From: Stephen Kitt Date: Tue, 18 Feb 2020 12:59:21 +0000 (+0100) Subject: docs: document panic fully in sysctl/kernel.rst X-Git-Tag: io_uring-5.7-2020-04-09~47^2~61 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=404347e68aeb81b89dc440135ed23fcabff104f9;p=linux-block.git 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 Signed-off-by: Jonathan Corbet --- 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