device: 0.804
architecture: 0.794
performance: 0.607
graphic: 0.600
network: 0.423
arm: 0.390
x86: 0.234
i386: 0.225
ppc: 0.223
VMM: 0.169
boot: 0.148
KVM: 0.140
peripherals: 0.128
debug: 0.125
vnc: 0.109
TCG: 0.105
risc-v: 0.097
semantic: 0.073
hypervisor: 0.063
mistranslation: 0.060
user-level: 0.060
kernel: 0.036
virtual: 0.027
assembly: 0.017
socket: 0.011
files: 0.011
PID: 0.010
permissions: 0.010
register: 0.006

mmap MAP_NORESERVE of 2^42 bytes consumes 16Gb of actual RAM