linux-kernel - Re: [PATCH 22/25] x86/mcheck: Do the init in one place

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Date:   Thu, 10 Nov 2016 11:27:41 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     "Luck, Tony" <tony.luck@...el.com>, Borislav Petkov <bp@...en8.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "rt@...utronix.de" <rt@...utronix.de>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>
Subject: Re: [PATCH 22/25] x86/mcheck: Do the init in one place

On 2016-11-10 11:22:22 [+0100], Thomas Gleixner wrote:
> 
> Why on earth do we enable MCE stuff in identify_cpu() ?
so it happens asap.

Boris' mail in this thread:
|Uh, hm, I'm not sure about this: so the issue I see with this is that
|the more we're delaying the enabling or MCE reporting - and especially
|setting CR4[MCE] - the more we're increasing the window where a MCE
|during early boot will cause a shutdown. (This is what happens if
|CR4[MCE]=0b).

> Thanks,
> 
> 	tglx

Sebastian