page fault

Computing Dictionary

page fault definition

memory management
In a paged virtual memory system, an access to a page (block) of memory that is not currently mapped to physical memory. When a page fault occurs the operating system either fetches the page in from secondary storage (usually disk) if the access was legitimate or otherwise reports the access as illegal.
(1995-11-11)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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