linux-kernel - Re: [PATCH] x86/intel_rdt: Classify /proc/cpuinfo flag bits and add missing bits in documentation

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Date:   Sun, 10 Dec 2017 17:22:53 -0800
From:   Fenghua Yu <fenghua.yu@...el.com>
To:     Brice Goglin <brice.goglin@...il.com>
Cc:     Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <h.peter.anvin@...el.com>,
        Ingo Molnar <mingo@...e.hu>, Tony Luck <tony.luck@...el.com>,
        Vikas Shivappa <vikas.shivappa@...ux.intel.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>,
        "Chatre, Reinette" <reinette.chatre@...el.com>,
        Sai Prakhya <sai.praneeth.prakhya@...el.com>,
        x86 <x86@...nel.org>, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86/intel_rdt: Classify /proc/cpuinfo flag bits and add
 missing bits in documentation

On Sat, Dec 09, 2017 at 10:58:01PM +0100, Brice Goglin wrote:
> Le 09/12/2017 à 01:25, Fenghua Yu a écrit :
> > From: Fenghua Yu <fenghua.yu@...el.com>
> >
> > With more flag bits in /proc/cpuinfo for RDT, it's better to classify the
> > bits for readability.
> >
> > Some previously missing bits are added as well.
> >
> > Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> > ---
> >  Documentation/x86/intel_rdt_ui.txt | 7 ++++++-
> >  1 file changed, 6 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/x86/intel_rdt_ui.txt b/Documentation/x86/intel_rdt_ui.txt
> > index 6851854..9b62738 100644
> > --- a/Documentation/x86/intel_rdt_ui.txt
> > +++ b/Documentation/x86/intel_rdt_ui.txt
> > @@ -7,7 +7,12 @@ Tony Luck <tony.luck@...el.com>
> >  Vikas Shivappa <vikas.shivappa@...el.com>
> >  
> >  This feature is enabled by the CONFIG_INTEL_RDT Kconfig and the
> > -X86 /proc/cpuinfo flag bits "rdt", "cqm", "cat_l3" and "cdp_l3".
> > +X86 /proc/cpuinfo flag bits:
> > +RDT (Resource Director Technology) Allocation - "rdt_a"
> > +CAT (Cache Allocation Technology) - "cat_l3", "cdp_l3", "cat_l2"
> 
> Why not "Code and Data Prioritization" for cdp_l3?

CDP is an extension of CAT. So I just put cdp_l3 into the CAT class.

Thanks.

-Fenghua