linux-kernel - Re: [PATCH 0/2] x86/intel_rdt and perf/x86: Fix lack of coordination with perf

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Message-ID: <20180803104956.GU2494@hirez.programming.kicks-ass.net>
Date:   Fri, 3 Aug 2018 12:49:56 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Reinette Chatre <reinette.chatre@...el.com>
Cc:     Dave Hansen <dave.hansen@...el.com>, tglx@...utronix.de,
        mingo@...hat.com, fenghua.yu@...el.com, tony.luck@...el.com,
        vikas.shivappa@...ux.intel.com, gavin.hindman@...el.com,
        jithu.joseph@...el.com, hpa@...or.com, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] x86/intel_rdt and perf/x86: Fix lack of coordination
 with perf

On Thu, Aug 02, 2018 at 01:43:42PM -0700, Reinette Chatre wrote:

> The goal of this work is to use the existing PMU hardware coordination
> mechanism to ensure that perf and resctrl will not interfere with each
> other.

I understand what it does.. but if I'd seen you frobbing at the PMU
earlier your patches would've never gotten merged.

It's simply not going to happen.