Hello Arun Kumar,
On Sat, 28. Jun 23:03, Arun Kumar wrote:
> I am able to read my printk messages in the kernel buffer only after
> unloading the module..
> Is there some reason or configuration behind this.
>
> I used a simple kernel module with only init and exit functions, and
> after loading the module i cannot see the message printed by the
> "module_init" function in the output given by "dmesg -c" I can see them
> only after i unload the module.
>
Since you do not provide your code I have to guess that your print
statement looks like this:
pr_debug("Hello World!");
Please notice that printk doesn't flush until a trailing newline is
provided (Linux Device Drivers Chapter 4). So maybe this is what you want:
pr_debug("Hello World!\n");
> i wait for around 15-20 seconds for the init message but it only shows
> up on removing the module.
>
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With best regards
Michael Hornung
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