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Introduce the ability to limit the limit the uptime of a kernel.
When enabled, these options set a maximum uptime on the kernel, and
(optionally) trigger a clean reboot at expiration.
This functionality may appear to be very close to the softdog watchdog
implementation. It is. But can't be the softdog for several reasons:
- The soft watchdog should be available while this functionality is active
- The duration range is different between this and the softdog. The
timeout available here is potentially quite a bit longer.
- At expiration, there are different expiration requirements and actions.
- This functionality is specific to a particular use case and should
not impact mainline functionality
To cleanly restart the kernel after one minute of uptime, the following
config items would be required:
CONFIG_UPTIME_LIMITED_KERNEL=y
CONFIG_UPTIME_LIMIT_DURATION=1
CONFIG_UPTIME_LIMIT_KERNEL_REBOOT=y
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
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Bruce Ashfield