Define page fault, Operating System

Page fault is a trap to the software gained by the hardware when a process accesses a page that is goes in the virtual address space, but not added in physical memory. In the hard case the operating system tries to operate the page fault by creating the required page accessible at a location in physical memory disk or kills the process in the case of an illegal access. The system that detects a page fault is the memory management unit in a processor. The exception handling software that operates the page fault is usually part of the operating system.

Contrary to what the name 'page fault' might suggest, page faults are not errors and are necessary and common to raise the amount of memory available to programs in any operating system that use virtual memory, including Unix-like, Microsoft Windows systems, and z/OS. Microsoft access the term hard fault in more recent parts of the source Monitor to mean 'page fault'

 

1809_Page Fault.png

Posted Date: 7/30/2012 1:05:38 AM | Location : United States







Related Discussions:- Define page fault, Assignment Help, Ask Question on Define page fault, Get Answer, Expert's Help, Define page fault Discussions

Write discussion on Define page fault
Your posts are moderated
Related Questions
What are the disadvantages of swapping technique used in pre-3BSD UNIX systems? If there is excessively much memory contention, processes are swapped out until sufficient

explain how response time are reduced by allowing time sharing on top of multiprogramming

What is the MFD? UFD? How are they related? MFD is master-file directory, which points to the UFDs. UFD is user-file directory, which points to each of user's files.

Write a note about Directory structure with examples. The FreeBSD directory hierarchy is basic to obtaining an overall understanding of the system. The most significan

Invalid page fault :If a page fault happens for a reference to an address that's not part of the virtual address space, so that there could not be a page in memory corresponding

Q. Is disk scheduling except FCFS scheduling useful in a single-user environment? describe your answer. Answer: In a single-user environment the I/O queue typically is empty.

Define approaches that require knowledge of the system state?  Answer: Deadlock detection, Deadlock prevention, Deadlock Avoidance.

my Operating System is windows trust but when the windows start say its windows xp. help pleaes

FIRST FIT ALGORITHM Scanning a list along with if a free hole is available with necessary space for the process to allocate it allocates the process in that space. The first s