Re: look at this: samsung nc10 bootchart with mobil V2

[Brian Maly <bmaly redhat com>]

Christoph Höger wrote:
> Hey there, 
>
> hereby starting the next "what services are really needed" flamewar ;).
>
> No, really, have a look at that bootchart:
>
>  http://www.phoronix.com/scan.php?page=article&item=intel_moblin_2&num=2
>
> They claim that their netbook boots in 7-8s with moblin alpha. 
>
> Ok, they start xfce instead of gnome/kde but just think of booting that
> thing into gdm. This would already completely exceed the 10s startup
> feature of fedora 12.
>
> And look at what they start: udev, hal, dbus, all those things that tend
> to slow down boot are there (well, no sendmail daemon).
>
> So how can they do that?
>
>
>   
This model has a SD card. Such a card is big enough to use as you /boot 
partition (i.e. big enough to store your kernel, initrd, ramdisk etc). 
This configuration will boot much faster than off a hard drive. Embedded 
linux systems boot just as quickly if you use the same type card for 
your boot partition. You then use a ramdisk for the root fs. This is the 
model which most embedded systems that run linux use. They boot fast and 
run fast. Usually you run the root fs in ram and mount only /usr and 
/home off a real hard drive.

Brian