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Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after system panic

From Xunlei Pang <xpang@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after system panic
Date 2017-01-24 03:40 +0100
Message-ID <t2ZbB-6F4-41@gated-at.bofh.it> (permalink)
References (3 earlier) <t2Oga-7Iq-31@gated-at.bofh.it> <t2QUG-XY-11@gated-at.bofh.it> <t2R4l-11t-7@gated-at.bofh.it> <t2Re2-1kt-13@gated-at.bofh.it> <t2RnJ-1o4-35@gated-at.bofh.it>
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On 01/24/2017 at 02:14 AM, Borislav Petkov wrote:
> On Mon, Jan 23, 2017 at 10:01:53AM -0800, Luck, Tony wrote:
>> will ignore the machine check on the other cpus ... assuming
>> that "cpu_is_offline(smp_processor_id())" does the right thing
>> in the kexec case where this is an "old" cpu that isn't online
>> in the new kernel.
> Nice. And kdump did do the dumping on one CPU, AFAIR. So we should be
> good there.
>

"nr_cpus=N" will consume more memory, using very large N is almost
impossible for kdump to boot with considering the limited crash memory
reserved.

For some large machine, nr_cpus=1 might not be enough, we have to use
nr_cpus=4 or more, it is also helpful for the vmcore parallel dumping :-)

Regards,
Xunlei

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[PATCH] x86/mce: Keep quiet in case of broadcasted mce after system panic Xunlei Pang <xlpang@redhat.com> - 2017-01-23 09:10 +0100
  Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Borislav Petkov <bp@alien8.de> - 2017-01-23 14:00 +0100
    Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Xunlei Pang <xpang@redhat.com> - 2017-01-23 14:40 +0100
      Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Borislav Petkov <bp@alien8.de> - 2017-01-23 16:00 +0100
        Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic "Luck, Tony" <tony.luck@intel.com> - 2017-01-23 18:50 +0100
          Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Borislav Petkov <bp@alien8.de> - 2017-01-23 19:00 +0100
            Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic "Luck, Tony" <tony.luck@intel.com> - 2017-01-23 19:10 +0100
              Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Borislav Petkov <bp@alien8.de> - 2017-01-23 19:20 +0100
                Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Xunlei Pang <xpang@redhat.com> - 2017-01-24 03:40 +0100
            Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Xunlei Pang <xpang@redhat.com> - 2017-01-24 02:50 +0100
              Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Xunlei Pang <xpang@redhat.com> - 2017-01-24 03:00 +0100
        Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Xunlei Pang <xpang@redhat.com> - 2017-01-24 02:30 +0100
          Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Borislav Petkov <bp@alien8.de> - 2017-01-24 13:30 +0100
            Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Xunlei Pang <xpang@redhat.com> - 2017-01-26 07:30 +0100
              Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after  system panic Borislav Petkov <bp@alien8.de> - 2017-01-26 07:50 +0100

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