       printk () ,  
          
early_printk () .      printk (), 
         .
,    ,       -
     .    ,   -
  .

 ,        
   ,     printk (), -
   .

   

    printk ()  printf ()    
      (loglevel).    -
      ,     
.         ,  ,
    (console loglevel).   -
    .

printk(KERN_WARNING " !\");

printk(KERN DEBUG "  !\");

printk("    loglevel!\");

 KERN_WARNING  KERN_DEBUG     -
  <linux/kernel. h>.     , -
 "<4>"  "<7>",        
,   printk ().      -
      (  console_loglevel)
        .  . 18.1
       .

 18.1.       (loglevel)

 loglevel 

KERN_EMERG               

KERN_ALERT              ,      

KERN_CRIT                 

KERN_ERR                

KERN_WARNING            

KERN_NOTICE              ,      

KERN_INFO                

KERN_DEBUG                   

      ,     -
  DEFAULT_MESSAGE_LOGLEVEL,      KERN_
WARNING.      ,     -
    .

376                                                                    18