参考文章:http://blog.csdn.net/zifehng/article/details/60763837
预定义的内核log等级
// include/linux/kern_levels.h
#define KERN_SOH "\001" /* ASCII Start Of Header */
#define KERN_SOH_ASCII '\001'
#define KERN_EMERG KERN_SOH "0" /* system is unusable */
#define KERN_ALERT KERN_SOH "1" /* action must be taken immediately */
#define KERN_CRIT KERN_SOH "2" /* critical conditions */
#define KERN_ERR KERN_SOH "3" /* error conditions */
#define KERN_WARNING KERN_SOH "4" /* warning conditions */
#define KERN_NOTICE KERN_SOH "5" /* normal but significant condition */
#define KERN_INFO KERN_SOH "6" /* informational */
#define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
#define KERN_DEFAULT KERN_SOH "d" /* the default kernel loglevel */
上面的内容都可以在code里面找到,我偷懒就直接转载了。感谢源博主。
在我们的Android wear(MSM8909W)项目中默认开机之后变为 6 6 1 7
修改的位置在init rc里面:
common-8x09/common/rootdir/etc/init.qcom.rc
# Set the console loglevel to < KERN_INFO
# Set the default message loglevel to KERN_INFO
write /proc/sys/kernel/printk "6 6 1 7"
如果开启console log,最好是echo 8 > /proc/sys/kernel/printk
MSM平台开启console log的config配置为:
CONFIG_SERIAL_MSM_HSL=y
CONFIG_SERIAL_MSM_HSL_CONSOLE=y
其他的在dts里面配置。