On Thu, 26 Nov 2020 01:30:28 -0500 Paul Gortmaker <paul.gortma...@windriver.com> wrote:
> +++ b/Documentation/admin-guide/clearing-warn-once.rst > @@ -7,3 +7,12 @@ 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. > + > +Values greater than one set a timer for a periodic state reset; e.g. > + > +echo 3600 > /sys/kernel/debug/clear_warn_once I wonder if the value should be in minutes and not seconds, otherwise, a wrong value could possibly DoS the machine, if you were to write 2 into it. If there were a lot of warnings in high frequency events. Or is dumping out a bunch of warnings every 2 seconds not be a problem? Anyway, would there ever be a need to have it cleared in less than 1 minute intervals? -- Steve > + > +will establish an hourly state reset, effectively turning WARN_ONCE > +into a long period rate-limited warning.
