Hi Wangyubin, The log level you require is KERN_DEBUG ... But when you run checkpatch.pl on your *.c file it will say: WARNING: Prefer netdev_dbg(netdev, ... then dev_dbg(dev, ... then pr_debug(... to printk(KERN_DEBUG ... So replacing printk(KERN_DEBUG ... with pr_debug will resolve this. You can find the log files in /var/log and you can list them with ls /var/log. The latest kernel I found has the debug and messages logs disabled by default. You can easily rectify this by editing /etc/rsyslog.d/50-default.conf. And un-commenting the section : #*.=debug;\ # auth,authpriv.none;\ # news.none;mail.none -/var/log/debug #*.=info;*.=notice;*.=warn;\ # auth,authpriv.none;\ # cron,daemon.none;\ # mail,news.none -/var/log/messages This will give you back the debug and message logs. Good luck ! Aruna On Mon, Mar 24, 2014 at 9:28 PM, wangyubin <harry198344@xxxxxxxxx> wrote: > Hello, > I have dive into the eudyptula-challenge, but when I submit my result for task 01. > I received a reply below: >> Please print to the kernel debug log level. > > I have sended module(c file), Makefile, and dmesg output for load/unload the module. > Could anyone to tell me what does this message mean? > Thanks a lot! > > -- > Best Regards! > wangyubin > > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
