Answer: Taking page frames from other working sets
Paging is an important
part of virtual memory implementations in modern operating systems.
Frame stealing is the
process of taking an assigned central storage frame away from an address space
to make it available for other purposes, such as to satisfy a page fault or
swap in an address space.
In pure demand paging,
pages are loaded only when they are referenced. Some operating systems
periodically look for pages that have been gone unreferenced for a long time
and perform page stealing (freeing the page frame and adding it to the free
page queue).
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