Commit 9c44bc03fff4 ("softlockup: allow panic on lockup") added the
softlockup_panic sysctl, but didn't add information about it to the file
Documentation/admin-guide/sysctl/kernel.rst (which in that time certainly
wasn't rst and had other name!).
This patch just adds the respective documentation and references it from
the corresponding entry in Documentation/admin-guide/kernel-parameters.txt.
This patch was strongly based on Scott Wood's commit d22881dc13b6
("Documentation: Better document the hardlockup_panic sysctl").
Reviewed-by: Kees Cook <[email protected]>
Signed-off-by: Guilherme G. Piccoli <[email protected]>
---
Documentation/admin-guide/kernel-parameters.txt | 8 ++++----
Documentation/admin-guide/sysctl/kernel.rst | 14 ++++++++++++++
2 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 04615690e69e..b24fb0d11955 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4578,10 +4578,10 @@
Format: <integer>
A nonzero value instructs the soft-lockup detector
- to panic the machine when a soft-lockup occurs. This
- is also controlled by CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC
- which is the respective build-time switch to that
- functionality.
+ to panic the machine when a soft-lockup occurs. It is
+ also controlled by the kernel.softlockup_panic sysctl
+ and CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC, which is the
+ respective build-time switch to that functionality.
softlockup_all_cpu_backtrace=
[KNL] Should the soft-lockup detector generate
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 1c48ab4bfe30..335696d3360d 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -1036,6 +1036,20 @@ NMI.
= ============================================
+softlockup_panic
+=================
+
+This parameter can be used to control whether the kernel panics
+when a soft lockup is detected.
+
+= ============================================
+0 Don't panic on soft lockup.
+1 Panic on soft lockup.
+= ============================================
+
+This can also be set using the softlockup_panic kernel parameter.
+
+
soft_watchdog
=============
--
2.25.1
On Tue, 10 Mar 2020 15:36:49 -0300
"Guilherme G. Piccoli" <[email protected]> wrote:
> Commit 9c44bc03fff4 ("softlockup: allow panic on lockup") added the
> softlockup_panic sysctl, but didn't add information about it to the file
> Documentation/admin-guide/sysctl/kernel.rst (which in that time certainly
> wasn't rst and had other name!).
>
> This patch just adds the respective documentation and references it from
> the corresponding entry in Documentation/admin-guide/kernel-parameters.txt.
>
> This patch was strongly based on Scott Wood's commit d22881dc13b6
> ("Documentation: Better document the hardlockup_panic sysctl").
>
> Reviewed-by: Kees Cook <[email protected]>
> Signed-off-by: Guilherme G. Piccoli <[email protected]>
Applied, thanks.
jon