linux-kernel - Re: [PATCH v10 5/8] x86/resctrl: Make mba_sc use total bandwidth if local is not supported

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Message-ID: <b3c59250-d648-4898-b632-fe7441f8bf90@intel.com>
Date: Tue, 26 Nov 2024 10:37:01 -0800
From: Reinette Chatre <reinette.chatre@...el.com>
To: Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>, "Peter
 Newman" <peternewman@...gle.com>, Jonathan Corbet <corbet@....net>,
	<x86@...nel.org>
CC: James Morse <james.morse@....com>, Jamie Iles <quic_jiles@...cinc.com>,
	Babu Moger <babu.moger@....com>, Randy Dunlap <rdunlap@...radead.org>,
	"Shaopeng Tan (Fujitsu)" <tan.shaopeng@...itsu.com>,
	<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<patches@...ts.linux.dev>
Subject: Re: [PATCH v10 5/8] x86/resctrl: Make mba_sc use total bandwidth if
 local is not supported

Hi Tony,

On 11/22/24 3:58 PM, Tony Luck wrote:
> The default input measurement to the mba_sc feedback loop for
> memory bandwidth control when the user mounts with the "mba_MBps"
> option is the local bandwidth event.
> 
> But some systems may not support a local bandwidth event.
> 
> When local bandwidth event is not supported, check for support
> of total bandwidth and use that instead.
> 
> Relax the mount option check to allow use of the "mba_MBps"
> option for systems when only total bandwidth monitoring is
> supported. Also update the error message.
> 
> Signed-off-by: Tony Luck <tony.luck@...el.com>
> ---

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

Reinette