linux-kernel - RE: [PATCH v4 13/18] x86/intel_rdt: Add mkdir to resctrl file system

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F3A200144@ORSMSX114.amr.corp.intel.com>
Date:   Mon, 17 Oct 2016 23:10:35 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
CC:     "Yu, Fenghua" <fenghua.yu@...el.com>,
        "Anvin, H Peter" <h.peter.anvin@...el.com>,
        Ingo Molnar <mingo@...e.hu>,
        Peter Zijlstra <peterz@...radead.org>,
        Stephane Eranian <eranian@...gle.com>,
        "Borislav Petkov" <bp@...e.de>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        Nilay Vaish <nilayvaish@...il.com>, Shaohua Li <shli@...com>,
        David Carrillo-Cisneros <davidcc@...gle.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        "Prakhya, Sai Praneeth" <sai.praneeth.prakhya@...el.com>,
        Vikas Shivappa <vikas.shivappa@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: RE: [PATCH v4 13/18] x86/intel_rdt: Add mkdir to resctrl file system

> How so? CLOSID 9 is using CLOSID 1 L2 settings. Are we just keeping the L2
> setting of CLOSID 1 around and do not reset it to default?

No. When CLOSID 9 arrives at the L2 h/w, it doesn't just take the bits it
likes an discard the high bits to map to L2_CBM[1]. It just turns into 
into the maximum allowed value for an L2 CBM.

-Tony