device: 0.784
risc-v: 0.467
boot: 0.429
graphic: 0.386
debug: 0.359
performance: 0.239
vnc: 0.194
arm: 0.183
VMM: 0.157
semantic: 0.153
PID: 0.145
mistranslation: 0.123
TCG: 0.096
ppc: 0.094
register: 0.033
files: 0.026
architecture: 0.021
permissions: 0.020
virtual: 0.017
peripherals: 0.005
socket: 0.003
user-level: 0.003
KVM: 0.002
hypervisor: 0.002
kernel: 0.002
i386: 0.001
assembly: 0.001
network: 0.001
x86: 0.000

Regression report: Disk subsystem I/O failures/issues surfacing in DOS/early Windows [two separate issues: one bisected, one root-caused]