Re: [RFC PATCH v2 0/3] mm: mempolicy: Multi-tier weighted interleaving

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Gregory Price <gregory.price@xxxxxxxxxxxx> writes:

> On Mon, Oct 23, 2023 at 10:09:56AM +0800, Huang, Ying wrote:
>> Gregory Price <gregory.price@xxxxxxxxxxxx> writes:
>> 
>> > Depends.  if a user explicitly launches with `numactl --cpunodebind=0`
>> > then yes, you can force a task (and all its children) to run on node0.
>> 
>> IIUC, in your example, the `numactl` command line will be
>> 
>>   numactl --cpunodebind=0 --weighted-interleave=0,1,2,3
>> 
>> That is, the CPU is restricted to node 0, while memory is distributed to
>> all nodes.  This doesn't sound like reasonable for me.
>> 
>
> It being reasonable isn't really relevant. You can do this today with
> normal interleave:
>
> numactl --cpunodebind=0 --interleave=0,1,2,3
>
> The only difference between this method and that is the application of
> weights.  Doesn't seem reasonable to lock users out of doing it.

Do you have some real use case?

--
Best Regards,
Huang, Ying




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