Hi Martin, On Wed, Apr 16, 2014 at 2:13 PM, Martin Kepplinger <martink@xxxxxxxxx> wrote: > I'm on Debian here and I don't really get pr_debug and printk(KERN_DEBUG > ...). Let's stick to pr_debug. > > I have DYNAMIC_DEBUG enabled and > root@laptop:/proc/sys/kernel# cat /proc/sys/kernel/printk > 7 7 1 7 This shows the console log level. This file controls the traffic to console. But all the log messages will be present in logbuf. > > I write a module with pr_debug's. I load the module and I *don't* see > anything in /var/log/messages (or anywhere in /var/log/* ). Adding > #define DEBUG doesn't help. > > /sys/kernel/debug/dynamic_debug/control has the pr_debug entries I use > in my loaded module. > > In short: How do I see debug log messages? Using pr_info() works as > expected. What am I missing? Do I need to edit my Makefile? Did you enable dynamic printing for your file? Below command enables dynamic printing for file sdhci.c. echo 'file sdhci.c +p' > /sys/kernel/debug/dynamic_debug/control Thanks, Arun > > thanks! > martin > > -- > Martin Kepplinger > e-mail martink AT posteo DOT at > chat (XMPP) martink AT jabber DOT at > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
