Hi, Aruna Thanks for your answer! I used printk like this in the previous submit. printk(KERN_ALERT "Hello World !"); I will change "KERN_ALERT" to "KERN_DEBUG" and try to submit again! also thanks for Masood Mehmood and Parinay Kondekar's help! Best Regards! wangyubin On 03/25/2014 10:16 AM, Aruna Hewapathirane wrote: > 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
