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Glossary Term

Page Fault

An exception raised by the CPU when a program accesses a virtual page that is not currently mapped to physical memory.

Page faults are not always errors. They are the mechanism for demand paging, copy on write, and swapping. The OS handles the fault by allocating a frame and retrying.

Related Terms

Virtual Memory Page Table

Used In

Simulate Page Table Walk for Virtual-to-Physical Translation Understand NUMA: Non-Uniform Memory Access in Multi-Socket Systems Implement Slab Allocator for Fixed-Size Kernel Objects Write Microbenchmark Framework with Warmup and Statistics Build Simple Page Table: Map Virtual to Physical Addresses How Memory Actually Works Linkers and Loaders: The Forgotten Tools

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