Hi Martin, On Wed, Apr 16, 2014 at 2:13 PM, Martin Kepplinger <martink@posteo.de> 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
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