search for: virqemumonitorcommand

Hi, Has anyone met the same problem that virsh hangs when there are some backup jobs running on the kvm host? I use dirty bitmap supported by qemu to do backups every 6 minitues. About a few hours later, I ran 'virsh list', It hung. Then I stopped the backup jobs ?nothing was getting better. I had checked the libvirt logs ?but found nothing useful . Maybe the high I/O caused the

.... About a few hours later, I ran 'virsh list', It hung. Then I stopped the backup jobs ?nothing was getting better. I had checked the libvirt logs ?but found nothing useful . How are you using dirty bitmaps? As my new virDomainBackupBegin() API has not landed yet, I suspect you are using virQemuMonitorCommand() (virsh qemu-monitor-command) backdoors, which is explicitly unsupported (that is, if it breaks, you get to debug it - it exists for development work, and while 'query-*' QMP commands should be safe, commands that alter qemu state such as kicking off a backup job may break libvirt expectat...