VIRTUAL MEMORY MANAGEMENT SYSTEM, VIRTUAL MEMORY MANAGEMENT DEVICE, VIRTUAL MEMORY INITIALIZATION METHOD, AND VIRTUAL MEMORY INITIALIZATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a computer or the like which is capable of rapidly initializing an extension page.SOLUTION: The computer includes a virtual memory management device 10, an extension page 150 is divided into a plurality of sub-extension pages each of which has a capacity larger than that of a fundamental page, and a page directory entry including a bit map where bits indicate whether respective sub-extension pages have been initialized or not is preliminarily stored in a page directory 50. The virtual memory management device 10 includes an address conversion unit 12 which, if a bit on the bit map corresponding to a sub-extension page index included in a linear address has a value indicating that a corresponding sub-extension page has been initialized, generates a physical address from the linear address and the page directory entry and outputs the physical address.