System paging parameters no longer calculated at boot after 13097
After system boot,
schedpaging() kicks off a full scan of all memory pages until
pageout_sample_cnt >= pageout_sample_lim, in order to calibrate the speed at which memory pages can be scanned. Once this is determined, the initial paging parameters are set and
setupclock() is called again.
However, #13097 inadvertently changed this so that the parameters are not set until pageout is woken up for a real memory shortage.