MEM_MMAP, /* use anonynomous mmap */
MEM_MMAPHUGE, /* memory mapped huge file */
MEM_MMAPSHARED, /* use mmap with shared flag */
MEM_MMAP, /* use anonynomous mmap */
MEM_MMAPHUGE, /* memory mapped huge file */
MEM_MMAPSHARED, /* use mmap with shared flag */