What is a page fault?

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What is a pagefault and what does the OS do with it?

Posted 19-Dec-09 21:26pm

cxjlante

Updated 19-Dec-09 21:32pm

0x3c0

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Christian Graus · Answer 1 · 2009-12-19T23:58:00

Solution 2

Please buy a book instead of posting all of your homework questions here

Posted 19-Dec-09 23:58pm

Christian Graus

0x3c0 · Answer 2 · 2009-12-19T21:35:00

A page fault is an exception that is raised by the Memory Management Unit on most computers. It occurs when there's been an access to an unmapped area of memory, or a process has tried to overreach itself by accessing another process' memory space.

The OS simply has to map in the area of memory (sometimes loading it from a swap file) or kill the offending process.