linux-kernel - Re: [PATCH v9 08/10] fs/resctrl: Modify rdt_parse

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Message-ID: <298f769b-b893-4ed8-90b1-d9d9dce25037@intel.com>
Date: Wed, 17 Sep 2025 22:44:23 -0700
From: Reinette Chatre <reinette.chatre@...el.com>
To: Babu Moger <babu.moger@....com>, <corbet@....net>, <tony.luck@...el.com>,
	<Dave.Martin@....com>, <james.morse@....com>, <tglx@...utronix.de>,
	<mingo@...hat.com>, <bp@...en8.de>, <dave.hansen@...ux.intel.com>
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	<rick.p.edgecombe@...el.com>, <akpm@...ux-foundation.org>,
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Subject: Re: [PATCH v9 08/10] fs/resctrl: Modify rdt_parse_data to pass mode
 and CLOSID

Hi Babu,

nit:
Subject: fs/resctrl: Modify struct rdt_parse_data to pass mode and CLOSID

On 9/2/25 3:41 PM, Babu Moger wrote:
> parse_cbm() require resource group mode and CLOSID to validate the Capacity
> Bit Mask (CBM). It is passed via struct rdtgroup in struct rdt_parse_data.
> 
> The io_alloc feature also uses CBMs to indicate which portions of cache are
> allocated for I/O traffic. The CBMs are provided by user space and need to
> be validated the same as CBMs provided for general (CPU) cache allocation.
> parse_cbm() cannot be used as-is since io_alloc does not have rdtgroup
> context.
> 
> Pass the resource group mode and CLOSID directly to parse_cbm() via struct
> rdt_parse_data, instead of through the rdtgroup struct, to facilitate
> calling parse_cbm() to verify the CBM of the io_alloc feature.
> 
> Signed-off-by: Babu Moger <babu.moger@....com>
> ---

With Subject change:

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

Reinette