linux-kernel - Re: [PATCH 0/4] x86/mce: protect nr_cpus from rebooting by broadcast mce

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Date:   Thu, 8 Aug 2019 13:41:57 +0800
From:   Pingfan Liu <kernelfans@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Dave Young <dyoung@...hat.com>, Andy Lutomirski <luto@...nel.org>,
        x86@...nel.org, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Masami Hiramatsu <mhiramat@...nel.org>, Qian Cai <cai@....pw>,
        Vlastimil Babka <vbabka@...e.cz>,
        Daniel Drake <drake@...lessm.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Michal Hocko <mhocko@...e.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        LKML <linux-kernel@...r.kernel.org>, Baoquan He <bhe@...hat.com>,
        kexec@...ts.infradead.org, Tony Luck <tony.luck@...el.com>,
        Xunlei Pang <xlpang@...ux.alibaba.com>
Subject: Re: [PATCH 0/4] x86/mce: protect nr_cpus from rebooting by broadcast mce

On Wed, Aug 7, 2019 at 9:07 PM Thomas Gleixner <tglx@...utronix.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