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authorBernhard Walle <bwalle@suse.de>2008-10-07 13:21:56 +0200
committerJonathan Corbet <corbet@lwn.net>2008-10-16 12:30:06 -0600
commit656e6c0050fd63ce42c55a6cb454a9b4b2f9ccf7 (patch)
tree08b5af8a3337c1e33333485b589ba34c90c67275 /Documentation
parent12caa1b6fc3a9772535227c723c11878b5ca618e (diff)
Document panic_on_unrecovered_nmi sysctl
This adds "panic_on_unrecovered_nmi" sysctl to Documentation/filesystems/proc.txt. The text is mainly taken from http://readlist.com/lists/vger.kernel.org/linux-kernel/43/217998.html. Signed-off-by: Bernhard Walle <bwalle@suse.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/proc.txt12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index f566ad9bcb7..d2f77d95956 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -1322,6 +1322,18 @@ debugging information is displayed on console.
NMI switch that most IA32 servers have fires unknown NMI up, for example.
If a system hangs up, try pressing the NMI switch.
+panic_on_unrecovered_nmi
+------------------------
+
+The default Linux behaviour on an NMI of either memory or unknown is to continue
+operation. For many environments such as scientific computing it is preferable
+that the box is taken out and the error dealt with than an uncorrected
+parity/ECC error get propogated.
+
+A small number of systems do generate NMI's for bizarre random reasons such as
+power management so the default is off. That sysctl works like the existing
+panic controls already in that directory.
+
nmi_watchdog
------------