On Fri, Jan 25, 2019 at 11:57:57AM -0600, Pierre-Louis Bossart wrote: > > > > > The only minor annoyance I'm experiencing now, is a large amount of debug output from something in kernel log when audio is played on the system: > > > > writing to lpe: 00000000: 01 01 01 01 00 00 08 00 ff ff ff ff 55 00 00 00 ............U... > > > > writing to lpe: 00000000: 01 01 01 01 00 00 1a 00 ff ff ff ff 75 00 12 00 ............u... > > > > ... > > > That's enabled via dynamic debug so that's rather a configuration issue > > > than a kernel problem? > > Do you have any suggestions on how to disable it? > > > > My kernel is compiled without DYNAMIC_DEBUG, DEBUG_FS and other debug features, so I don't understand why all this debug output is flooding the kernel log. > > > > It's a minor issue, but it would be nice to get rid of it. > I can confirm that this happens without DYNAMIC_DEBUG, and somehow changing > the log level doesn't seem to matter. I tried changing the console log as a > kernel parameter or with playing /proc/sys/kernel/printk, no luck. weird. Are you sure you did a clean build? The logic behind print_hex_dump_bytes() is following: - if !CONFIG_PRINTK — nothing should be printed at all - otherwise if CONFIG_DYNAMIC_DEBUG — it goes thru its facilities - else if goes to KERN_DEBUG level and thus loglevel should affect this either thru command line or via procfs If none of the above works like it should, the couple of possibilities I can see: - unclean build where previously it was compiled somehow with DEBUG - ignore_loglevel is in the kernel command line -- With Best Regards, Andy Shevchenko
