clearing-warn-once.rst « admin-guide « Documentation - starfive-tech/linux.git - StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

Andrey V.Kosteltsev

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Clearing WARN_ONCE
------------------

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.