Re: [OT] speeding boot process (was Re: [ANNOUNCE] hotplug-ng 001 release)

Paolo Ciarrocchi
2005-02-15T08:33:35Z

On Mon, 14 Feb 2005 18:45:20 -0500, Lee Revell <rlrevell@joe-job.com> wrote:
> On Mon, 2005-02-14 at 15:21 -0800, Roland Dreier wrote:
> > Lee> I don't see why so much effort goes into improving boot time
> > Lee> on the kernel side when the most obvious user space problem
> > Lee> is ignored.
> >
> > How much of a win is it to run init scripts in parallel? I seem to
> > recall seeing tests that show that it doesn't make much difference and
> > may even slow things down by causing more disk seeks as various things
> > start up at the same time and cause reads of different files to get
> > interleaved.
> >
>
> This is why Windows XP reserves sapce at the beginning of the disk for
> the files read during the boot process and caches copies of them there.
>
> But, I was referring more to things like GDM not being started until all
> the other init scripts are done. Why not start it first, and let the
> network initialize while the user is logging in?
>
> > On the other hand, hotplug is an area that real profiling of real
> > systems booting has identified as something that can be improved, and
> > Greg's hotplug-ng seems to be a step towards a measurable improvement.

Did anyone measure the improvement ?

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Paolo <paolo dot ciarrocchi at gmail dot com>
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