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From:   Pingfan Liu <kernelfans@gmail.com>
Date:   Thu, 8 Aug 2019 13:41:57 +0800
Message-ID: <CAFgQCTs7XN3xBPt64jPNb4wCGAZRmYSjhPM=tgcLriVCEx+uDA@mail.gmail.com>
Subject: Re: [PATCH 0/4] x86/mce: protect nr_cpus from rebooting by broadcast mce
To:     Thomas Gleixner <tglx@linutronix.de>
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>
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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