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From: tip-bot for Hidehiro Kawai <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: vgoyal@redhat.com, linux-kernel@vger.kernel.org, bp@alien8.de,
	uobergfe@redhat.com, bp@suse.de, x86@kernel.org,
	rostedt@goodmis.org, hpa@zytor.com, nicolas.iooss_linux@m4x.org,
	masami.hiramatsu.pt@hitachi.com, xypron.glpk@gmx.de,
	peterz@infradead.org, cmetcalf@ezchip.com, mhocko@kernel.org,
	sjenning@redhat.com, corbet@lwn.net, manfred@colorfullife.com,
	hidehiro.kawai.ez@hitachi.com, tglx@linutronix.de,
	bhe@redhat.com, dzickus@redhat.com, ebiederm@xmission.com,
	mingo@kernel.org, jkosina@suse.cz, akpm@linux-foundation.org
Subject: [tip:x86/apic] Documentation: Document kernel.panic_on_io_nmi sysctl
Date: Sat, 19 Dec 2015 02:14:25 -0800	[thread overview]
Message-ID: <tip-9f318e3fcb1d4c48c26e8ca2ff2a459b82f36a23@git.kernel.org> (raw)
In-Reply-To: <20151210014637.25437.71903.stgit@softrs>

Commit-ID:  9f318e3fcb1d4c48c26e8ca2ff2a459b82f36a23
Gitweb:     http://git.kernel.org/tip/9f318e3fcb1d4c48c26e8ca2ff2a459b82f36a23
Author:     Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
AuthorDate: Mon, 14 Dec 2015 11:19:14 +0100
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Sat, 19 Dec 2015 11:07:01 +0100

Documentation: Document kernel.panic_on_io_nmi sysctl

kernel.panic_on_io_nmi sysctl was introduced by commit

  5211a242d0cb ("x86: Add sysctl to allow panic on IOCK NMI error")

but its documentation is missing. So, add it.

Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Requested-by: Borislav Petkov <bp@alien8.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: kexec@lists.infradead.org
Cc: linux-doc@vger.kernel.org
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/20151210014637.25437.71903.stgit@softrs
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 Documentation/sysctl/kernel.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index af70d15..73c6b1e 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -551,6 +551,21 @@ the recommended setting is 60.
 
 ==============================================================
 
+panic_on_io_nmi:
+
+Controls the kernel's behavior when a CPU receives an NMI caused by
+an IO error.
+
+0: try to continue operation (default)
+
+1: panic immediately. The IO error triggered an NMI. This indicates a
+   serious system condition which could result in IO data corruption.
+   Rather than continuing, panicking might be a better choice. Some
+   servers issue this sort of NMI when the dump button is pushed,
+   and you can use this option to take a crash dump.
+
+==============================================================
+
 panic_on_oops:
 
 Controls the kernel's behaviour when an oops or BUG is encountered.

  reply	other threads:[~2015-12-19 10:15 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-10  1:46 [V6 PATCH 0/6] Fix race issues among panic, NMI and crash_kexec Hidehiro Kawai
2015-12-10  1:46 ` [V6 PATCH 1/6] panic/x86: Fix re-entrance problem due to panic on NMI Hidehiro Kawai
2015-12-10 15:41   ` Borislav Petkov
2015-12-11  0:23     ` 河合英宏 / KAWAI,HIDEHIRO
2015-12-19 10:12   ` [tip:x86/apic] panic, x86: " tip-bot for Hidehiro Kawai
2015-12-10  1:46 ` [V6 PATCH 2/6] panic/x86: Allow CPUs to save registers even if they are looping in NMI context Hidehiro Kawai
2015-12-19 10:13   ` [tip:x86/apic] panic, x86: Allow CPUs to save registers even if " tip-bot for Hidehiro Kawai
2015-12-10  1:46 ` [V6 PATCH 3/6] kexec: Fix race between panic() and crash_kexec() called directly Hidehiro Kawai
2015-12-19 10:13   ` [tip:x86/apic] kexec: Fix race between panic() and crash_kexec() tip-bot for Hidehiro Kawai
2015-12-10  1:46 ` [V6 PATCH 4/6] x86/apic: Introduce apic_extnmi boot option Hidehiro Kawai
2015-12-19 10:13   ` [tip:x86/apic] x86/apic: Introduce apic_extnmi command line parameter tip-bot for Hidehiro Kawai
2015-12-10  1:46 ` [V6 PATCH 5/6] x86/nmi: Fix to save registers for crash dump on external NMI broadcast Hidehiro Kawai
2015-12-10  3:57   ` kbuild test robot
2015-12-10  6:36     ` 河合英宏 / KAWAI,HIDEHIRO
2015-12-10  6:52       ` [V6.1 " Hidehiro Kawai
2015-12-11 18:04         ` Borislav Petkov
2015-12-19 10:14         ` [tip:x86/apic] x86/nmi: Save regs in crash dump on external NMI tip-bot for Hidehiro Kawai
2015-12-10  1:46 ` [V6 PATCH 6/6] Documentation: Add documentation for kernel.panic_on_io_nmi sysctl Hidehiro Kawai
2015-12-19 10:14   ` tip-bot for Hidehiro Kawai [this message]
2015-12-12 11:17 ` [V6 PATCH 0/6] Fix race issues among panic, NMI and crash_kexec Borislav Petkov

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