DEK132895 
Code introduced into V5.1A BL24 (PK6) and V5.1B BL24 (PK3) to prevent 
an aio-related application deadlock has the potential to increase 
contention for the map lock. This lock contention could severely reduce 
aio throughput. 

DSATD1ZVW 
Provide a new closef() analogue for use by aio which would not call 
VOP_LOCKCTL to release file region locks.




