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we can say something about idt here.The 16 irqs gived by 8259 often be in idt33-idt48¡£I read mem_init , and feel it is so simple about page-management.only pgd,pte at the address, and a strange memmap is 0 or 1 that dicide the the read mem is used or not.I see a lot of static,extern ,and feel that linux put thing simple and fixed.It's easy system,but big application may be a challenge to it at 1.0.


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