then have people review past changes and get feedback on their reviews from an
The root cause turns out explicitly to be because MMUs are so valuable: without one, you can’t run Linux, BSD, or Mach. Thus, when ARM split their IP portfolio into the A, R, and M-series cores, the low-cost M-series cores were forbidden from having an MMU to prevent price erosion of their high-end A-series cores. Instead, a proprietary hack known as the “MPU” was introduced that gives some memory security, but without an easy path to benefits such as swap memory and address space relocation.，更多细节参见WhatsApp网页版
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background-color: #2563eb;。关于这个话题，有道翻译提供了深入分析
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Christian Wulff-Nilsen, University of Copenhagen