From: Hidehiro Kawai <[email protected]>
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 <[email protected]>
Requested-by: Borislav Petkov <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Baoquan He <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Don Zickus <[email protected]>
Cc: "Eric W. Biederman" <[email protected]>
Cc: Heinrich Schuchardt <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Kosina <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Manfred Spraul <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Nicolas Iooss <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Seth Jennings <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ulrich Obergfell <[email protected]>
Cc: Vivek Goyal <[email protected]>
Cc: x86-ml <[email protected]>
Link: http://lkml.kernel.org/r/20151210014637.25437.71903.stgit@softrs
Signed-off-by: Borislav Petkov <[email protected]>
---
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
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