Android kernel printk打印级别

1.宏定义

#define KERN_EMERG        "<0>" /* system is unusable */
#define KERN_ALERT         "<1>" /* action must be taken immediately */
#define KERN_CRIT            "<2>" /* critical conditions */
#define KERN_ERR             "<3>" /* error conditions */
#define KERN_WARNING   "<4>" /* warning conditions */
#define KERN_NOTICE       "<5>" /* normal but significant condition */
#define KERN_INFO            "<6>" /* informational */
#define KERN_DEBUG       "<7>" /* debug-level messages */

2.查看打印级别

adb shell cat /proc/sys/kernel/printk

4 4 1 7
第一个“4”表示内核打印函数printk的打印级别，只有级别比他高的信息才能在控制台上打印出来，既 0-3级别的信息。