Loader tunables for virtio

[Mamontov Roman]

Hello.
I try to change some tunables for vtnet Ethernet driver and set variable:

*hw.vtnet.csum**_*
*disable=1**hw.vtnet.tso**_*
*disable=1**hw.vtnet.lro**_*
*disable=1**hw.vtnet.mq <http://hw.vtnet.mq>**_*
*disable=1*
in /boot/loader.conf file. After reboot I try to read value from
sysctl command, but no luck:

#sysctl hw.vtnet
sysctl: unknown oid 'hw.vtnet'

How I can understand, that these variables set to correct values?

Uname: 11.0-CURRENT r289627.

P.S. I just looking why em0 not work (not see packets from host system
in KVM qemu,
watchdog timeout -- resetting) after update from 9.3 RELEASE.