What surprised me was that this entire walk is fully hardware-driven -- no microcode involvement at all. The state machine reads the page directory entry, reads the page table entry, checks permissions, and writes back the Accessed and Dirty bits, all autonomously. Since it's hardware-driven, it runs in parallel with the microcode and needs its own memory bus arbitration -- the paging unit must share the bus with both data accesses from the microcode and prefetch requests from the instruction queue.
"If we find out for example, that 60% of our young people are working in really hard physical labour, we will need to make sure that in 20 years time we've invested in physiotherapy," she said.
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The committee said only doctors should be allowed to carry out high-risk cosmetic procedures because of the risks involved.