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Commit d22881dc authored by Scott Wood's avatar Scott Wood Committed by Jonathan Corbet
Browse files

Documentation: Better document the hardlockup_panic sysctl 



Commit ac1f5912 ("kernel/watchdog.c: add sysctl knob
hardlockup_panic") added the hardlockup_panic sysctl, but did not add it
to Documentation/sysctl/kernel.txt.  Add this, and reference it from the
corresponding entry in Documentation/admin-guide/kernel-parameters.txt.

Signed-off-by: default avatarScott Wood <swood@redhat.com>
Acked-by: default avatarChristoph von Recklinghausen <crecklin@redhat.com>
Acked-by: default avatarDon Zickus <dzickus@redhat.com>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent aa73f28e

Documentation/admin-guide/kernel-parameters.txt

+3 −0
Original line number Diff line number Diff line
@@ -2538,6 +2538,9 @@ 
			This is useful when you use a panic=... timeout and

			need the box quickly up again.



			These settings can be accessed at runtime via

			the nmi_watchdog and hardlockup_panic sysctls.



	netpoll.carrier_timeout=

			[NET] Specifies amount of time (in seconds) that

			netpoll should wait for a carrier. By default netpoll

Documentation/sysctl/kernel.txt

+14 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ show up in /proc/sys/kernel: 
- hostname

- hotplug

- hardlockup_all_cpu_backtrace

- hardlockup_panic

- hung_task_panic

- hung_task_check_count

- hung_task_timeout_secs
@@ -313,6 +314,19 @@ will be initiated. 
1: on detection capture more debug information.

==============================================================



hardlockup_panic:



This parameter can be used to control whether the kernel panics

when a hard lockup is detected.



   0 - don't panic on hard lockup

   1 - panic on hard lockup



See Documentation/lockup-watchdogs.txt for more information.  This can

also be set using the nmi_watchdog kernel parameter.



==============================================================



hotplug:



Path for the hotplug policy agent.