Hi, Is there an explict split between userspace and kernel in physical memory on Linux x86-64? That is, given a physical address, can I tell whether this address is from userspace or not? As far as I know, in virtual address space, the kernel will use the upper half and the userspace will use the lower half. But what about in physical address space? Thanks very much! Le _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies