Documentation / admin-guide / clearing-warn-once.rst


Based on kernel version 5.8. Page generated on 2020-08-08 17:40 EST.

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Clearing WARN_ONCE
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WARN_ONCE / WARN_ON_ONCE / printk_once only emit a message once.

echo 1 > /sys/kernel/debug/clear_warn_once

clears the state and allows the warnings to print once again.
This can be useful after test suite runs to reproduce problems.