linux-kernel - Re: [lkp-robot] [x86/topology] 379a4bb988: dmesg.WARNING:at_arch/x86/events/intel/uncore.c:#uncore_change_type

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Date:   Mon, 16 Oct 2017 09:50:08 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     kernel test robot <xiaolong.ye@...el.com>
Cc:     Prarit Bhargava <prarit@...hat.com>, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Piotr Luc <piotr.luc@...el.com>,
        Kan Liang <kan.liang@...el.com>, Borislav Petkov <bp@...e.de>,
        Stephane Eranian <eranian@...gle.com>,
        Arvind Yadav <arvind.yadav.cs@...il.com>,
        Andy Lutomirski <luto@...nel.org>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        He Chen <he.chen@...ux.intel.com>,
        Mathias Krause <minipli@...glemail.com>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>, lkp@...org,
        ltp@...ts.linux.it
Subject: Re: [lkp-robot] [x86/topology]  379a4bb988:
 dmesg.WARNING:at_arch/x86/events/intel/uncore.c:#uncore_change_type_ctx


* kernel test robot <xiaolong.ye@...el.com> wrote:

> 
> FYI, we noticed the following commit (built with gcc-6):
> 
> commit: 379a4bb9880608931642e1b4208380468d347b84 ("x86/topology: Avoid wasting 128k for package id array")
> url: https://github.com/0day-ci/linux/commits/Prarit-Bhargava/x86-smpboot-Cleanup-logical-package-ID/20170929-202113
> 
> 
> in testcase: ltp
> with following parameters:
> 
> 	test: cpuhotplug
> 
> test-description: The LTP testsuite contains a collection of tools for testing the Linux kernel and related features.
> test-url: http://linux-test-project.github.io/
> 
> 
> on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 64G memory
> 
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
> 
> 
> kern  :warn  : [  119.686133] ------------[ cut here ]------------
> kern  :warn  : [  119.692171] WARNING: CPU: 0 PID: 13 at arch/x86/events/intel/uncore.c:1058 uncore_change_type_ctx+0xf0/0x100

If this warning is caused by these patches then the warning should be fixed too, 
before we can apply the patches.

Thanks,

	Ingo