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I like _ONCE warnings because it's guaranteed that they don't flood the log. During testing I find it useful to reset the state of the once warnings, so that I can rerun tests and see if they trigger again, or can guarantee that a test run always hits the same warnings. This patch adds a debugfs interface to reset all the _ONCE warnings so that they appear again: echo 1 > /sys/kernel/debug/clear_warn_once This is implemented by putting all the warning booleans into a special section, and clearing it. [[email protected]: coding-style fixes] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Andi Kleen <[email protected]> Tested-by: Michael Ellerman <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
7 lines
224 B
Text
7 lines
224 B
Text
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WARN_ONCE / WARN_ON_ONCE only print a warning once.
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echo 1 > /sys/kernel/debug/clear_warn_once
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clears the state and allows the warnings to print once again.
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This can be useful after test suite runs to reproduce problems.
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