# 启动时的小秘密

内核启动的过程不是一蹴而就的，而且其中还包含了不少让人不太好找的小秘密。

每次我看到相关的代码，都要从头再找一遍，感觉非常费事。这次干脆就记录下来，以备后用。

## INIT\_CALL

在内核代码中经常会看到core\_initcall(), subsys\_initcall()这样xxx\_initcall()的函数。

这些函数可以理解为c++中的构造函数，只是内核对这些函数做了分类，并且在特定的地方调用他们。

[INIT\_CALLS的秘密](/kernel-exploring/00_index-1/01_init_call.md)

## 内核参数

启动时我们可以通过[内核参数](/kernel-exploring/00_index-1/02_command_line_parse.md)来调整系统行为。


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