linux-kernel - Re: [PATCH v7 03/24] x86/resctrl: Create helper for RMID allocation and mondata dir creation

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Message-ID: <5368ad70-1863-b19d-5334-0a5929851d4d@arm.com>
Date:   Wed, 13 Dec 2023 18:03:27 +0000
From:   James Morse <james.morse@....com>
To:     babu.moger@....com, x86@...nel.org, linux-kernel@...r.kernel.org
Cc:     Fenghua Yu <fenghua.yu@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        H Peter Anvin <hpa@...or.com>,
        shameerali.kolothum.thodi@...wei.com,
        D Scott Phillips OS <scott@...amperecomputing.com>,
        carl@...amperecomputing.com, lcherian@...vell.com,
        bobo.shaobowang@...wei.com, tan.shaopeng@...itsu.com,
        baolin.wang@...ux.alibaba.com, Jamie Iles <quic_jiles@...cinc.com>,
        Xin Hao <xhao@...ux.alibaba.com>, peternewman@...gle.com,
        dfustini@...libre.com, amitsinght@...vell.com,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: Re: [PATCH v7 03/24] x86/resctrl: Create helper for RMID allocation
 and mondata dir creation

Hi Babu,

On 09/11/2023 20:28, Moger, Babu wrote:
> On 10/25/23 13:03, James Morse wrote:
>> When monitoring is supported, each monitor and control group is allocated
>> an RMID. For control groups, rdtgroup_mkdir_ctrl_mon() later goes on to
>> allocate the CLOSID.
>>
>> MPAM's equivalent of RMID are not an independent number, so can't be
>> allocated until the CLOSID is known. An RMID allocation for one CLOSID
>> may fail, whereas another may succeed depending on how many monitor
>> groups a control group has.
>>
>> The RMID allocation needs to move to be after the CLOSID has been
>> allocated.
>>
>> Move the RMID allocation and mondata dir creation to a helper, this
>> makes a subsequent change easier to read.
>>
>> Tested-by: Peter Newman <peternewman@...gle.com>
>> Tested-by: Shaopeng Tan <tan.shaopeng@...itsu.com>
>> Reviewed-by: Shaopeng Tan <tan.shaopeng@...itsu.com>
>> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
>> Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>
>> Signed-off-by: James Morse <james.morse@....com>
> 
> Reviewed-by: Babu Moger <babu.moger@....com>

Thanks!


James