linux-kernel - Re: [PATCH v16 25/32] x86/resctrl: Handle number of RMIDs supported by RDT_RESOURCE_PERF

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Message-ID: <d8fccc3a-18c6-41b5-8d54-d3c42eb78216@intel.com>
Date: Tue, 16 Dec 2025 13:46:41 -0800
From: Reinette Chatre <reinette.chatre@...el.com>
To: Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghuay@...dia.com>, "Maciej
 Wieczor-Retman" <maciej.wieczor-retman@...el.com>, Peter Newman
	<peternewman@...gle.com>, James Morse <james.morse@....com>, Babu Moger
	<babu.moger@....com>, Drew Fustini <dfustini@...libre.com>, Dave Martin
	<Dave.Martin@....com>, Chen Yu <yu.c.chen@...el.com>
CC: <x86@...nel.org>, <linux-kernel@...r.kernel.org>,
	<patches@...ts.linux.dev>
Subject: Re: [PATCH v16 25/32] x86/resctrl: Handle number of RMIDs supported
 by RDT_RESOURCE_PERF_PKG

Hi Tony,

On 12/10/25 3:14 PM, Tony Luck wrote:

...

> @@ -202,6 +210,24 @@ static bool group_has_usable_regions(struct event_group *e, struct pmt_feature_g
>  	return usable_regions;
>  }
>  
> +static bool all_regions_have_sufficient_rmid(struct event_group *e, struct pmt_feature_group *p)
> +{
> +	struct telemetry_region *tr;
> +	bool ret = true;
> +
> +	for (int i = 0; i < p->count; i++) {
> +		if (!p->regions[i].addr)
> +			continue;
> +		tr = &p->regions[i];
> +		if (tr->num_rmids < e->num_rmid) {
> +			e->force_off = true;
> +			return false;
> +		}
> +	}
> +
> +	return ret;

Just "return true" here?

| Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>

Reinette