How to catch early kernel log in mobilelog
时间：10-02
整理：3721RD
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[DESCRIPTION]
kernel log mobilelog
[SOLUTION]
Because of the printkbuffer size restrict, some early printk log is flushed away, so we usually can't
see early printk log in mobilelog(kernel_log.boot).
We can modify the code toincrease the buffer size to catch those early log:
alps/kernel/kernel/printk.c
#define __LOG_BUF_LEN(1 << CONFIG_LOG_BUF_SHIFT)
====> Let buffer size x 32
#define __LOG_BUF_LEN(1 << CONFIG_LOG_BUF_SHIFT << 5)
Caution: Only apply this code change in debug time！
kernel log mobilelog
[SOLUTION]
Because of the printkbuffer size restrict, some early printk log is flushed away, so we usually can't
see early printk log in mobilelog(kernel_log.boot).
We can modify the code toincrease the buffer size to catch those early log:
alps/kernel/kernel/printk.c
#define __LOG_BUF_LEN(1 << CONFIG_LOG_BUF_SHIFT)
====> Let buffer size x 32
#define __LOG_BUF_LEN(1 << CONFIG_LOG_BUF_SHIFT << 5)
Caution: Only apply this code change in debug time！