Quoting William Van Hevelingen ([email protected]): > Hi All, > > Does anyone know about any known issues with KVM on Ubuntu Trusty? > > We're seeing 10-15% iowait on some instances that are essentially idling. > Two different hypervisors are showing the same symptoms. We had no issues > when we were running them on Precise with less powerful machines. > > We're using the paravirtual drivers for the instances disk_type. > > > # uname -a > Linux kvm-andromeda 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC > 2014 x86_64 x86_64 x86_64 GNU/Linux > > # kvm --version > QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.1), Copyright (c) > 2003-2008 Fabrice Bellard
I haven't, but in order to see whether the problem is qemu or the kernel, I would try (a) using the canonical-kernel-team upstream kernel build, with stock trusty qemu, and then (b) use the stock trusty kernel with the qemu built at ppa:ubuntu-virt/virt-daily-upstream -serge -- ubuntu-server mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-server More info: https://wiki.ubuntu.com/ServerTeam
