Today met a choice: suppose that a virtual address and 32-bit operating system there are 48 physical address, a 4 KB page size, and so do you have () in the page table up to page table entries, the answer is 2 power, but only 32-bit physical address, can say so many page table entries, also save the memory?

CodePudding user response:

A page table entries, every 4 KB page table how many is determined by the size of the virtual address, 2 in addition to the 48 power of the 4 k is the number of page table entries, I understand that is not put, only some of the virtual address won't be the map,