linux-kernel - Re: [PATCH v20 00/18] Add support for Sub-NUMA cluster (SNC) systems

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Date: Fri, 14 Jun 2024 17:31:00 -0500
From: "Moger, Babu" <bmoger@....com>
To: "Luck, Tony" <tony.luck@...el.com>,
 "babu.moger@....com" <babu.moger@....com>,
 "Chatre, Reinette" <reinette.chatre@...el.com>,
 "Yu, Fenghua" <fenghua.yu@...el.com>,
 "Wieczor-Retman, Maciej" <maciej.wieczor-retman@...el.com>,
 Peter Newman <peternewman@...gle.com>, James Morse <james.morse@....com>,
 Drew Fustini <dfustini@...libre.com>, Dave Martin <Dave.Martin@....com>
Cc: "x86@...nel.org" <x86@...nel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "patches@...ts.linux.dev" <patches@...ts.linux.dev>
Subject: Re: [PATCH v20 00/18] Add support for Sub-NUMA cluster (SNC) systems



On 6/14/2024 4:40 PM, Luck, Tony wrote:
>> We have ctrl_scope, mon_scope, ctrl_domains. mon_domains.  Only one
>> resource, RDT_RESOURCE_L3 is going to use these fields. Rest of the
>> resources don't need these fields. But these fields are part of all the
>> resources.
>>
>> I am not too worried about the size of the patch.  But, I don't foresee
>> these fields will be used anytime soon in these resources(MBA. L3.
>> SMBA). Why add it now? In future we may have to cleanup all these anyways.
> 
> Babu,
> 
> I mentioned yesterday that future patches could split struct rdt_resource. I was noodling
> at doing so back in February. Patches (messy, not finished or fit for consumption) are
> here (just to give you an idea where things might build from here):
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux.git rdt_split_resource

I see, it is similar to splitting the resource (option a. v15-RFC) and 
little more. I think we should move to that direction eventually.
-- 
Babu Moger