User Process Space--xkuseg

User Process Space--xkuseg

The first 16 TB of the address space are devoted to user process space. Access to xkuseg is always mapped through the TLB. The kernel creates a unique address space for each user process. Of the 226 possible pages in a process's address space, most are typically unassigned, and many are shared pages of program text from dynamic shared objects (DSOs) that are mapped into the address space of every process that needs them.