<P> A page fault ( sometimes called # PF , PF or hard fault ) is a type of exception raised by computer hardware when a running program accesses a memory page that is not currently mapped by the memory management unit ( MMU ) into the virtual address space of a process . Logically , the page may be accessible to the process , but requires a mapping to be added to the process page tables , and may additionally require the actual page contents to be loaded from a backing store such as a disk . The processor 's MMU detects the page fault , while the exception handling software that handles page faults is generally a part of the operating system kernel . When handling a page fault , the operating system generally tries to make the required page accessible at the location in physical memory , or terminates the program in case of an illegal memory access . </P>
<P> A page fault ( sometimes called # PF , PF or hard fault ) is a type of exception raised by computer hardware when a running program accesses a memory page that is not currently mapped by the memory management unit ( MMU ) into the virtual address space of a process . Logically , the page may be accessible to the process , but requires a mapping to be added to the process page tables , and may additionally require the actual page contents to be loaded from a backing store such as a disk . The processor 's MMU detects the page fault , while the exception handling software that handles page faults is generally a part of the operating system kernel . When handling a page fault , the operating system generally tries to make the required page accessible at the location in physical memory , or terminates the program in case of an illegal memory access . </P>
what is meant by page fault in operating system
what is meant by page fault in operating system
make the required page accessible at the location in physical memory , or terminates the program in case of an illegal memory access
make the required page accessible at the location in physical memory , or terminates the program in case of an illegal memory access