parallel booting init in C - even larger speedup

[Olivier Sessink]

Olaf van der Spek wrote:

> Isn't an IO bottleneck 'solved' by using readahead?
> And even without readahead, generating IO requests earlier means the
> HDD may be able to serve them in a more efficient order.

but you need also more context switches, which increases the overhead.

So the maximum speedup is expected when you boot an IO-bound and a
CPU-bound process in parallel.

regards,
	Olivier