I just installed and uninstalled cfs-ugroup-preemptnovermagic-256. Some extremely hasty and pessimistic observations. I think I'll try other configurations later; tonight I'm going to need a working device.

- Applications may have reacted faster to mouse events.

- Applications seem to receive mouse release events when they shouldn't. As strange as it sounds, panning in Maemo Mapper is much more difficult; half of the time panning stops after a fraction of a second. I don't remember any issues like with with SSU kernel.

- When I power on, I can see Nokia splash screen gradually replaced by Hildon desktop. I've seen this before, but it's been months and months since the last time. This seems to happen every time I boot up. In related news, boot procedure (to desktop) seems to take significantly longer than before.

- During by second and third power-on sessions, ksoftirqd/0 would consume most of the CPU time. Battery life was projected to be hour hours instead of the usual seven. This may have been related to (usually harmless) JFFS warnings about JFFS internal storage space in kernel log.

- During my third session I could not run sudo gainroot; all four tries simply stopped after I pressed enter.

- Hildon UI clearly receives less CPU time. When the screen is powered after th
e device being idle, some screen elements may be missing at first. This happens nearly every single time with battely level status bar applet.

- Installer script expects to find all (currently) installed modules in kbuilds
/foo. This means that if you have additional kernels such as those in kernel-diablo-modules-extra installed, you get very uninformative warning for every and each one of those.

- WLAN/WiFi didn't work properly. I could scan available networks, but actually connecting one failed.