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| author | Stephen Kitt <steve@sk2.org> | 2020-02-18 13:59:21 +0100 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2020-02-19 03:34:37 -0700 |
| commit | 404347e68aeb81b89dc440135ed23fcabff104f9 (patch) | |
| tree | d5b344920da0d8aa97986ffa7db7cf54bec9b1f6 | |
| parent | a1ad4f15054b58636aa58f0df2961259f8781746 (diff) | |
| download | lwn-404347e68aeb81b89dc440135ed23fcabff104f9.tar.gz lwn-404347e68aeb81b89dc440135ed23fcabff104f9.zip | |
docs: document panic fully in sysctl/kernel.rst
The description of panic doesn’t cover all the supported scenarios;
this patch fixes that, describing the three possibilities (no reboot,
immediate reboot, reboot after a delay).
Based on the implementation in kernel/panic.c.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| -rw-r--r-- | Documentation/admin-guide/sysctl/kernel.rst | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 3cbbe4502e18..60c97a79ff26 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -559,9 +559,15 @@ The default is 65534. panic ===== -The value in this file represents the number of seconds the kernel -waits before rebooting on a panic. When you use the software watchdog, -the recommended setting is 60. +The value in this file determines the behaviour of the kernel on a +panic: + +* if zero, the kernel will loop forever; +* if negative, the kernel will reboot immediately; +* if positive, the kernel will reboot after the corresponding number + of seconds. + +When you use the software watchdog, the recommended setting is 60. panic_on_io_nmi |