Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1755877AbcLZUyq (ORCPT <rfc822;w@1wt.eu>);
        Mon, 26 Dec 2016 15:54:46 -0500
Received: from userp1040.oracle.com ([156.151.31.81]:41889 "EHLO
        userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1755778AbcLZUyo (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 26 Dec 2016 15:54:44 -0500
Subject: Re: [GIT pull] smp/hotplug: Removal of notifiers
To: Thomas Gleixner <tglx@linutronix.de>
References: <alpine.DEB.2.20.1612251431340.3605@nanos>
 <20161226074530.GA297@x4> <20161226110600.GB297@x4> <20161226154502.GA287@x4>
 <53e3b52b-f353-63c8-f96f-649d754596bc@oracle.com>
 <alpine.DEB.2.20.1612261918360.3605@nanos>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Borislav Petkov <bp@alien8.de>
From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Message-ID: <1c76c271-8e04-ddb5-ab4f-c8a0fe99c23f@oracle.com>
Date: Mon, 26 Dec 2016 15:53:08 -0500
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101
 Thunderbird/45.5.1
MIME-Version: 1.0
In-Reply-To: <alpine.DEB.2.20.1612261918360.3605@nanos>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-Source-IP: aserv0022.oracle.com [141.146.126.234]
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 964
Lines: 28



On 12/26/2016 01:21 PM, Thomas Gleixner wrote:
> On Mon, 26 Dec 2016, Boris Ostrovsky wrote:
>> On 12/26/2016 10:45 AM, Markus Trippelsdorf wrote:
>>> The comment in arch/x86/kernel/cpu/mcheck/mce_amd.c says:
>>>
>>> 1384  * mcheck_init_device should be inited before threshold_init_device to
>>> 1385  * initialize mce_device, otherwise a NULL ptr dereference will cause panic.
>
> That's not changed by this commit.
>
>> My nightly test hit this as well. AMD only, Intel passed. I haven't
>> verified whether commit that Markus implicated is the one that caused
>> this but it's the same BUG signature (but possibly slightly different stack)
>>
>> [    1.554351] smpboot: CPU0: AMD Engineering Sample (family: 0x10,
>> model: 0x4, stepping: 0x1)
>> ...
>
> Is there anything interesting error message before the BUG hits? I'll try
> to reproduce on a AMD box tomorrow.


Nothing that caught my eye. I can post it tomorrow if you are still 
interested.

-boris