[PATCH V4 5/6] mm: mmap: Add mmap flag to request VM_LOCKONFAULT

Kirill A. Shutemov kirill at shutemov.name
Wed Jul 22 21:25:58 AEST 2015

On Tue, Jul 21, 2015 at 03:59:40PM -0400, Eric B Munson wrote:
> 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.
> Now that we have the new VMA flag for the locked but not present state,
> expose it as an mmap option like MAP_LOCKED -> VM_LOCKED.

What is advantage over mmap() + mlock(MLOCK_ONFAULT)?

 Kirill A. Shutemov

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