In the linux system , kernel is often starting up like this :
bootloader -> start_32() -> start_kernel() -> init()
i would like to ask what is the piority level in this starting procedure
? 0 or 3 ? that means, this start up process are running in kernel space
or user space ? or the level is keep changing ?
If it is in kernel space from the very beginning , at which point the
system is switched into user space ? is it at the time when kernel open
the shell ?
I am new to linux, hope someone can help me here.
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