Alright, I need to classify this bug report. Let's read through it carefully. The user reports that QEMU freezes during drive-mirroring on a fragmented file system. They provided steps to reproduce and details about the setup. First, they created a fragmented disk using a script. Then, they ran a QEMU VM with specific parameters, including enabling KVM. During the drive-mirror operation via QMP, QEMU froze. Looking at the possible categories: kernel, hypervisor, etc. Since this involves KVM and block I/O during mirroring, it's likely related to how QEMU handles storage operations, especially under heavy load or with specific filesystem conditions. The issue seems to occur when handling disk I/O, which is part of the hypervisor's responsibilities. Drive-mirroring is a feature handled by QEMU/KVM for virtual machines. So this falls under the hypervisor category. hypervisor