hi all:
       I'm confused with pr_debug. My codes is:

###########################################

#include <linux/module.h>

#include <linux/kernel.h>

static int __init init_page_dir(void)

{

    pr_debug("Hello world\n");

    return 0;

}

static void __exit exit_page_dir(void)

{

    pr_debug("\nGoodbye now...\n\n");

}

MODULE_LICENSE("GPL");

module_init(init_page_dir);

module_exit(exit_page_dir);

###########################################

I make it, and insmod it. But the messages of "Hello world" don't show.

So, My question is If i want to fix it , I should set the DEFAULT_MESSAGE_LOGLEVEL and 

rebuild the kernel ?

My kernel version is:2.6.18

OS is: centOS

Thank you.

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