From: Nikola Ciprich <nikola.ciprich@linuxbox.cz>
To: mingo@redhat.com
Cc: linux-smp@vger.kernel.org
Subject: [patch] nmi watchdog documentation update
Date: Mon, 03 Jul 2006 12:41:13 +0300 [thread overview]
Message-ID: <1151919673.29775.8.camel@nik-nb> (raw)
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Hello,
I've spent quite some time finding out how to use nmi watchdog to reboot
the system. This feature is not documented at all, would it be possible
to apply this patch to explain things at least a bit?
thanks a lot!
regards
Nikola Ciprich
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diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 86e9282..2973cb1 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1002,6 +1002,7 @@ running once the system is up.
entries.
nmi_watchdog= [KNL,BUGS=IA-32] Debugging features for SMP kernels
+ Read nmi_watchdog.txt
no387 [BUGS=IA-32] Tells the kernel to use the 387 maths
emulation library even if a 387 maths coprocessor
diff --git a/Documentation/nmi_watchdog.txt b/Documentation/nmi_watchdog.txt
index c025a45..4272323 100644
--- a/Documentation/nmi_watchdog.txt
+++ b/Documentation/nmi_watchdog.txt
@@ -75,6 +75,11 @@ the NMI-oopser is enabled unconditionall
On x86-64 the NMI oopser is on by default. On 64bit Intel CPUs
it uses IO-APIC by default and on AMD it uses local APIC.
+Causing kernel panic using NMI watchdog
+NMI watchdog can also cause kernel panic when lockup is detected, this is enabled
+by using nmi_watchdog=panic parameter. It can be useful in combination with
+panic=xxx kernel parameter, causing machine reboot when lockup is detected.
+
[ feel free to send bug reports, suggestions and patches to
Ingo Molnar <mingo@redhat.com> or the Linux SMP mailing
list at <linux-smp@vger.kernel.org> ]
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reply other threads:[~2006-07-03 9:41 UTC|newest]
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