linux-kernel - Re: [PATCH v7 7/8] x86/resctrl: Introduce "-o debug" mount option

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Message-ID: <820a0cb4-423c-ae61-79be-a134be9882bc@intel.com>
Date:   Tue, 15 Aug 2023 15:51:33 -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 v7 7/8] x86/resctrl: Introduce "-o debug" mount option

Hi Babu,

On 8/11/2023 1:10 PM, Babu Moger wrote:

...

> @@ -2833,6 +2849,8 @@ static void rdt_kill_sb(struct super_block *sb)
>  
>  	set_mba_sc(false);
>  
> +	resctrl_debug = false;
> +
>  	/*Put everything back to default values. */
>  	for_each_alloc_capable_rdt_resource(r)
>  		reset_all_ctrls(r);

This should not be necessary as rdt_disable_ctx() should already
be called here.

> @@ -3713,6 +3731,9 @@ static int rdtgroup_show_options(struct seq_file *seq, struct kernfs_root *kf)
>  	if (is_mba_sc(&rdt_resources_all[RDT_RESOURCE_MBA].r_resctrl))
>  		seq_puts(seq, ",mba_MBps");
>  
> +	if (resctrl_debug)
> +		seq_puts(seq, ",debug");
> +
>  	return 0;
>  }
>  
> 
> 

Reinette