Paginated virtual memory

The simplest way to organize the correspondence between physical memory and secondary memory is to break them down into units of fixed size, called pages. The size of pages is generally fixed at 4 kB, although operating systems allow larger pages. With this breakdown into fixed-size pages, figure 6 shows how a process, with its various components (code, data, heap and stack) occupies a certain number of pages, contiguous or not, in virtual space, with the stack and heap evolving during process execution. Each of these virtual pages is housed in a physical page of main memory, with a one-to-one mapping of the logical page number to a physical page number....