On Mon, 2011-04-25 at 12:04 -0600, David Ahern wrote: > > On 04/25/11 11:30, Alex Williamson wrote: > > # modprobe -r igbvf > > # ip link set eth2 vf 6 mac 02:00:10:91:73:01 > > # modprobe igbvf > > # dmesg | grep "igbvf 0000\:01\:11.5\: Address\:" > > igbvf 0000:01:11.5: Address: d2:c8:17:d6:97:f7 > > igbvf 0000:01:11.5: Address: 4e:ee:2a:d8:12:7c > > igbvf 0000:01:11.5: Address: 02:00:10:91:73:01 > > # modprobe -r igbvf > > # echo 1 > /sys/bus/pci/devices/0000:01:11.5/reset > > # modprobe igbvf > > # dmesg | grep "igbvf 0000\:01\:11.5\: Address\:" > > igbvf 0000:01:11.5: Address: d2:c8:17:d6:97:f7 > > igbvf 0000:01:11.5: Address: 4e:ee:2a:d8:12:7c > > igbvf 0000:01:11.5: Address: 02:00:10:91:73:01 > > igbvf 0000:01:11.5: Address: 02:00:10:91:73:01 > > > > So now it sticks. You're going to get random mac addresses on the VFs > > every time you reload the igb driver (ie. ever boot) anyway (at least > > with these sr-iov cards), so if you need consistent macs, they probably > > need to be set before launching the VM anyway. Thanks, > > > > Alex > > > > Ok, I was able to repeat the above commands from the host command line. > > However, when qemu-kvm starts the MAC is reset. > > # ip link show | less > > 2: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP > qlen 1000 > link/ether 00:1b:21:98:b7:10 brd ff:ff:ff:ff:ff:ff > vf 0 MAC 02:12:34:56:80:20 > > --> that's the MAC address I set > > I start qemu-kvm (unpatched version) and the host side sees the address > changed: > > # ip link show | less > > 2: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP > qlen 1000 > link/ether 00:1b:21:98:b7:10 brd ff:ff:ff:ff:ff:ff > vf 0 MAC 7a:17:3f:98:0f:db > > > Can you try that aspect on your end - seeing if the MAC address > maintains after starting qemu-kvm? I don't see this happening on my system, once manually set the mac never changes. I can restart and reset the VM and the host and guest both continue seeing the set mac address. I tested it with both a recent rhel6.1 host kernel as well as upstream 2.6.39-rc4. If I switch to a VF with an unset mac, those will change on each VM reset or restart. Thanks, Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
