From: Xunlei Pang <xpang@redhat.com>
To: Borislav Petkov <bp@alien8.de>, "Luck, Tony" <tony.luck@intel.com>
Cc: Prarit Bhargava <prarit@redhat.com>,
Kiyoshi Ueda <k-ueda@ct.jp.nec.com>,
kexec@lists.infradead.org, x86@kernel.org, xlpang@redhat.com,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Junichi Nomura <j-nomura@ce.jp.nec.com>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Dave Young <dyoung@redhat.com>
Subject: Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after system panic
Date: Tue, 24 Jan 2017 10:33:26 +0800 [thread overview]
Message-ID: <5886BCF6.9070006@redhat.com> (raw)
In-Reply-To: <20170123181437.xbjbsdjfcn7b67dh@pd.tnic>
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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kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
WARNING: multiple messages have this Message-ID (diff)
From: Xunlei Pang <xpang@redhat.com>
To: Borislav Petkov <bp@alien8.de>, "Luck, Tony" <tony.luck@intel.com>
Cc: Prarit Bhargava <prarit@redhat.com>,
Kiyoshi Ueda <k-ueda@ct.jp.nec.com>,
xlpang@redhat.com, x86@kernel.org, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Junichi Nomura <j-nomura@ce.jp.nec.com>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Dave Young <dyoung@redhat.com>
Subject: Re: [PATCH] x86/mce: Keep quiet in case of broadcasted mce after system panic
Date: Tue, 24 Jan 2017 10:33:26 +0800 [thread overview]
Message-ID: <5886BCF6.9070006@redhat.com> (raw)
In-Reply-To: <20170123181437.xbjbsdjfcn7b67dh@pd.tnic>
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
next prev parent reply other threads:[~2017-01-24 2:31 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-23 8:01 [PATCH] x86/mce: Keep quiet in case of broadcasted mce after system panic Xunlei Pang
2017-01-23 8:01 ` Xunlei Pang
2017-01-23 12:51 ` Borislav Petkov
2017-01-23 12:51 ` Borislav Petkov
2017-01-23 13:35 ` Xunlei Pang
2017-01-23 13:35 ` Xunlei Pang
2017-01-23 14:50 ` Borislav Petkov
2017-01-23 14:50 ` Borislav Petkov
2017-01-23 17:40 ` Luck, Tony
2017-01-23 17:40 ` Luck, Tony
2017-01-23 17:51 ` Borislav Petkov
2017-01-23 17:51 ` Borislav Petkov
2017-01-23 18:01 ` Luck, Tony
2017-01-23 18:01 ` Luck, Tony
2017-01-23 18:14 ` Borislav Petkov
2017-01-23 18:14 ` Borislav Petkov
2017-01-24 2:33 ` Xunlei Pang [this message]
2017-01-24 2:33 ` Xunlei Pang
2017-01-24 1:46 ` Xunlei Pang
2017-01-24 1:46 ` Xunlei Pang
2017-01-24 1:51 ` Xunlei Pang
2017-01-24 1:51 ` Xunlei Pang
2017-01-24 1:27 ` Xunlei Pang
2017-01-24 1:27 ` Xunlei Pang
2017-01-24 12:22 ` Borislav Petkov
2017-01-24 12:22 ` Borislav Petkov
2017-01-26 6:30 ` Xunlei Pang
2017-01-26 6:30 ` Xunlei Pang
2017-01-26 6:44 ` Borislav Petkov
2017-01-26 6:44 ` Borislav Petkov
2017-02-16 5:36 ` Xunlei Pang
2017-02-16 5:36 ` Xunlei Pang
2017-02-16 10:18 ` Borislav Petkov
2017-02-16 10:18 ` Borislav Petkov
2017-02-16 11:52 ` Xunlei Pang
2017-02-16 11:52 ` Xunlei Pang
2017-02-16 12:22 ` Borislav Petkov
2017-02-16 12:22 ` Borislav Petkov
2017-02-17 1:53 ` Xunlei Pang
2017-02-17 1:53 ` Xunlei Pang
2017-02-17 9:07 ` Borislav Petkov
2017-02-17 9:07 ` Borislav Petkov
2017-02-17 16:21 ` Xunlei Pang
2017-02-17 16:21 ` Xunlei Pang
2017-02-21 18:20 ` Luck, Tony
2017-02-21 18:20 ` Luck, Tony
2017-02-22 5:50 ` Xunlei Pang
2017-02-22 5:50 ` Xunlei Pang
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