/devicetree/bindings/numa.txt | 4 ++++
>>>>>    1 file changed, 4 insertions(+)
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/numa.txt b/Documentation/devicetree/bindings/numa.txt
>>>>> index 21b35053ca5a..c564705c0eac 100644
>>>>> --- a/Documentation/devicetree/bindings/numa.txt
>>>>> +++ b/Documentation/devicetree/bindings/numa.txt
>>>>> @@ -109,6 +109,10 @@ Example:
>>>>>    Dual socket system consists of 2 boards connected through ccn bus and
>>>>>    each board having one socket/soc of 8 cpus, memory and pci bus.
>>>>>    +Note that the empty NUMA nodes, which no memory resides in, are allowed
>>>>
>>>> Missing period at end of the sentence above.
>>>>
>>>
>>> Oh, Yes. Thanks, Randy. I will replace "resides in" with "resides in period"
>>> in v2.
>>
>> Cute. Would it help if I replaced "period" with Missing "full stop" or '.' at the end
>> of the sentence?
>>
> 
> Ah, yes, '.' is needed either. Do you want me to post a new revision or you
> modify it right away? I don't know how device-tree patches get merged :)
> 

Randy, I just posted v2 to include changes suggested by you. Could
you help to have a quick check when getting a chance?

>>>>> +Their NUMA node IDs are still valid so that memory can be added into these
>>>>> +NUMA nodes through hotplug afterwards.
>>>>> +
>>>>>        memory@...000 {
>>>>>            device_type = "memory";
>>>>>            reg = <0x0 0xc00000 0x0 0x80000000>;
>>>

[...]

Thanks,
Gavin