[maemo-developers] [maemo-developers] OS 2007 / 770 hacker edition

[From: Frantisek Dufka]

Carlos Guerreiro wrote:

>> Did you try to leave old kernel from 2.2006 and backport changes 
>> needed (if any) from rx-34 kernel? Seems easier than using rx-34 
>> kernel directly (arch/arm/omap1/ is outdated). What newer kernel gives 
>> us?
> If I remember correctly Markku considered this at some point. Markku?

Also when thinking about it, it would be nice to be able to use IT2006 
compatible kernel and initfs. As this is hacker edition, dual booting 
between IT2006 and this one may be worthwile and can be hard with newer 
kernel. If there is no real reason to go for newer kernel I'd stay with 
the old one. Old DSP stuff probably depends on DSPGateway version in 
kernel anyway.

However I am not sure about dsme in initfs and how it interacts with 
system in rootfs over /tmp/dsmesock. If there is some binary protocol 
that changed  in IT2007 we are out of luck with keeping old initfs and 
IT2006 compatibility. Although there is this idea I'm playing with for 
some time - to copy initfs to rootfs (it is small) and let it run 
chrooted in rootfs (/boot dir seems ideal for this) instead of running 
from initfs partition and keeping /dev/mtdblock3 open (can even save 
some RAM in kernel). That way we can have two initfs systems in place 
and the only thing wee need to share is kernel. Even this could be 
solved by something like kexec or LAB [1] but this may be complex issue 
with watchdogs in kernel etc and may make booting longer.

But even with this we may still have dependecies on config partition 
format and specific version of bootloader.


Frantisek

1. http://www.handhelds.org/moin/moin.cgi/HpIpaqH2200LAB