Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1751773AbdHCSEW (ORCPT <rfc822;w@1wt.eu>);
        Thu, 3 Aug 2017 14:04:22 -0400
Received: from mail-it0-f68.google.com ([209.85.214.68]:33456 "EHLO
        mail-it0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1751208AbdHCSEU (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Thu, 3 Aug 2017 14:04:20 -0400
From: Vince Weaver <vincent.weaver@maine.edu>
X-Google-Original-From: Vince Weaver <vince@maine.edu>
Date: Thu, 3 Aug 2017 14:04:17 -0400 (EDT)
X-X-Sender: vince@macbook-air
To: Peter Zijlstra <peterz@infradead.org>
cc: linux-kernel@vger.kernel.org, Andy Lutomirski <luto@kernel.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Stephane Eranian <eranian@gmail.com>
Subject: Re: perf: bug in rdpmc/mmap accounting after exec
In-Reply-To: <20170802173930.cstykcqefmqt7jau@hirez.programming.kicks-ass.net>
Message-ID: <alpine.DEB.2.20.1708031402320.26654@macbook-air>
References: <alpine.DEB.2.20.1707261530320.3810@macbook-air> <20170802173930.cstykcqefmqt7jau@hirez.programming.kicks-ass.net>
User-Agent: Alpine 2.20 (DEB 67 2015-01-07)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 407
Lines: 17

On Wed, 2 Aug 2017, Peter Zijlstra wrote:

> On Wed, Jul 26, 2017 at 03:39:01PM -0400, Vince Weaver wrote:
> > In fact, current->mm->context.perf_rdpmc_allowed goes negative which seems
> > like it shouldn't happen?

>
> Good find that...
> 
> The below seems to fix that for me.

yes, I can confirm that with this patch all of the various PAPI and 
perf_event_tests pass on my test system.

Thanks,

Vince