From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1752147AbcKGUM3 (ORCPT <rfc822;w@1wt.eu>);
        Mon, 7 Nov 2016 15:12:29 -0500
Received: from mail.skyhub.de ([78.46.96.112]:56206 "EHLO mail.skyhub.de"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1750905AbcKGUM1 (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 7 Nov 2016 15:12:27 -0500
Date: Mon, 7 Nov 2016 21:12:24 +0100
From: Borislav Petkov <bp@alien8.de>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        linux-kernel@vger.kernel.org, rt@linutronix.de,
        linux-edac@vger.kernel.org, x86@kernel.org,
        Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 22/25] x86/mcheck: Do the init in one place
Message-ID: <20161107201224.7xazmhgm7bogkrw5@pd.tnic>
References: <20161103145021.28528-1-bigeasy@linutronix.de>
 <20161103145021.28528-23-bigeasy@linutronix.de>
 <20161107184532.xj6wzdjlzwhshcmf@pd.tnic>
 <20161107185524.GA2536@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <20161107185524.GA2536@intel.com>
User-Agent: NeoMutt/20161014 (1.7.1)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, Nov 07, 2016 at 10:55:24AM -0800, Luck, Tony wrote:
> I don't think that helps as much as you'd like it to help (at
> least on Intel). A broadcast machine check that finds the boot
> CPU has set CR4[MCE]=1 is still going to end up in reset if any
> other CPU still has CR4[MCE]=0

By leaving/moving the setting of CR4 earlier on all cores, we'll
at least make the possible window for such potential resets a lot
smaller...

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.