[RESEND PATCH 1/3] Add flag to request pages are locked after page fault

The cost of faulting in all memory to be locked can be very high when working with large mappings. If only portions of the mapping will be used this can incur a high penalty for locking. This patch introduces the ability to request that pages are not pre-faulted, but are placed on the unevictable

[PATCH 1/3] Add flag to request pages are locked after page fault

The cost of faulting in all memory to be locked can be very high when working with large mappings. If only portions of the mapping will be used this can incur a high penalty for locking. This patch introduces the ability to request that pages are not pre-faulted, but are placed on the unevictable