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SubjectRe: [PATCH RFC] USB: Add HCD fastboot
On Wed, 6 Aug 2008, Arjan van de Ven wrote:

> On Wed, 6 Aug 2008 15:49:27 -0400 (EDT)
> Alan Stern <stern@rowland.harvard.edu> wrote:
>
> > On Wed, 6 Aug 2008, Simon Arlott wrote:
> >
> > > > Wouldn't it be much simpler, and less objectionable, to do what I
> > > > suggested earlier? That is, add a 5-second delay at the start of
> > > > hub_thread() in drivers/usb/core/hub.c. No messing with
> > > > Makefiles, no changes to the initcall scheduling.
> > >
> > > Aside from 5 seconds being too long, and anything less being a race
> > > between hub_thread() and driver initcalls, it doesn't improve
> > > anything because it'll still have to wait for the devices to finish
> > > initialising in userspace instead.
> >
> > Why is 5 seconds too long? Too long for what?
>
> because I'm done booting to full UI in that time.
>
> it's forever.

This doesn't answer my question. Why does the fact that you're already
in the UI after 5 seconds mean that 5 seconds is too long to delay the
start of khubd?

Besides, if your machine can boot to the UI in under 5 seconds then you
have no need to worry about improving boot-up speed anyway.

Alan Stern



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