Description of problem: libvirtd crashed after setting blkio weight Version-Release number of selected component (if applicable): libvirt-daemon-6.0.0-7.el8.x86_64 qemu-kvm-4.2.0-12.module+el8.2.0+5858+afd073bc.x86_64 kernel-4.18.0-184.el8.x86_64 How reproducible: 100% Steps to Reproduce: 1. check whether the blkio cgroup is mounted # mount | grep cgroup | grep blkio cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,blkio) 2. check libvirtd pid # pidof libvirtd 56249 3. set blkio weight # virsh blkiotune rhel8.2 --weight 300 error: Disconnected from qemu:///system due to end of file error: Unable to change blkio parameters error: End of file while reading data: Input/output error 4. check libvirtd pid again # pidof libvirtd 57792 Actual results: libvirtd crashed Additional info: 1. get blkio parameters # virsh blkiotune rhel8.2 error: Unable to get blkio parameters error: Requested operation is not valid: blkio cgroup isn't mounted
*** This bug has been marked as a duplicate of bug 1808293 ***