linux-kernel - Re: [GIT pull] smp/hotplug: Removal of notifiers

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Date:   Mon, 26 Dec 2016 15:53:08 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Markus Trippelsdorf <markus@...ppelsdorf.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [GIT pull] smp/hotplug: Removal of notifiers



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