Virtual memory is conceptually simple but potentially devastating to performance. Every memory access must go through segmentation (add segment base, check limit) and then paging (look up the page table). Naively, paging alone requires two additional memory reads per access -- one for the page directory entry, one for the page table entry.
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‘똘똘한 한채’ 겨냥한 李…“투기용 1주택자, 매각이 낫게 만들것”
Гангстер одним ударом расправился с туристом в Таиланде и попал на видео18:08，这一点在51吃瓜中也有详细论述