rxcsum and txcsum needs to be disabled under KVM

[C.L. Martinez]

Hi all,

  Yesterday, I have installed CentOS7 in my laptop to do some tests with 
LXC and KVM recent releases.

  One of these guests, it is a FreeBSD 10.1-RELEASE-p6 vm. One of the 
problems that I have detected is with network when virtio nics are used. 
This guest loose a lot of packets until I have disabled rx and tx in all 
virtual nics.

  Is this a FreeBSD bug or do I need to configure something under KVM?

Thanks.