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