> Tried with upstream qemu on rhel kernel and that's even a bit faster. > So it's ubuntu kernel. vanilla 2.6.32 didn't have vhost at all so maybe their > vhost backport is broken insome way.
You can also reproduce the problem with RHEL6.2 as guest But it seems RHEL 6.3 fixed it. There seem to be a few vhost specific patches between those 2 versions.
