this ioctl is used to limit user-desired userptr size as pre-defined
and also could be accessed by only root user.
with userptr feature, unprivileged user can allocate all the pages on system,
so the amount of free physical pages will be very limited. if the VMAs
within user address space was lock
this ioctl is used to limit user-desired userptr size as pre-defined
and also could be accessed by only root user.
with userptr feature, unprivileged user can allocate all the pages on system,
so the amount of free physical pages will be very limited. if the VMAs
within user address space was lock
