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SubjectRe: [PATCH] arm64: Kconfig: Enable NODES_SPAN_OTHER_NODES config for NUMA
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Hi Will,

On 2/6/20 2:23 AM, Will Deacon wrote:
> On Mon, Feb 03, 2020 at 11:55:14AM -0800, Hoan Tran wrote:
>> Some NUMA nodes have memory ranges that span other nodes.
>> Even though a pfn is valid and between a node's start and end pfns,
>> it may not reside on that node.
>>
>> This patch enables NODES_SPAN_OTHER_NODES config for NUMA to support
>> this type of NUMA layout.
>>
>> Signed-off-by: Hoan Tran <Hoan@os.amperecomputing.com>
>> ---
>> arch/arm64/Kconfig | 7 +++++++
>> 1 file changed, 7 insertions(+)
>>
>> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
>> index e688dfa..939d28f 100644
>> --- a/arch/arm64/Kconfig
>> +++ b/arch/arm64/Kconfig
>> @@ -959,6 +959,13 @@ config NEED_PER_CPU_EMBED_FIRST_CHUNK
>> config HOLES_IN_ZONE
>> def_bool y
>>
>> +# Some NUMA nodes have memory ranges that span other nodes.
>> +# Even though a pfn is valid and between a node's start and end pfns,
>> +# it may not reside on that node.
>> +config NODES_SPAN_OTHER_NODES
>> + def_bool y
>> + depends on ACPI_NUMA
>> +
>
> I thought we agreed to do this in the core code?
>
> https://lore.kernel.org/lkml/1562887528-5896-1-git-send-email-Hoan@os.amperecomputing.com

Yes, but it looks like Thomas didn't agree to apply this patch into x86.

https://lore.kernel.org/lkml/alpine.DEB.2.21.1907152042110.1767@nanos.tec.linutronix.de/

Regards
Hoan

>
> Will
>

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