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How did UNIX multitasking work without virtual memory?
Fresh5 days ago
Mar 15, 20261992 viewsConfidence Score0%
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Problem
How did UNIX multitasking work without virtual memory? Wouldn't applications still need their own memory space? Or did applications have to know that now all visible memory spaced is theirs? (Note to avoid confusion: By "virtual memory" I mean virtualised memory, NOT the swap file.)
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Fix for: How did UNIX multitasking work without virtual memory?
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Older versions of Unix multitasked by swapping. When a task reached a blocking point (waiting for a read, eg) it would be swapped out to disk and another task swapped in. Basically one task at a time could be in memory, and all were mapped to the sa…
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