Hi, 2015-05-27 21:54 GMT+08:00 Karaoui mohamed lamine <moharaka@xxxxxxxxx>: > 2015-05-27 3:12 GMT+02:00 Le Tan <tamlokveer@xxxxxxxxx>: >> >> 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? > > > No. The same physical address can be used by both the kernel and the > userspace. > The kernel and userspace share the same physical memory. > Any memory page can be allocated for the userspace then released (free) then > re-allocated for kernel use. Got it. Thanks very much! >> 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 > > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
