2020-04-23 19:41:06

by Stephen Kitt

Subject: [PATCH 1/3] docs: sysctl/kernel: document cad_pid

Based on the implementation in kernel/sysctl.c (the proc_do_cad_pid()
function), kernel/reboot.c, and include/linux/sched/signal.h.

Signed-off-by: Stephen Kitt <[email protected]>
---
Documentation/admin-guide/sysctl/kernel.rst | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 55b24eada13c..82bfd5892663 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -116,6 +116,16 @@ run. The statistics can be seen using ``bpftool``.
= ===================================


+cad_pid
+=======
+
+This is the pid which will be signalled on reboot (notably, by
+Ctrl-Alt-Delete). Writing a value to this file which doesn't
+correspond to a running process will result in ``-ESRCH``.
+
+See also `ctrl-alt-del`_.
+
+
cap_last_cap
============


base-commit: 7b9121040d83eb9e332f7dbc140eca17643d3586
--
2.20.1

2020-04-23 21:08:20

by Stephen Kitt

Subject: [PATCH 3/3] docs: sysctl/kernel: document firmware_config

Based on the firmware fallback mechanisms documentation and the
implementation in drivers/base/firmware_loader/fallback.c.

Signed-off-by: Stephen Kitt <[email protected]>
---
Documentation/admin-guide/sysctl/kernel.rst | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index d4bbdaf96ebc..cb6d5302b595 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -265,6 +265,19 @@ domain names are in general different. For a detailed discussion
see the ``hostname(1)`` man page.


+firmware_config
+===============
+
+See :doc:`/driver-api/firmware/fallback-mechanisms`.
+
+The entries in this directory allow the firmware loader helper
+fallback to be controlled:
+
+* ``force_sysfs_fallback``, when set to 1, forces the use of the
+ fallback;
+* ``ignore_sysfs_fallback``, when set to 1, ignores any fallback.
+
+
ftrace_dump_on_oops
===================

--
2.20.1

2020-04-28 18:41:33

by Jonathan Corbet

Subject: Re: [PATCH 1/3] docs: sysctl/kernel: document cad_pid

On Thu, 23 Apr 2020 20:36:49 +0200
Stephen Kitt <[email protected]> wrote:

> Based on the implementation in kernel/sysctl.c (the proc_do_cad_pid()
> function), kernel/reboot.c, and include/linux/sched/signal.h.
>
> Signed-off-by: Stephen Kitt <[email protected]>
> ---
> Documentation/admin-guide/sysctl/kernel.rst | 10 ++++++++++
> 1 file changed, 10 insertions(+)

Applied, thanks.

jon