Meanwhile, if the size of the sub LRU table 20 is 10, the size of {HEAD ~ the large memory block} is {TAIL ~ 640 KB} 
Meanwhile , if the size of the sub LRU table 20 is 10 , the size of { HEAD ~ the large memory block } is { TAIL ~ 640 KB }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL