January 2018
Intermediate to advanced
456 pages
12h 49m
English
Content preview from Embedded Linux Development Using Yocto Project Cookbook - Second Edition
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How it works...
The available log levels in printk are presented in the following table:
|
Type |
Symbol |
Description |
|
Emergency |
KERN_EMERG |
System is unstable and about to crash |
|
Alert |
KERN_ALERT |
Immediate action is needed |
|
Critical |
KERN_CRIT |
Critical software or hardware failure |
|
Error |
KERN_ERR |
Error condition |
|
Warning |
KERN_WARNING |
Nothing serious, but might indicate a problem |
|
Notice |
KERN_NOTICE |
Nothing serious, but user should take note |
|
Information |
KERN_INFO |
System information |
|
Debug |
KERN_DEBUG |
Debug messages |
If no log level is specified, the default log message as configured in the kernel configuration is used. By default, this is KERN_WARNING.
All printk statements go ...
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