Re: [RFC] kernel facilities for cache prefetching
From: Denis Vlasenko
Date: Sat May 06 2006 - 02:50:25 EST
On Tuesday 02 May 2006 11:53, Wu Fengguang wrote:
> On Tue, May 02, 2006 at 10:30:17AM +0200, Arjan van de Ven wrote:
> > one interesting thing that came out of the fedora readahead work is that
> > most of the bootup isn't actually IO bound. My test machine for example
> > can load all the data into ram in about 10 seconds, so that the rest of
> > the boot is basically IO-less. But that still takes 2 minutes....
> > So I'm not entirely sure how much you can win by just attacking this.
> Yes, I find it hard to improve the boot time of the init.d stage.
Then _get rid of your init.d_.
SysV init sequence is insane.
I use daemontools-based setup and it starts up to login prompt
in 5-10 secs (counting from the root fs mount).
In my setup, after a few simple startup scripts a svscan process
is called, which starts all services in parallel.
Gettys are services, and start right away.
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