On Mon, Jan 13, 2020 at 01:42:24AM +0100, Oliver Dzombic wrote:

Hi,

i am running:

libvirt-5.6.0-5.fc31.x86_64 5.4.8-200.fc31.x86_64

Using:

<blkiotune> <device> <path>/dev/sda1</path> <read_iops_sec>100</read_iops_sec> <write_iops_sec>100</write_iops_sec> <read_bytes_sec>51200000</read_bytes_sec> <write_bytes_sec>51200000</write_bytes_sec> </device> </blkiotune>

and receiving

error: internal error: Unable to parse 'rbps=max wbps=max riops=100 wiops=max' as an integer

when i try to start it.

I found on Redhat Bugzilla a case that claims that its solved by

Fixed In Version: libvirt-5.6.0-3.el8

While i am running 5.6.0-5.

These are two different packages based on upstream version 5.6.0. The first one is from RHEL-8 and the one you have installed is from Fedora. Each OS is backporting different patches based on reported bugs so the fact that you have 5.6.0-5.f31 doesn't mean that the RHEL BZ fixed in 5.6.0-3.el8 will be in fedora as well.

Maybe its simply because the cgroup v1 is not correctly mounted:

# mount | grep cgroup cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)

# cat /proc/self/cgroup 0::/user.slice/user-0.slice/session-1.scope

Fedora 31 switched to cgroups v2 where you can hit the issue above.

But i didnt find anything how to activate that properly.

I would be thankful for any suggestions.

Can you please clone the RHEL-8 BZ to Fedora 31? Since you are running on Fedora, you can use virt-preview repository with newer Libvirt and QEMU. <https://copr.fedorainfracloud.org/coprs/g/virtmaint-sig/virt-preview/> Pavel