mmap & the length of the mapping

[mineiro]

Sorry, my fault, that was 500MB test.
With 1TB I received death signal. I rewrote and execute program again just to have sure.

Master Yoda say: Exist questions without answer my son 
Well, do you know a good way to search in memory or disk? (disk mounted or unmount) I can change program to write "YodaYoda" N times and after search for that string.

[mabdelouahab]

Thanks Minerio
Thus, we make sure that the reserved space is not real, and this is the logical explanation