igb driver troubles in 8.0-BETA4

If hw.igb.rxd is not default,
i receive troubles with vlan on interface

Sample:

/boot/loader.conf
Code:
hw.igb.rxd=4096         # IGB Tuning
hw.igb.txd=4096         # IGB Tuning
/etc/rc.conf
Code:
cloned_interfaces="vlan0"
ifconfig_vlan0="inet 10.101.1.1 netmask 255.255.255.252 vlan 3001 vlandev igb0"
i see
Code:
GET BUF: dmamap load failure - 12
many times
 
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