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by asveikau
3956 days ago
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On x86 cr3 is a pointer to the page table. (The page table is a mapping set up by the kernel, it maps virtual to physical addresses or in some cases lets the kernel trap memory accesses.) Once you change it, memory access becomes temporarily slower afaik because the TLB (effectively cpu's cache of page table) is discarded. So changing it more frequently can be a bad thing. |
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