On Tue, 2020-06-09 at 13:16 +0200, Greg Kroah-Hartman wrote: > What is wrong with the existing control of dynamic > debug messages that you want to add another type of arbitrary grouping > to it? There is no existing grouping mechanism. Many drivers and some subsystems used an internal one before dynamic debug. $ git grep "MODULE_PARM.*\bdebug\b"|wc -l 501 This is an attempt to unify those homebrew mechanisms. Stanimir attempted to add one for his driver via a driver specific standardized format substring for level. > And who defines that grouping? Individual driver authors > Will it be driver/subsystem/arch/author specific? Or kernel-wide? driver specific > This feels like it could easily get out of hand really quickly. Likely not. A question might be how useful all these old debugging printks are today and if it's reasonable to just delete them. > Why not just use tracepoints if you really want to be fine-grained? Weight and lack of class/group capability
