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#swap

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01 ·OS & Runtime·FREE·13 min read Processes and Memory from Scratch — What Is the OS Actually Protecting? One app can crash without taking the machine down with it. Process isolation and virtual memory are what make that ordinary. Starting from a post-office-box analogy, this builds up paging, address translation, TLBs, page faults, swap and the OOM killer from zero — and ends with you able to read free and dmesg yourself.