From: "河合英宏 / KAWAI，HIDEHIRO" <hidehiro.kawai.ez@hitachi.com>
To: "'Borislav Petkov'" <bp@alien8.de>
Cc: "'Peter Zijlstra'" <peterz@infradead.org>,
"Jonathan Corbet" <corbet@lwn.net>,
"Ingo Molnar" <mingo@kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Vivek Goyal" <vgoyal@redhat.com>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Michal Hocko" <mhocko@kernel.org>,
"Ingo Molnar" <mingo@redhat.com>,
"平松雅巳 / HIRAMATU，MASAMI" <masami.hiramatsu.pt@hitachi.com>
Subject: RE: [V4 PATCH 4/4] x86/apic: Introduce noextnmi boot option
Date: Thu, 1 Oct 2015 10:24:19 +0000 [thread overview]
Message-ID: <04EAB7311EE43145B2D3536183D1A8445499DB92@GSjpTKYDCembx31.service.hitachi.net> (raw)
In-Reply-To: <20151001084335.GA3764@pd.tnic>
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> On Thu, Oct 01, 2015 at 07:01:50AM +0000, æ²³åˆè‹±å® / KAWAI，HIDEHIRO wrote:
> > I suppose that a sever which uses this feature will equip a BMC
> > and BMC mandatorily supports hard reset command for the server.
> > If the HA clustering software detects no response from the server
> > after relatively long timeout, it might want to insert hard reset
> > to the server by IPMI over LAN.
>
> So why doesn't the capture kernel *automatically* ignore external NMIs,
> without a cmdline option?
>
> Before it starts capturing, it says: "I'm starting capturing and am
> ignoring external NMIs from now on."
But how do we check if the starting kernel is a dump capture kernel?
I think using cmdline option is the simplest way. You just have to
add "noextnmi" to KDUMP_COMMANDLINE_APPEND in /etc/sysconfig/kdump.
Regards,
Hidehiro Kawai
Hitachi, Ltd. Research & Development Group
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next prev parent reply other threads:[~2015-10-01 10:24 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-25 11:28 [V4 PATCH 0/4] Fix race issues among panic, NMI and crash_kexec Hidehiro Kawai
2015-09-25 11:28 ` [V4 PATCH 1/4] panic/x86: Fix re-entrance problem due to panic on NMI Hidehiro Kawai
2015-09-25 12:13 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-30 11:26 ` Peter Zijlstra
2015-10-01 1:02 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-25 11:28 ` [V4 PATCH 2/4] panic/x86: Allow cpus to save registers even if they are looping in NMI context Hidehiro Kawai
2015-09-30 11:50 ` Peter Zijlstra
2015-10-01 1:43 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-25 11:28 ` [V4 PATCH 3/4] kexec: Fix race between panic() and crash_kexec() called directly Hidehiro Kawai
2015-09-28 3:53 ` kbuild test robot
2015-09-28 7:08 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-30 11:53 ` Peter Zijlstra
2015-10-01 2:04 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-28 4:02 ` kbuild test robot
2015-09-28 4:46 ` 河合英宏 / KAWAI，HIDEHIRO
2015-09-25 11:28 ` [V4 PATCH 4/4] x86/apic: Introduce noextnmi boot option Hidehiro Kawai
2015-09-30 11:55 ` Peter Zijlstra
2015-10-01 2:33 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 6:27 ` Peter Zijlstra
2015-10-01 7:01 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-01 8:43 ` Borislav Petkov
2015-10-01 10:24 ` 河合英宏 / KAWAI，HIDEHIRO [this message]
2015-10-01 11:01 ` Borislav Petkov
2015-10-02 0:58 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-02 7:47 ` Borislav Petkov
2015-10-05 2:03 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-05 8:27 ` Borislav Petkov
2015-10-05 9:21 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-05 10:14 ` Borislav Petkov
2015-10-13 11:55 ` 河合英宏 / KAWAI，HIDEHIRO
[not found] ` <alpine.DEB.2.11.1510132210590.25029@nanos>
2015-10-14 13:54 ` Ingo Molnar
2015-10-16 1:58 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-13 20:22 ` Thomas Gleixner
2015-10-14 3:39 ` 河合英宏 / KAWAI，HIDEHIRO
[not found] ` <alpine.DEB.2.11.1510140924370.25029@nanos>
2015-10-16 2:02 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-27 8:46 ` Baoquan He
2015-10-27 9:01 ` 河合英宏 / KAWAI，HIDEHIRO
2015-10-27 9:06 ` 'Baoquan He'
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