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authorZhenzhong Duan <zhenzhong.duan@oracle.com>2019-05-21 10:32:08 +0800
committerJonathan Corbet <corbet@lwn.net>2019-05-29 15:50:01 -0600
commit93285c01977729a2e046e065e4b99791b966130c (patch)
tree8b873501e8d87392d0a6cd6fb9f515f39bfa9054
parentfe4ec72cca500b2f97ffa0429b4cd57f67e0821d (diff)
doc: kernel-parameters.txt: fix documentation of nmi_watchdog parameter
The default behavior of hardlockup depends on the config of CONFIG_BOOTPARAM_HARDLOCKUP_PANIC. Fix the description of nmi_watchdog to make it clear. Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kees Cook <keescook@chromium.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-doc@vger.kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt5
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 138f6664b2e2..79d043b8850d 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2836,8 +2836,9 @@
0 - turn hardlockup detector in nmi_watchdog off
1 - turn hardlockup detector in nmi_watchdog on
When panic is specified, panic when an NMI watchdog
- timeout occurs (or 'nopanic' to override the opposite
- default). To disable both hard and soft lockup detectors,
+ timeout occurs (or 'nopanic' to not panic on an NMI
+ watchdog, if CONFIG_BOOTPARAM_HARDLOCKUP_PANIC is set)
+ To disable both hard and soft lockup detectors,
please see 'nowatchdog'.
This is useful when you use a panic=... timeout and
need the box quickly up again.