Testing new sched_ule + apic --> reverting to old stable system

Hi,

i want to test the new sources and have already cvsuped.

If i make a "make world" and after reboot there are problems, how
do i switch back to the older sources for compiling again the "now
running system" ? (I mean not only booting the kernel.old but world,
too. That is a general question)

Maybe that is the wrong mailing list for ask such things, sorry.

bye,
Andy