ALLOC_VM_AREA(9) Memory Management in Linux ALLOC_VM_AREA(9)
NAME alloc_vm_area - allocate a range of kernel address space
SYNOPSIS struct vm_struct * alloc_vm_area(size_t size);
ARGUMENTS size size of the area
RETURNS NULL on failure, vm_struct on success
This function reserves a range of kernel address space, and allocates pagetables to map that range. No actual mappings are created. If the kernel address space is not shared between processes, it syncs the pagetable across all processes.
COPYRIGHT Kernel Hackers Manual 2.6. September 2014 ALLOC_VM_AREA(9)