Re: How does Linux shutdown?'

[Nathan Poznick <poznick@conwaycorp.net>]

Thus spake Chun Kit Edwin Lau:
> Hi everyone,
> 
> 	I am curious about how Linux does the shutdown.  The kernel send
> the TERM signal to all processes when the shutdown is initiated.  But
> does the kernel wait for the every process to finish before the kernel
> halt?  If not, will there be data lost then?

The various system init scripts are called in the proper order.  After
that, init sends a TERM signal to all processes.  After a short delay,
init sends a KILL signal to all remaining processes.  Once everything
in userspace is dead, it unmounts the filesystems and reboots the
machine. 

-- 
Nathan Poznick <poznick@conwaycorp.net>

It is better to be beautiful than to be good. But it is better to be
good than to be ugly.