Linux 3.17 KVM, qemu 2.1, libvirt 1.2.9 experiences (and how to cleanly disable TCP checksum offload in libvirt)

Update: This issue has been resolved in kernel 3.18.10 release. The below instructions are no longer required if your distribution has updated the kernel or backported the fix. Due to latency issues that I was having with KVM and Windows 2008 R2 with Linux 3.10, I decided to update to Continue Reading

New KVM deployment bugs and recommendations (Ubuntu 14.04: qemu 2.0, libvirt 1.2.4, Linux 3.10)

New Linux KVM qemu deployment, running on Ubuntu 14.04 with Linux 3.10 kernel and openvswitch. Hardware setup is 2 SSD in RAID1, and 2 7200RPM HDD in RAID1 using mdadm. bcache is being used as the backing cache for the HDD. Bugs hv_vapic ("vapic state='on'" in libvirt) causes Windows 2008 Continue Reading

openvswitch and libvirt: vnet port "russian roulette" on restart (solution)

Update: This issue has been resolved in libvirt 1.2.7 release, or commit. The below instructions are no longer required if your distribution has updated the package. libvirt has openvswitch integration. When a virtual machine is started that is using openvswitch for the network port, a vnetX interface is created (where Continue Reading