Re: [libvirt] [PATCH 5/5] qemu: Add better message for some invalid block I/O settings

For example when both total_bytes_sec and total_bytes_sec_max are set, but the former gets cleaned due to new call setting, let's say, read_bytes_sec, we end up with this weird message for the command: $ virsh blkdeviotune fedora vda --read-bytes-sec 3000 error: Unable to change block I/O throttle error: unsupported configuration: value 'total_bytes_sec_max' cannot be set if 'total_bytes_sec' is not set So let's make it more descriptive. This is how it looks after the change: $ virsh blkdeviotune fedora vda --read-bytes-sec 3000 error: Unable to change block I/O throttle error: unsupported configuration: cannot reset 'total_bytes_sec' when 'total_bytes_sec_max' is set Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1344897 Signed-off-by: Martin Kletzander <mkletzan(a)redhat.com&gt; --- src/qemu/qemu_driver.c | 46 +++++++++++++++++++++++++++++++--------------- 1 file changed, 31 insertions(+), 15 deletions(-)