On 04/19/17 19:37, Frank Rowand wrote: > On 04/19/17 11:45, Tyrel Datwyler wrote: >> On 04/18/2017 07:49 PM, Steven Rostedt wrote: >>> On Tue, 18 Apr 2017 18:42:32 -0700 >>> Frank Rowand <frowand.list@xxxxxxxxx> wrote: >>> >>>> And of course the other issue with using tracepoints is the extra space >>>> required to hold the tracepoint info. With the pr_debug() approach, the >>>> space usage can be easily removed for a production kernel via a config >>>> option. >>> >>> Now if you are saying you want to be able to enable debugging without >>> the tracing infrastructure I would agree. As the tracing infrastructure >>> is large. But I'm working on shrinking it more. >> >> The primary consumers of OF_DYNAMIC seem to be pseries and powernv where >> we are generally going to see the trace infrastructure enabled by >> default in production. > > Another primary consumer will be overlays for ARM expansion boards. Still > a work in progress. And dynamic configuration for the FPGA folks. > -Frank > >> >> -Tyrel >> >>> >>>> >>>> Tracepoints are wonderful technology, but not always the proper tool to >>>> use for debug info. >>> >>> But if you are going to have tracing enabled regardless, adding a few >>> more tracepoints isn't going to make the difference. >>> >>> -- Steve >>> >>>> >>>>> If Rob wants to convert printk() style data to trace data (and I can't >>>>> convince him otherwise) then I will have further comments on this specific >>>>> patch. >>>>> >> >> . >> > > . > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
