20 seconds boot requirement (was: Hello -- NAND/NOR Flash design for GTA02)

[Dodji Seketeli]

On Fri, 11 Jan 2008 13:47:36 +0100,
Michael 'Mickey' Lauer <mickey at openmoko.org> wrote :

> cc'ing to distro-devel, these guys should be involved in decision
> processes like that.
> 
> Andy Green wrote:
> > One of the choices that we may do is to cut rootfs into two,
> > because the amount of time spent mounting is proportional only to
> > the partition size.  We can create a 50MB "early boot" partition we
> > can mount to get started with the initscripts, and mount the
> > remaining 200MB in the background at a different mountpoint.  This
> > will reduce the effective initial JFFS2 mount time to 20% of what
> > it is now.
> 
> I'd really like someone to try yaffs2 instead of starting to partition
> the flash.
> 
> As for the userland speed up...
> Graeme, how far are you with upstart integration?

Do we have figures about where the time is being spent now ? I guess
before jumping into optimising things a proper measure of where time is
being spent is due.

Regards,

Dodji.

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