linux-kernel - [x86/MCE] 81aa021b8c: WARNING: CPU: 0 PID: 0 at arch/x86/kernel/cpu/mcheck/mce.c:716 machine_check

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Date:   Thu, 10 Nov 2016 20:36:02 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     lkp@...org, LKML <linux-kernel@...r.kernel.org>,
        X86 ML <x86@...nel.org>,
        linux-edac <linux-edac@...r.kernel.org>,
        "Luck, Tony" <tony.luck@...el.com>,
        LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        linux-edac <linux-edac@...r.kernel.org>,
        "Luck, Tony" <tony.luck@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [x86/MCE]  81aa021b8c: WARNING: CPU: 0 PID: 0 at
 arch/x86/kernel/cpu/mcheck/mce.c:716 machine_check_poll+0x66/0x21c

FYI, we noticed the following commit:

https://github.com/0day-ci/linux Borislav-Petkov/x86-MCE-Correct-TSC-timestamping-of-error-records/20161110-021431
commit 81aa021b8c6f464b68c6e6df93e64ffe2c2adda6 ("x86/MCE: Remove MCP_TIMESTAMP")

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -m 320M

caused below changes:


+-----------------------------------------------------------------+------------+------------+
|                                                                 | b2eca63145 | 81aa021b8c |
+-----------------------------------------------------------------+------------+------------+
| boot_successes                                                  | 16         | 0          |
| boot_failures                                                   | 0          | 10         |
| WARNING:at_arch/x86/kernel/cpu/mcheck/mce.c:#machine_check_poll | 0          | 10         |
+-----------------------------------------------------------------+------------+------------+



[    0.238462] Mountpoint-cache hash table entries: 1024 (order: 1, 8192 bytes)
[    0.240536] mce: CPU supports 10 MCE banks
[    0.241403] ------------[ cut here ]------------
[    0.242334] WARNING: CPU: 0 PID: 0 at arch/x86/kernel/cpu/mcheck/mce.c:716 machine_check_poll+0x66/0x21c
[    0.244554] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.0-rc4-00300-g81aa021 #64
[    0.246089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[    0.247857] Call Trace:
[    0.248341]  dump_stack+0x61/0x7e
[    0.249018]  __warn+0xb3/0xce
[    0.249594]  warn_slowpath_null+0x18/0x1a


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Kernel Test Robot

View attachment "config-4.9.0-rc4-00300-g81aa021" of type "text/plain" (117677 bytes)

View attachment "job-script" of type "text/plain" (3843 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (12956 bytes)