On Fri, Jan 20, 2023 at 02:53:15AM +0200, Laurent Pinchart wrote: > Log categories are used to group messages in categories and control > their log level per category. As far as I know, dynamic debug doesn't > provide any such feature. One idea is you could put the category in the format string. Then you could just grep /proc/dynamic_debug/control for it and enable the printks like that. regards, dan carpenter