disabling timer interrupt until (system_state >= SYSTEM_RUNNING)

[Greg KH]

On Thu, Feb 06, 2020 at 12:25:27PM -0500, William Tambe wrote:
> Since voluntary preemption is used during kernel booting, is it safe
> to disable timer interrupt until (system_state >= SYSTEM_RUNNING) ?
> 
> Wouldn't it speed up booting ?

Try it and see!

:)

Seriously, think about what needs to be done by the system during boot
time.  Hardware is initialized, threads are spawned, lots of other
things are going on.  It's not just one single process until that system
state change happens by any means.

thanks,

greg k-h