I've got the attached call trace ( __might_sleep ) early on boot.

Rebooting the PC I've got an oops after umount (EIP: driverfs-removefile)
anyway the filesystem status seem to be properly cleaned.

Another minimal noise is the lack of the vesa linux-logo vga=0x305
and the KDE sysmonitor breakage ;)

I'm using a vanilla RH 7.3 with the attached kernel config

ciao,
luca