On Tue, Jun 24, 2014 at 11:09 PM, lx <lxlenovostar@gmail.com> wrote:
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");
use printk or do echo "file_name +p" > /sys/kernel/debug/dyanmic_debug/control
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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