Hi, I follow the address space thread on the list, and have a question. - Kernel space maps the physical memory to virtual address from 3G to 4G (I am talking about vanilla kernel). So if in the *kernel context*, I access to the virtual address 3G+128MB, then actually I will access to the physical memory at 128MB. The question is: in *kernel context*, do I need the page table? As above, I suppose that since I can work out the physical memory address directly from the virtual address (by subtracting the virtual address with PAGE_OFFSET), so I do not need the page table. So the conclusion is: (in *vanilla kernel*) page tables are only for userspace processes, and kernel space doesnt need page tables at all. Is that correct? Many thanks, NAH -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
