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authorOmar Sandoval <osandov@fb.com>2018-05-21 11:18:17 -0700
committerJonathan Corbet <corbet@lwn.net>2018-05-29 06:46:04 -0600
commita49d9c0ae46e149a22aefa8251d07dddd5611851 (patch)
tree178f5c501a70bd3a1fdf374391948a2f742a54ae
parentf462951e87bb1b9e5ffa95a406af38fc399d7b5a (diff)
downloadlwn-a49d9c0ae46e149a22aefa8251d07dddd5611851.tar.gz
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Documentation: document hung_task_panic kernel parameterdocs-4.18
This parameter has been around since commit e162b39a368f ("softlockup: decouple hung tasks check from softlockup detection") in 2009 but was never documented. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt11
1 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 8d24270644a1..5385af53a8ca 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1341,12 +1341,21 @@
x86-64 are 2M (when the CPU supports "pse") and 1G
(when the CPU supports the "pdpe1gb" cpuinfo flag).
+ hung_task_panic=
+ [KNL] Should the hung task detector generate panics.
+ Format: <integer>
+
+ A nonzero value instructs the kernel to panic when a
+ hung task is detected. The default value is controlled
+ by the CONFIG_BOOTPARAM_HUNG_TASK_PANIC build-time
+ option. The value selected by this boot parameter can
+ be changed later by the kernel.hung_task_panic sysctl.
+
hvc_iucv= [S390] Number of z/VM IUCV hypervisor console (HVC)
terminal devices. Valid values: 0..8
hvc_iucv_allow= [S390] Comma-separated list of z/VM user IDs.
If specified, z/VM IUCV HVC accepts connections
from listed z/VM user IDs only.
-
keep_bootcon [KNL]
Do not unregister boot console at start. This is only
useful for debugging when something happens in the window