Transcription of Paging: Introduction
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18 Paging: IntroductionIt is sometimes said that the operating system takes one of two approacheswhen solving most any space-management problem. The first approachis to chop things up intovariable-sizedpieces, as we saw withsegmenta-tionin virtual memory. Unfortunately, this solution has inherent difficul-ties. In particular, when dividing a space into different-size chunks, thespace itself can becomefragmented, and thus allocation becomes morechallenging over , it may be worth considering the second approach: to chop upspace intofixed-sizedpieces. In virtual memory, we call this ideapaging,and it goes back to an early and important system , the Atlas [KE+62, L78].
tofirst split it intotwocomponents: the virtual page number (VPN),and the offset within the page. For this example, because the virtual address ... (older systems) or can be more flexibly managed by the OS (modern systems). machines have gigabytes of memory, it seems a little crazy to use a large chunk of it just for translations, no? And we ...
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