After loading, cache fencing is conducted to prevent {HEAD ~ the cache} from flushing {TAIL ~ the contents} or replacing the contents of any cache line 
from flushing
After loading , cache fencing is conducted to prevent { HEAD ~ the cache } from flushing { TAIL ~ the contents } or replacing the contents of any cache line
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH