I confirm that without 'cache' option, I have got from iostat those result while doing 'savevm'
Device: sda rrqm/s: 0.00 wrqm/s: 316.00 r/s: 0.00 w/s: 94.80 rkB/s: 0.00 wkB/s: 1541.60 avgrq-sz: 32.52 avgqu-sz: 0.98 await: 10.32 svctm: 10.10 %util: 95.76 I also confirm, that when option 'cache=unsafe' is used, snapshot (from qemu monitor) is done as quickly as it should (few seconds). I am not sure if this is a solution or workaround or just a closer description of a bug. http://libvirt.org/formatdomain.html#elementsDisks describes option 'cache'. When I use that (cache="none") it spits out: error: Failed to create domain from vm.xml error: internal error process exited while connecting to monitor: kvm: -drive file=/home/dum8d0g/vms/deb.qcow2,if=none,id=drive-ide0-0-0,boot=on,format=qcow2,cache=none: could not open disk image /home/dum8d0g/vms/deb.qcow2: Invalid argument When that option is removed, domain is created successfuly. I guess I have another bugreport to fill. So, for me, the issue is somehow solved from the qemu side. I think, this could be marked as wontfix. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/741887 Title: virsh snapshot-create too slow (kvm, qcow2, savevm) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
