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console_loglevel [2018/11/23 14:34]
rpjday [Kernel source files]
console_loglevel [2018/11/23 15:33]
rpjday [Overview]
Line 1: Line 1:
 ===== Overview ===== ===== Overview =====
  
-Properties of console loglevel.+Properties of console loglevel, and how to use it.
  
 ===== Files ===== ===== Files =====
Line 27: Line 27:
   * /​sys/​module/​printk/​parameters   * /​sys/​module/​printk/​parameters
   * /​proc/​sys/​kernel/​printk/​*   * /​proc/​sys/​kernel/​printk/​*
 +
 +===== Kernel parameters =====
 +
 +<​code>​
 +loglevel= ​      All Kernel Messages with a loglevel smaller than the
 +                console loglevel will be printed to the console. It can
 +                also be changed with klogd or other programs. The
 +                loglevels are defined as follows:
 +
 +                0 (KERN_EMERG) ​         system is unusable
 +                1 (KERN_ALERT) ​         action must be taken immediately
 +                2 (KERN_CRIT) ​          ​critical conditions
 +                3 (KERN_ERR) ​           error conditions
 +                4 (KERN_WARNING) ​       warning conditions
 +                5 (KERN_NOTICE) ​        ​normal but significant condition
 +                6 (KERN_INFO) ​          ​informational
 +                7 (KERN_DEBUG) ​         debug-level messages
 +</​code>​
 +
 +<​code>​
 +ignore_loglevel [KNL]
 +                Ignore loglevel setting - this will print /all/
 +                kernel messages to the console. Useful for debugging.
 +                We also add it as printk module parameter, so users
 +                could change it dynamically,​ usually by
 +                /​sys/​module/​printk/​parameters/​ignore_loglevel.
 +</​code>​
  
 ===== Kernel source files ===== ===== Kernel source files =====
console_loglevel.txt ยท Last modified: 2018/11/23 15:33 by rpjday