linux-kernel - Re: [PATCH v8 09/25] x86/resctrl: Add __init attribute to dom_data

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Message-ID: <72a320c8-13c1-4472-95fd-26eef279ad9b@amd.com>
Date: Wed, 16 Oct 2024 15:18:30 -0500
From: "Moger, Babu" <babu.moger@....com>
To: Reinette Chatre <reinette.chatre@...el.com>, corbet@....net,
 fenghua.yu@...el.com, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
 dave.hansen@...ux.intel.com
Cc: x86@...nel.org, hpa@...or.com, paulmck@...nel.org, rdunlap@...radead.org,
 tj@...nel.org, peterz@...radead.org, yanjiewtw@...il.com,
 kim.phillips@....com, lukas.bulwahn@...il.com, seanjc@...gle.com,
 jmattson@...gle.com, leitao@...ian.org, jpoimboe@...nel.org,
 kirill.shutemov@...ux.intel.com, jithu.joseph@...el.com,
 kai.huang@...el.com, kan.liang@...ux.intel.com,
 daniel.sneddon@...ux.intel.com, pbonzini@...hat.com, sandipan.das@....com,
 ilpo.jarvinen@...ux.intel.com, peternewman@...gle.com,
 maciej.wieczor-retman@...el.com, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org, eranian@...gle.com, james.morse@....com
Subject: Re: [PATCH v8 09/25] x86/resctrl: Add __init attribute to
 dom_data_init()

Hi Reinette,

On 10/16/24 13:55, Reinette Chatre wrote:
> Hi Babu,
> 
> On 10/16/24 10:32 AM, Moger, Babu wrote:
>>
>>
>> On 10/15/24 22:13, Reinette Chatre wrote:
>>> Hi Babu,
>>>
>>> On 10/9/24 10:39 AM, Babu Moger wrote:
>>>> dom_data_init() is only called during the __init sequence.
>>>> Add __init attribute like the rest of call sequence.
>>>>
>>>> While at it, pass 'struct rdt_resource' to dom_data_init() and
>>>> dom_data_exit() which will be used for mbm counter __init and__exit
>>>> call sequence.
>>>
>>> This patch needs to be split. Please move fixes to beginning of series and
>>> move the addition of the parameter to the patch where it is first used/needed.
>>
>> Sure. Will move the fixes to the beginning.
>>
>>>
>>>>
>>>> Fixes: bd334c86b5d7 ("x86/resctrl: Add __init attribute to rdt_get_mon_l3_config()")
>>>
>>> For this change I think the following Fixes tag would be more accurate:
>>> Fixes: 6a445edce657 ("x86/intel_rdt/cqm: Add RDT monitoring initialization")
>>>
>>> I think for a complete fix of the above commit it also needs to add __init
>>> storage class to l3_mon_evt_init().
>>
>> Yes. Sure.
>>
>>>
>>> The __init storage class is also missing from rdt_get_mon_l3_config() ...
>>
>> 1 internal.h _int rdt_get_mon_l3_config(struct rdt_resource *r);
>> 2 monitor.c  int __init rdt_get_mon_l3_config(struct rdt_resource *r)
>>
>> rdt_get_mon_l3_config() has __init attribute already. But prototype in
>> internal.h does not add the '__init'. Looks like that is ok.
> 
> I also think it may technically be ok since as far as I understand attributes
> the attributes will be merged. Even so, doing so does not match the current
> style where the storage class of declaration and definition are the same. See
> for example the partner function rdt_put_mon_l3_config().

Sure.

> 
>>
>>
>>> fixing that would indeed need the Fixes tag below:
>>> Fixes: bd334c86b5d7 ("x86/resctrl: Add __init attribute to rdt_get_mon_l3_config()"
>>
>> How about addressing both dom_data_init() and l3_mon_evt_init() in a
>> single patch and adding 2 fixes flags?
> 
> ... and add __init to declaration of rdt_get_mon_l3_config() ?

Sure. Will do.

> 
>>
>> Fixes: 6a445edce657 ("x86/intel_rdt/cqm: Add RDT monitoring initialization")
>> Fixes: bd334c86b5d7 ("x86/resctrl: Add __init attribute to
>> rdt_get_mon_l3_config()")
> 
> Reinette
> 

-- 
Thanks
Babu Moger