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Date:   Thu, 8 Aug 2019 08:51:04 +0200 (CEST)
From:   Thomas Gleixner <tglx@linutronix.de>
To:     Pingfan Liu <kernelfans@gmail.com>
cc:     Dave Young <dyoung@redhat.com>, Andy Lutomirski <luto@kernel.org>,
        x86@kernel.org, Ingo Molnar <mingo@redhat.com>,
        Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Masami Hiramatsu <mhiramat@kernel.org>, Qian Cai <cai@lca.pw>,
        Vlastimil Babka <vbabka@suse.cz>,
        Daniel Drake <drake@endlessm.com>,
        Jacob Pan <jacob.jun.pan@linux.intel.com>,
        Michal Hocko <mhocko@suse.com>,
        Eric Biederman <ebiederm@xmission.com>,
        LKML <linux-kernel@vger.kernel.org>, Baoquan He <bhe@redhat.com>,
        kexec@lists.infradead.org, Tony Luck <tony.luck@intel.com>,
        Xunlei Pang <xlpang@linux.alibaba.com>
Subject: Re: [PATCH 0/4] x86/mce: protect nr_cpus from rebooting by broadcast
 mce
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References: <1564995539-29609-1-git-send-email-kernelfans@gmail.com> <20190807025843.GA4776@dhcp-128-65.nay.redhat.com> <20190807075226.GA10392@mypc> <alpine.DEB.2.21.1908071504310.24014@nanos.tec.linutronix.de>
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On Thu, 8 Aug 2019, Pingfan Liu wrote:
> On Wed, Aug 7, 2019 at 9:07 PM Thomas Gleixner <tglx@linutronix.de> wrote:
> >
> [...]
> > > > >
> > > > > *** Back ground ***
> > > > >
> > > > > On x86 it's required to have all logical CPUs set CR4.MCE=1. Otherwise, a
> > > > > broadcast MCE observing CR4.MCE=0b on any core will shutdown the machine.
> >
> > Pingfan, please trim your replies and remove the useless gunk after your answer.
> OK. I will.
> 
> Thanks,
>     Pingfan
> >
> > Thanks,
> >
> >         tglx
> 

First attempt to do so failed :)