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The MMU is a venerable piece of technology, dating back to the 1960’s. Its page-based memory protection scheme is well-understood and has passed the test of time; I’ve taught its principles to hundreds of undergraduates, and it continues to be a cornerstone of modern OSes.,详情可参考新收录的资料
,详情可参考新收录的资料
(who rarely know what an “Euler totient” is).
https://console.cloud.google.com/marketplace/browse?filter=category:os&filter=price:free&q=freebsd。新收录的资料是该领域的重要参考
attempts = attempts + 1;