[mirror_ubuntu-jammy-kernel.git] / Documentation / admin-guide / clearing-warn-once.rst

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.
Commit	Line	Data
26187d18 MCC	1	Clearing WARN_ONCE
26187d18 MCC	2	------------------
b1fca27d	3
3ec25826	4	WARN_ONCE / WARN_ON_ONCE / printk_once only emit a message once.
b1fca27d AK	5
	6	echo 1 > /sys/kernel/debug/clear_warn_once
	7
	8	clears the state and allows the warnings to print once again.
	9	This can be useful after test suite runs to reproduce problems.