linux-kernel - [PATCH 6/7] Documentation: Document kernel.panic_on_io

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1450088355-27996-7-git-send-email-bp@alien8.de>
Date:	Mon, 14 Dec 2015 11:19:14 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 6/7] Documentation: Document kernel.panic_on_io_nmi sysctl

From: Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>

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@...achi.com>
Requested-by: Borislav Petkov <bp@...en8.de>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Baoquan He <bhe@...hat.com>
Cc: Chris Metcalf <cmetcalf@...hip.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: Heinrich Schuchardt <xypron.glpk@....de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Kosina <jkosina@...e.cz>
Cc: Jonathan Corbet <corbet@....net>
Cc: kexec@...ts.infradead.org
Cc: linux-doc@...r.kernel.org
Cc: Manfred Spraul <manfred@...orfullife.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Michal Hocko <mhocko@...nel.org>
Cc: Nicolas Iooss <nicolas.iooss_linux@....org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Seth Jennings <sjenning@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ulrich Obergfell <uobergfe@...hat.com>
Cc: Vivek Goyal <vgoyal@...hat.com>
Cc: x86-ml <x86@...nel.org>
Link: http://lkml.kernel.org/r/20151210014637.25437.71903.stgit@softrs
Signed-off-by: Borislav Petkov <bp@...e.de>
---
 Documentation/sysctl/kernel.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index af70d1541d3a..73c6b1ef0e84 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.
-- 
2.3.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/