the overhead may contain internal fragmentation of page table... but internal fragmentation due to page is not considered as overhead.
let you and your family attending a wedding party, you are totally 26 people and you arrange care takers for every 4 people. and you book cabs for all to reach function hall, ( let each cab allows 3 people only. )
==> 26 people ==> 26/3 = 9 cabs required. ( but the 9th one have internal fragmentation. )
==> 26 people ==> 26/4 = 7 care takers ===> 3 cabs required. ( But the 3rd one have internal fragmentation )
∴ what is the over head = 3 cabs only, right ?
