linux-kernel - Re: [PATCH v6 05/21] x86/resctrl: Add domain offline callback for resctrl work

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Date:   Thu, 8 Sep 2022 18:00:44 +0100
From:   James Morse <james.morse@....com>
To:     haoxin <xhao@...ux.alibaba.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>,
        Babu Moger <Babu.Moger@....com>,
        shameerali.kolothum.thodi@...wei.com,
        D Scott Phillips OS <scott@...amperecomputing.com>,
        lcherian@...vell.com, bobo.shaobowang@...wei.com,
        tan.shaopeng@...itsu.com, Jamie Iles <quic_jiles@...cinc.com>,
        Cristian Marussi <cristian.marussi@....com>,
        xingxin.hx@...nanolis.org, baolin.wang@...ux.alibaba.com
Subject: Re: [PATCH v6 05/21] x86/resctrl: Add domain offline callback for
 resctrl work

Hi Hao Xin,

On 07/09/2022 07:29, haoxin wrote:
> 在 2022/9/2 下午11:48, James Morse 写道:
>> Because domains are exposed to user-space via resctrl, the filesystem
>> must update its state when CPU hotplug callbacks are triggered.
>>
>> Some of this work is common to any architecture that would support
>> resctrl, but the work is tied up with the architecture code to
>> free the memory.
>>
>> Move the monitor subdir removal and the cancelling of the mbm/limbo
>> works into a new resctrl_offline_domain() call. These bits are not
>> specific to the architecture. Grouping them in one function allows
>> that code to be moved to /fs/ and re-used by another architecture.

>> diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> index 030a70326ccc..5830905a92d2 100644
>> --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
>> @@ -3233,6 +3231,45 @@ static int __init rdtgroup_setup_root(void)
>>       return ret;
>>   }
>>   +static void domain_destroy_mon_state(struct rdt_domain *d)

> add inline ?

As previously, the compiler doesn't need to be told it can inline static functions in a C
file.


Thanks,

James