ca5824ec3b
in SSTOP state, execpt P_SYSTEM and curproc processes. We have to way to find the original state of the process so we can't restart scheduling, so this can only be used at shutdown time. XXX suspendsched() should also deal with processes running on other CPUs. I don't know how to do that, and as long as we have a kernel big lock, this shouldn't be a problem.