linux-kernel - Re: [PATCH v6 7/8] x86/resctrl: Introduce "-o debug" mount option

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Date:   Fri, 4 Aug 2023 13:42:49 -0700
From:   Reinette Chatre <reinette.chatre@...el.com>
To:     Babu Moger <babu.moger@....com>, <corbet@....net>,
        <tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>
CC:     <fenghua.yu@...el.com>, <dave.hansen@...ux.intel.com>,
        <x86@...nel.org>, <hpa@...or.com>, <paulmck@...nel.org>,
        <akpm@...ux-foundation.org>, <quic_neeraju@...cinc.com>,
        <rdunlap@...radead.org>, <damien.lemoal@...nsource.wdc.com>,
        <songmuchun@...edance.com>, <peterz@...radead.org>,
        <jpoimboe@...nel.org>, <pbonzini@...hat.com>,
        <chang.seok.bae@...el.com>, <pawan.kumar.gupta@...ux.intel.com>,
        <jmattson@...gle.com>, <daniel.sneddon@...ux.intel.com>,
        <sandipan.das@....com>, <tony.luck@...el.com>,
        <james.morse@....com>, <linux-doc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <bagasdotme@...il.com>,
        <eranian@...gle.com>, <christophe.leroy@...roup.eu>,
        <jarkko@...nel.org>, <adrian.hunter@...el.com>,
        <quic_jiles@...cinc.com>, <peternewman@...gle.com>
Subject: Re: [PATCH v6 7/8] x86/resctrl: Introduce "-o debug" mount option

Hi Babu,

On 7/19/2023 4:22 PM, Babu Moger wrote:
> @@ -2591,6 +2599,8 @@ static int rdt_get_tree(struct fs_context *fc)
>  out_schemata_free:
>  	schemata_list_destroy();
>  out_ctx:
> +	if (ctx->enable_debug)
> +		resctrl_debug = false;
>  	if (ctx->enable_mba_mbps)
>  		set_mba_sc(false);
>  	cdp_disable_all();

These changes are a red flag to me. Developers still need to
do what patch #4 was aiming to prevent.

Reinette