linux-kernel - Re: [PATCH v9 10/13] x86/resctrl: Add sysfs interface to write mbm_total_bytes

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Message-ID: <e9964a9e-92df-e8a3-427d-18f713ae8637@amd.com>
Date:   Tue, 20 Dec 2022 12:00:59 -0600
From:   "Moger, Babu" <babu.moger@....com>
To:     Reinette Chatre <reinette.chatre@...el.com>,
        "corbet@....net" <corbet@....net>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
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Subject: Re: [PATCH v9 10/13] x86/resctrl: Add sysfs interface to write
 mbm_total_bytes_config

Hi Reinette,

On 12/20/22 11:32, Reinette Chatre wrote:
> Hi Babu,
>
> On 12/19/2022 11:50 AM, Moger, Babu wrote:
>> Forgot about this.  This snippet is going to change. I have tested and works fine.
>> How about this?
>>
>>         /*
>>          * Update MSR_IA32_EVT_CFG_BASE MSR on one of the CPUs in the
>>          * domain. The MSRs offset from MSR MSR_IA32_EVT_CFG_BASE
>>          * are scoped at the domain level. Writing any of these MSRs
>>          * on one CPU is supposed to be observed by all CPUs in the domain.
>>          */
>>         smp_call_function_any(&d->cpu_mask, mon_event_config_write, &mon_info, 1);
>>
>>
> It looks good but please drop the "supposed to be". If there is any uncertainty
> then the data should be written to all CPUs, if not then that uncertain text should
> be dropped.

There is no uncertainty. I will drop "supposed to be".

Thanks

Babu