Aparticular multiprocessor operating system uses a separate ready list for each processor to avoid to have to solve the problem of sharing the ready list between multiple processors. of course one problem with this solution is that it might happen that one ready list is empty while there are still threads in other ready lists. thus one processor will be idle where there is work to do. suppose we try to solve this problem by moving threads from a non-empty ready list to the empty ready list. why is this not a real solution to the problem?