I'm currently trying to reproduce this on a fully uptodate maverick (no -updates) box. I have 3 lucid vm's up, each of which started as a server instance and is doing 'apt-get install openoffice.org' to tax disk (and network). I'm not getting the behavior you are seeing though.
Each VM has its own 30G LVM volume for a root disk, and I'm running each with: kvm -drive file=/dev/data/vm1,if=virtio,index=0,boot=on -m 1G -smp 2 -vnc :1 kvm -drive file=/dev/data/vm2,if=virtio,index=0,boot=on -m 1G -smp 2 -vnc :2 kvm -drive file=/dev/data/vm3,if=virtio,index=0,boot=on -m 1G -smp 2 -vnc :3 Of course at times each kvm process hits 100% of a cpu, but they're absolutely not staying there, and I don't see anything like flush-252:0 even making it into 'top' results. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703811 Title: kvm guest's cpu usage with virtio storage driver goes up to 100% because of flush process -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs